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Precoding Matrix patents

      

This page is updated frequently with new Precoding Matrix-related patent applications.

Channel quality indicator feedback method, user equipment, and network device
Embodiments of the present disclosure disclose a channel quality indicator (cqi) feedback method, user equipment, and a network device. The method includes: receiving, by the user equipment, a secondary pilot receive signal of each single sector and that is obtained after a secondary pilot transmit signal of each single sector transmitted by a network device is transmitted by using a radio channel; estimating, by the user equipment, a channel matrix according to the secondary pilot receive signal of each single sector and the pre-known secondary pilot transmit signal of each single sector; estimating, by the user equipment, a cqi of each single sector according to the channel matrix and a first precoding matrix, and estimating a cqi of each joint sector according to the channel matrix and a second precoding matrix; and feeding back, by the user equipment, each cqi to the network device..

Layer mapping, csi feedback and harq feedback in mobile communications
Techniques and examples of layer mapping, channel state information (csi) feedback and hybrid automatic repeat request (harq) feedback in mobile communications are described. A user equipment (ue) receives from a base station one or more reference signals, which may be non-zero power (nzp) or zero power (zp), on one or more time-frequency resources indicated by a network via a communication link between the ue and the base station.

High-resolution csi reporting based on unequal bit allocation in advanced wireless communication systems
Methods and apparatuses for reporting a precoding matrix indicator (pmi). A user equipment (ue) includes a processor configured to generate a report for a pmi.

Transmission device and transmission method
A transmission device comprising: a weighting circuitry which, in operation, generates transmission signals of n streams (n is an integer of 3 or more) by weighting modulated signals of the n streams using a predetermined fixed precoding matrix; a phase changing circuitry which, in operation, regularly changes each phase of a symbol series included in each of the transmission signals of the n streams; and a transmitter which, in operation, transmits the transmission signals of the n streams from different antennas, the phases of each of the transmission signals of the n streams being changed in each symbol, wherein the transmission signal of an i-th stream has an mi kind of phase change value yi(t) (i is an integer between 1 and n (inclusive), 0≤yi<2π, and mi is set in each stream, t is an integer of 0 or more, and indicates a symbol slot), and the phase changing circuitry changes the phase in one or more u (u=m1×m2× . .

Method for determining precoding matrix indicator, receiving device, and sending device
Embodiments of the present invention provide a method for determining a precoding matrix indicator, a receiving device, and a sending device. The method for determining a precoding matrix indicator includes: selecting, by a receive end, a precoding matrix w from a codebook based on a reference signal sent by a transmit end, where the precoding matrix w is a product of two matrices w1 and w2, where the w1 includes nb block matrices xi, nb≥1, and the w1 is indicated as: w1=diag{x1, .

Operation for 3d beam forming in a wireless communication system
Here, operation for 3d beam forming is disclosed. Ue, receiving reference signals from one or more base stations (enbs), may report feedback information comprising precoding matrix information to the one or more enbs.

Method for transmitting and receiving channel state information in wireless communication system and device therefor
Disclosed are a method for transmitting and receiving channel state information in a wireless communication system and a device therefor. Specifically, a method for transmitting channel state information (csi) by a terminal in a wireless communication system may comprise the steps of: receiving, from a base station, setting information for a single csi process including a first channel state information-reference signal (csi-rs) configuration, which is associated with k csi-rs resources of a beamformed csi-rs type, k being greater than one, and a second csi-rs configuration, which is associated with one csi-rs resource of the beamformed csi-rs type; reporting, to the base station, an indicator indicating a csi-rs resource selected from among the k csi-rs resources; and reporting, to the base station, a channel quality indicator (cqi)/precoding matrix indicator (pmi)/rank indicator (ri) derived on the basis of the one csi-rs resource..

Updating precoding matrix for mimo transmissions
The present disclosure discloses that a device uses precoding to transmit independent data streams to existing users and additional independent data streams to one or more new users simultaneously. During a first transmission of a first one or more data streams that are precoded using a first precoding matrix, the device determines to transmit a second one or more data streams in a second transmission.

Transmission scheme for wireless communication systems
A method of two-layer (rank=2) demodulation reference signal (dmrs) based transmission scheme is proposed. The precoding matrix on a data re can be represented as a×b.
Mediatek Inc.


Method of signal generation and signal generating device
A transmission method simultaneously transmitting a first modulated signal and a second modulated signal at a common frequency performs precoding on both signals using a fixed precoding matrix and regularly changes the phase of at least one of the signals, thereby improving received data signal quality for a reception device.. .
Sun Patent Trust


Transmission method, transmitter apparatus, reception method and receiver apparatus

Transmission quality is improved in an environment in which direct waves dominate in a transmission method for transmitting a plurality of modulated signals from a plurality of antennas at the same time. All data symbols used in data transmission of a modulated signal are precoded by hopping between precoding matrices so that the precoding matrix used to precode each data symbol and the precoding matrices used to precode data symbols that are adjacent to the data symbol in the frequency domain and the time domain all differ.
Sun Patent Trust

Data transmission method and apparatus

Embodiments of the present invention provide a data transmission method and apparatus, and the method includes: modulating to-be-sent information bits according to a lower order constellation diagram, and generating 4m lower order modulation symbols; multiplying a precoding matrix q by a column vector including every four lower order modulation symbols in the 4m lower order modulation symbols, to obtain 4m to-be-sent higher order modulation symbols corresponding to a higher order constellation diagram; and respectively and correspondingly sending the 4m to-be-sent higher order modulation symbols on different carriers of two antennas. The to-be-sent higher order modulation symbols include some or all to-be-sent information bits.

Information feedback method, information feedback device and user equipment

The present disclosure relates to the field of communication technology, and provides an information feedback method, an information feedback device and a ue. The information feedback method includes steps of: acquiring pmis of multiple-level component precoding matrices of a precoding matrix for downlink data transmission; and feeding back the pmi of each of the multiple-level component precoding matrices of the precoding matrix to a base station individually, or feeding back the jointly encoded pmis, each of which is the pmi of each of the multiple-level component precoding matrices of the precoding matrix, to the base station..

Feedback apparatus and method in multi-antenna system

Disclosed are feedback and transmission devices and methods in full-dimension multi-antenna systems using two-dimensional (2d) planar array antennas, wherein a ue estimates channel states each corresponding to a respective one of multiple domain channels by a reference signal received from a base station, and obtains precoding matrix indicators (pmis) each corresponding to a respective one of the multiple domain channels and rank indicators (ris) each corresponding to a respective one of the multiple domain channels based on the estimated channel states. The ue may determine a joint rank indicator (jri) using the obtained pmis and the ris and transmit feedback information containing the determined jri to the base station..

Method for transmitting and receiving channel state information (csi) in wireless communication system, and apparatus therefor

A method for transmitting and receiving channel state information (csi) in a wireless communication system, and an apparatus therefor are disclosed. Specifically, a method for a terminal transmitting csi in a wireless communication system supporting multi-user superposition transmission (must) may comprise the steps of: reporting to a base station a first precoding matrix indicator (pmi) indicating a precoding matrix that is the most preferred by the terminal, and a first channel quality indicator (cqi) that is calculated assuming use of the first pmi; and reporting to the base station a second pmi indicating a precoding matrix that is secondly preferred by the terminal, and a second cqi that is calculated assuming use of the second pmi..
Lg Electronics Inc.

Signal generation method and signal generation device

A transmission method simultaneously transmitting a first modulated signal and a second modulated signal at a common frequency performs precoding on both signals using a fixed precoding matrix and regularly changes the phase of at least one of the signals, thereby improving received data signal quality for a reception device.. .
Sun Patent Trust

Communication technique using csi-rs in mobile communication system

Disclosed is a 5g or pre-5g communication system to be provided so as to support a data transmission rate higher than that of a 4g communication system, such as lte. Disclosed is a communication method of a base station using a channel state information reference signal (csi-rs) in a mobile communication system, the method comprising the steps of: receiving a sounding reference signal (srs) from a terminal; selecting a precoding matrix by using the received srs; transmitting a csi-rs by using the selected precoding matrix; receiving a csi report from the terminal, and determining a transmission parameter on the basis of the csi report; and transmitting data to the terminal by applying the determined transmission parameter thereto, wherein the csi-rs is aperiodically transmitted..
Samsung Electronics Co., Ltd.

Channel state information feedback method and apparatus

The present disclosure relates to a 5g or pre-5g communication system for supporting a higher data transfer rate beyond a 4g communication system such as lte. A method and an apparatus for transmitting and receiving channel state information are disclosed.
Samsung Electronics Co., Ltd.

Precoding matrix determination method and precoding matrix determination device

A precoding matrix determination method and a precoding matrix determination device are provided. The precoding matrix determination method includes: dividing each of the groups of vertical-dimension beams into a plurality of subgroups of vertical-dimension beams, and dividing each of the groups of horizontal-dimension beams into a plurality of subgroups of horizontal-dimension beams; determining a first stage codebook in accordance with a kronecker product of each subgroup of vertical-dimension beams acquired by dividing each of the groups of vertical-dimension beams and each subgroup of horizontal-dimension beams acquired by dividing each of the groups of horizontal-dimension beams; and selecting a plurality of columns of beams from the determined first stage codebook using a second stage codebook, and performing phase adjustment to determine a precoding matrix..
China Academy Of Telecommunications Technology

Method for determining precoding matrix indicator, user equipment, and base station

A method for determining a precoding matrix indicator, user equipment, and a base station are disclosed in embodiments of the present invention. The method includes: receiving a first reference signal set sent by a base station, where the first reference signal set is associated with a user equipment-specific matrix or matrix set; selecting a precoding matrix based on the first reference signal set, where the precoding matrix is a function of the user equipment-specific matrix or matrix set; and sending a precoding matrix indicator to the base station, where the precoding matrix indicator corresponds to the selected precoding matrix.
Huawei Technologies Co.,ltd.

Methods and apparatuses for transmitting coding indication information and determining precoding matrix

Methods and apparatuses for transmitting coding indication information and determining a precoding matrix, for use in resolving the problem that the resolution of code words in a codebook generated by using a combination of a beam vector subgroup and column selection cannot be flexibly adjusted. The method comprises: determining first precoding indication information and second precoding indication information, the first precoding indication information corresponding to a first-stage precoding matrix, the second precoding indication information corresponding to a direction weighting vector and a phase adjustment factor, the direction weighting vector being used for performing interpolation processing on parts representing angles corresponding to beam vectors in the all beam vectors in each polarization direction in the first-stage precoding matrix, the phase adjusting factor being used for performing phase adjustment on different polarization directions of the first-stage precoding matrix, and the first-stage precoding matrix, the direction weighting vector, and the phase adjustment factor being used for generating a precoding matrix.
China Academy Of Telecommunications Technology

Artificially mutual-coupled antenna arrays

A mechanism for mutually coupling multiple antennas for transmission in a wireless communication environment, wherein, for a received or transmitted radio signal a precoding matrix is created that includes artificial mutual antenna coupling coefficients and processing the received or transmitted radio signal using the created precoding matrix.. .
Nokia Solutions And Networks

Lpi/lpd communication systems

In a wireless communication system, a secure communication link is provided by selecting a decoy data signal vector for transmission, generating a mimo precoding matrix from a message to be sent; and multiplying the decoy data signal vector by the mimo precoding matrix to construct a precoded signal vector. The mimo precoding matrix produces information-bearing synthesized channel distortions in the transmitted signal.
Department 13, Inc.

Wireless communication system, central unit equipment, distributed unit equipment, communication central unit equipment, and communication distributed unit equipment

In a partial centralization system configuration, a wireless communication system of the present invention transmits a precoding matrix generated in a media access control (mac) function or a matrix or vector obtained by dividing the precoding matrix between central unit equipment and distributed unit equipment in addition to data of modulated symbols necessary for a precoding matrix calculation and downlink control information (dci) corresponding to the data.. .
Nippon Telegraph And Telephone Corporation

Method and short-term feedback in multi-input multi-output communications

Embodiments of the present disclosure provide a method and apparatus for multi-input multi-output mimo communications in a wireless communication network. The method comprises: receiving, from a device, long-term precoding information for the mimo communication, the long-term precoding information indicating a first group of beams for a first antenna polarization, and a second group of beams for a second antenna polarization (s201); receiving, from the device, short-term precoding information for use in the mimo communication, the short-term precoding information indicating beams selected respectively from the first group of beams and the second group of beams for different antenna polarizations (s202); constructing a precoding matrix for the mimo communication according to the long-term precoding information and short-term precoding information (s203); and transmitting data encoded according to the precoding matrix to the device (s204).
Alcatel Lucent

Downlink multiple input multiple output enhancements for single-cell with remote radio heads

A base station selects a subset of at least one geographically separated antennas for each of the plurality of user equipments. The base station forms at least layer of data stream including modulated symbols, precodes the data stream via multiplication with the nt-by-n precoding matrix where n is the number of said layers and nt is the number of transmit antenna elements and transmits the precoded layers of data stream to the user equipment via the selected geographically separated antennas.
Texas Instruments Incorporated

Downlink multiple input multiple output enhancements for single-cell with remote radio heads

A base station selects a subset of at least one geographically separated antennas for each of the plurality of user equipments. The base station forms at least layer of data stream including modulated symbols, precodes the data stream via multiplication with the nt-by-n precoding matrix where n is the number of said layers and nt is the number of transmit antenna elements and transmits the precoded layers of data stream to the user equipment via the selected geographically separated antennas.
Texas Instruments Incorporated

Method for determining precoding matrix indicator, user equipment, and base station

A method for determining a precoding matrix indicator, user equipment, and a base station are disclosed in embodiments of the present invention. The method includes: receiving a first reference signal set sent by a base station, where the first reference signal set is associated with a user equipment-specific matrix or matrix set; selecting a precoding matrix based on the first reference signal set, where the precoding matrix is a function of the user equipment-specific matrix or matrix set; and sending a precoding matrix indicator to the base station, where the precoding matrix indicator corresponds to the selected precoding matrix.
Huawei Technologies Co.,ltd.

Facilitation of computational complexity reduction for periodic and aperiodic channel state information reporting in 5g or other next generation network

Using channel state information (csi), e.g., rank information, precoding matrix index, etc., that is reported periodically by a user equipment, a complexity of reporting of aperiodic csi reporting can be reduced, by reducing a search space of a codebook used for the aperiodic csi reporting, when the ue is configured with periodic and aperiodic csi reporting. A periodic configuration of a mobile device is facilitated for transmissions of channel state data periodically, and, in response to sending a reference signal, first channel state data of the channel is received according to the periodic configuration.
At&t Intellectual Property I, L.p.

Codebook-based signal transmission/reception method in multi-antenna wireless communication system, and device for same

Disclosed are a codebook-based signal transmission/reception method in a multi-antenna wireless communication system, and a device for same. Specifically, provided is a method by which a terminal transmits/receives a signal on the basis of a codebook, in a 2-dimensional multi-antenna wireless communication system, comprising the steps of: receiving a channel state information reference signal (csi-rs) from a base station, via a multi-antenna port; and reporting channel state information to the base station.
Lg Electronics Inc.

Method for reporting csi in wireless communication system and device for same

Disclosed in the present invention is a method for reporting, by a terminal, channel status information (csi) to a base station in a wireless communication system. The csi reporting method is characterized by including the steps of: transmitting, to a base station, first csi including a rank indicator in a first period unit; transmitting, to the base station, second csi including a vertical precoding matrix index in a second period unit within the first period; and transmitting, to the base station, third csi including horizontal precoding matrix index in a third period unit within the second period..
Lg Electronics Inc.

Resource selection method and apparatus, and electronic device

Embodiments of the present invention disclose a resource selection method and apparatus. The method includes: configuring a csi process for a second device, where the csi process is corresponding to configuration information of k reference signal resources or configuration information of k reference signal antenna port groups; and sending a reference signal to the second device according to the configuration information corresponding to the csi process, so that the second device obtains a corresponding channel quality measurement result by measuring the reference signal, where the channel quality measurement result includes a precoding matrix indicator (pmi), the pmi is used to indicate a serial number of a precoding matrix selected by the second device, the selected precoding matrix is a matrix in a preset precoding matrix set, and the preset precoding matrix set is determined according to k and a quantity t of beams that need to be selected..
Huawei Technologies Co., Ltd.

Method and device for feeding back channel state information in multi-input multi-output system

A method and device for feeding back channel state information (csi) in a multi-input multi-output system are provided. In the method, user equipment (ue) feeds back csi comprising codebook index information to an evolved node b (enodeb).
Zte Corporation

Signal generation method and signal generation device

A transmission method simultaneously transmitting a first modulated signal and a second modulated signal at a common frequency performs precoding on both signals using a fixed precoding matrix and regularly changes the phase of at least one of the signals, thereby improving received data signal quality for a reception device.. .
Sun Patent Trust

Downlink precoding method and base station

Disclosed are a downlink precoding method and a base station. The method includes: configuring a first precoding mode for a first cell, wherein the first precoding mode includes information of a precoding matrix configured for each candidate user of the first cell on each resource; selecting a scheduling user on each resource from candidate users according to the first precoding mode; and performing precoding to a channel estimation signal and downlink data of the scheduling user according to a precoding matrix of the scheduling user, and transmitting precoded channel estimation signal and precoded downlink data to the scheduling user.
Ntt Docomo C/o Deqi Intellectual Prop. Law Corp.

System and hierarchal beamforming and rank adaptation for hybrid antenna architecture

An embodiment method for beam-related information and channel state information feedback includes receiving first analog beamformed reference signals; transmitting a first report indicating a set of selected analog beamformed reference signals and a transmission rank that jointly maximize a first performance criterion for subsequent transmissions by a transmitter that transmitted the first analog beamformed reference signals; receiving second analog beamformed reference signals maximized in accordance with the set of selected analog beamformed reference signals and the transmission rank; and transmitting a second report, in accordance with the second analog beamformed reference signals, indicating a channel quality indicator and a precoding matrix indicator that maximize a second performance criterion for subsequent transmissions by the transmitter that transmitted the first analog beamformed reference signals and the second analog beamformed reference signals.. .
Futurewei Technologies, Inc.

Codebook-based signal transmission/reception method in multi-antenna wireless communication system, and device for same

Disclosed are a codebook-based signal transmission and reception method in a multi-antenna wireless communication system and an apparatus therefor. Specifically, a method for transmitting or receiving a signal on the basis of a codebook by a terminal in a 2-dimensional multi-antenna wireless communication system comprises the steps of: receiving a channel state information reference signal (csi-rs) through a multi-antenna port from a base station; and reporting channel state information to the base station, wherein the channel state information may include a precoding matrix indicator (pmi) for indicating a precoding matrix, the pmi may include a first pmi for selecting a set of precoding matrixes from the codebook and a second pmi for selecting one precoding matrix from the set of precoding matrixes..
Lg Electronics Inc.

Method and csi reporting in elevation beamforming and fd-mimo

Methods, systems, and devices are described for wireless communication. The ue may identify, at a user equipment (ue), a codebook type indicator (cti) that indicates a codebook among a set of codebooks, such that the codebook may be associated with a two-dimensional antenna port structure of a base station, select a precoding matrix indicator (pmi) based on the cti, and transmit a channel state information (csi) report including the pmi.
Qualcomm Incorporated

Subset of w2 sending precoding information and feeding back precoding information

This application discloses a precoding information sending solution and a precoding information feedback solution. A base station generates a signaling indicator and sends the signaling indicator to user equipment.
Huawei Technologies Co., Ltd.

Uplink mimo codebook for advanced wireless communication systems

Methods and apparatuses for a codebook for uplink mimo in advanced wireless communication systems. A user equipment (ue) includes a processor and a transceiver operably connected to the processor.
Samsung Electronics Co., Ltd.

Phase-rotation of svd-based precoding matrices

A wireless device configured to process multiple-input multiple-output (mimo) data streams. The wireless device includes a singular value decompostion (svd) engine configured to diagonalize a channel matrix into a precoding matrix; an svd rotation engine configured to phase-rotate the precoding matrix, such that the channel matrix is partially de-diagnalized; and a transmitter configured to transmit a data packet corresponding to the phase-rotated precoding matrix..
Intel Ip Corporation

Uplink transmit diversity and precoding

A configurable new radio (nr) uplink (ul) transmission may use transmit diversity. A user equipment (ue) may identify an uplink transmission of at least one stream as using one of cyclic prefix orthogonal frequency division multiplexing or discrete fourier transform spread orthogonal frequency division multiplexing.
Qualcomm Incorporated

Transmission device and transmission method

A first transmission signal and a second transmission signal are generated from a first modulated signal and a second modulated signal by using a precoding matrix, and parameters of the precoding matrix are calculated from feedback information.. .
Panasonic Intellectual Property Corporation Of America

Disclosed are a channel state information feedback and a control method and device therefor, which are used for realizing large-scale csi feedback under an antenna system, wherein a ue may only need to feedback some pieces of pmi information, so that the complexity of the ue feeding back csi is reduced, and the flexibility for a network side to control the ue to feed back the csi is better. The channel state information (csi) feedback control method provided in the present application comprises: a base station determining that there is a need to control a user equipment (ue) to feed back csi, the csi at least comprising a first precoding matrix indicator (pmi) and a second pmi, the first pmi and the second pmi corresponding to the same precoding matrix; and the base station sending trigger signaling of csi feedback to the ue, wherein indication information used for instructing whether the ue feeds back the first pmi and/or the second pmi is comprised..
China Academy Of Telecommunications Technology

Codebook configuration method and user equipment

The present invention provides a codebook configuration method and user equipment. The ue receives a reference signal that is of an antenna whose quantity of antenna ports is x and that is sent by a base station and configuration information of a codebook subset restriction for the quantity x of antenna ports, where the configuration information of the codebook subset restriction for the quantity x of antenna ports includes first configuration information and second configuration information; determines, according to the configuration information of the codebook subset restriction for the quantity x of antenna ports, a precoding matrix on which channel measurement and feedback need to be performed; and obtains, by means of measurement according to the reference signal, the precoding matrix on which channel measurement and feedback need to be performed and that is of antenna ports..
Huawei Technologies Co., Ltd.

Method and transmitting signal using multiple radio unit

A method and an apparatus for transmitting a signal by using a plurality of radio units (rus) to a user equipment (ue). The apparatus is configured to: determine an ru set including at least two rus of the plurality of the rus based on a feedback regarding a received strength of a transmission beam formed by the plurality of the rus, wherein the feedback is received from the ue; determine a distributed precoding matrix of which a diversity order is predetermined based on information about an ru included in the ru set; and perform a precoding based on the distributed precoding matrix and transmitting a precoded signal to the ue through the ru set..
Electronics And Telecommunications Research Institute

Precoding with a codebook for a wireless system

A base station used in a wireless communications system with multiple transmission ranks is disclosed. The base station comprises a memory to store a codebook for a transmission rank, a beamforming controller to precode data with a precoding matrix selected from the codebook, and a transmitter to transmit the precoded data to a user equipment, wherein the precoding matrix is selected according to a first description and a second description, which are unique to the precoding matrix, and wherein the second description provides a finer description of the codebook than the first description.
Nec Corporation

Multi-hypothesis channel quality indicator feedback

A method for providing multi-hypothesis channel quality indicator (mh-cqi) feedback is described. Hypotheses corresponding to rank indicator (ri) and precoding matrix indicator (pmi) assumptions associated with a dominant interferer are selected.
Qualcomm Incorporated

User terminal, radio base station and radio communication method

To reduce a reception processing load, while obtaining gain of non-orthogonal multiple access (noma), in the case of transmitting a downlink signal using the noma scheme, a user terminal according to one aspect of the present invention is provided with a transmission section that transmits a plurality of precoding matrix indicators (pmis) to a radio base station, and a reception section that receives, from the radio base station, a downlink signal that is non-orthogonally multiplexed with a downlink signal to another user terminal determined based on the plurality of pmis and that is multiplied by the same precoding matrix as that of the downlink signal to another user terminal.. .
Ntt Docomo, Inc.

Power allocation and precoding matrix computation method in a wireless communication system

This invention presents methods for power allocation for each data stream on each transmitting antennas in mu-mimo wireless communication systems comprising the bs computing the temporary beamforming matrix, constructing special matrices and vectors with the maximum transmitting power on each antenna, the allocated power to each data stream, the channel quality of each data stream, and the amplitude of each element of the temporary beamforming matrix, calculating the power allocated to each data stream on each antenna with the calculated special matrices and vectors, and adjusting each element of the temporary beamforming matrix to obtain the final beamforming matrix.. .
Rf Dsp Inc.

Transmission method, transmission apparatus, reception method and reception apparatus

All data symbols used in data transmission of a modulated signal are precoded by hopping between precoding matrices so that the precoding matrix used to precode each data symbol and the precoding matrices used to precode data symbols that are adjacent to the data symbol in the frequency domain and the time domain all differ. A modulated signal with such data symbols arranged therein is transmitted..
Sun Patent Trust

Channel state information (csi) feedback and subsampling

A method implemented in a base station used in a wireless communications system is disclosed. The method comprises receiving, from a user equipment, rank indication (ri), a first precoding matrix indicator (pmi), and a second pmi (codebook index i2), wherein values 0-15 are assigned to the second pmi ipmi2 for ri=1 and values 0-3 are assigned to the second pmi ipmi2 for each of ri=2, ri=3, and ri=4, and wherein codebook index i2 comprises ipmi2 for ri=1.
Nec Corporation

Receiving method and receiving apparatus

All data symbols used in data transmission of a modulated signal are precoded by switching between precoding matrices so that the precoding matrix used to precode each data symbol and the precoding matrices used to precode data symbols that are adjacent to the data symbol along the frequency axis and the time axis all differ. A modulated signal with such data symbols arranged therein is transmitted..
Sun Patent Trust

Transmission method, transmitter apparatus, reception method and receiver apparatus

Transmission quality is improved in an environment in which direct waves dominate in a transmission method for transmitting a plurality of modulated signals from a plurality of antennas at the same time. All data symbols used in data transmission of a modulated signal are precoded by hopping between precoding matrices so that the precoding matrix used to precode each data symbol and the precoding matrices used to precode data symbols that are adjacent to the data symbol in the frequency domain and the time domain all differ.
Sun Patent Trust

Method, apparatus and communication unit

A method, an apparatus and a communication unit for generating precoding feedback information in a multiple frequency radio transmission system are disclosed. A rank for precoding matrices, wherein the rank is constant over the multiple frequencies, is selected and a plurality of precoding matrices having the selected rank are selected.
Intel Deutschland Gmbh

Beamforming in antenna systems

Apparatuses, methods, and systems for beamforming in antenna systems are disclosed. A method includes determining an unconstrained analog precoding matrix (frf,uc), wherein the unconstrained analog precoding matrix (frf,uc) is determined based on m dominant eigenvectors of the sum of spatial channel covariance matrices of k users, and wherein k indicates a number of users communicating with a base station.
Facebook, Inc.

Uplink mimo design

Aspects of the disclosure relate to multiple-input multiple-output (mimo) signals, and the determination of a precoding matrix for configuring the mimo signals. An uplink traffic channel may be configured utilizing orthogonal frequency division multiplexing (ofdm) waveform.
Qualcomm Incorporated

Cooperative communication method and system

A cooperative communication method and a cooperative communication system are provided for the transmission between multiple transmission devices and their corresponding receiving devices. In a first phase of a communication period, at least one of the multiple transmission devices performs a first phase precoding on data using a multicasting precoding matrix so as to transmit the data precoded by the first phase precoding to other transmission devices.
Industrial Technology Research Institute

Method and feeding back channel state information, user pairing method and apparatus, data transmitting method and apparatus and system

Embodiments of this disclosure provide a method and apparatus for feeding back channel state information, a user pairing method and apparatus, a data transmitting method and apparatus and a system. In one embodiment, the apparatus for feeding back channel state information includes: a feedback unit configured to feed back channel state information to an enb, the channel state information including a precoding matrix index (pmi); a first channel quality indicator (cqi1) corresponding to the pmi; and azimuth angle reference information.
Fujitsu Limited

Method for efficient channel estimation and beamforming in fdd system by exploiting uplink-downlink correspondence

A method for selecting at least one parameter for downlink data transmission with a mobile user equipment. The method is executable by a wireless communication base station having multiple antennas configured to communicate wirelessly with the mobile user equipment.
Intel Corporation

Mobile station, radio base station, and radio communication method

According to an aspect of the present invention, a mobile station, which carries out communication using a plurality of antenna ports, includes a receiving section configured to receive, from a radio base station, first-amount information that indicates a number of antenna ports in a first dimension, and second-amount information that indicates a number of antenna ports in a second dimension; and a transmitting section configured to transmit, to the radio base station, a precoding matrix codebook index that is obtained using the first-amount information and/or the second-amount information. Accordingly, a mobile station, a radio base station and a radio communication method can be provided in which a precoding matrix for a two-dimensional antenna array can be generated with flexibility..
Ntt Docomo, Inc.

Radio base station, user terminal, radio communication system and radio communication method

To suppress deterioration of reception characteristics of a user terminal even in the case where a radio base station performs power multiplexing on downlink mimo signals to transmit, a radio base station according to one aspect of the present invention has a transmission section that performs power multiplexing on downlink signals to a plurality of user terminals each having a mimo (multiple-input multiple-output) configuration to transmit, and a control section that controls a pmi (precoding matrix indicator) and/or an ri (rank indicator) applied to the downlink signals, where the transmission section transmits information on the pmi and/or the ri of another user terminal subjected to power multiplexing to a predetermined user terminal.. .
Ntt Docomo, Inc.

Signal generation method and signal generation device

A transmission method simultaneously transmitting a first modulated signal and a second modulated signal at a common frequency performs precoding on both signals using a fixed precoding matrix and regularly changes the phase of at least one of the signals, thereby improving received data signal quality for a reception device.. .
Sun Patent Trust

Method for determining precoding matrix indicator, user equipment, and base station evolved nodeb

The present invention relates to a method for determining a precoding matrix indicator, a user equipment (ue), a base station (e.g., enb), and a system. The method includes: receiving a reference signal sent by a base station; selecting, based on the reference signal, a precoding matrix from a codebook, where a precoding matrix w included in the codebook is a product of two matrices w1 and w2, where w1 is a block diagonal matrix, where each block matrix is a kronecker product of a matrix ai and a matrix bi; and sending a precoding matrix indicator pmi to the base station, where the pmi corresponds to the selected precoding matrix, so that the base station obtains the precoding matrix according to the pmi..
Huawei Technologies Co., Ltd.

Method and determining precoding matrix indicator, user equipment, and base station

A method and an apparatus determine a precoding matrix indicator, user equipment, and a base station. The method includes: determining a precoding matrix indicator pmi, where the pmi corresponds to a precoding matrix w, and the precoding matrix w satisfies a first condition, a second condition, or a third condition; and sending the pmi to a base station.
Huawei Technologies Co., Ltd.

Method for feeding back channel state information and an apparatus

The present application discloses a method for feeding back channel state information (csi), comprising: acquiring first and second csi based on a first and a second csi measurement resource respectively, obtaining a channel quality indicator (cqi) based on the first csi and the second csi, wherein the first csi comprises a first and a second type of precoding matrix indicator (pmi1 and pmi2) and a first rank indicator (rh), and the second csi comprises a first and a second type of pmi (pmi3 and pmi4) and a second ri (ri2); and feeding back third csi to a base station, wherein the third csi comprises third pmi information, third ri information, and the cqi, wherein the third pmi information is obtained based on at least three of the pmi1, the pmi2, the pmi3, and the pmi4, and the third ri information is obtained based on the ri1 and the ri2.. .
Huawei Technologies Co., Ltd.

Base station, user equipment, and determining precoding matrix

A base station that communicates with a user equipment using multiple antenna ports includes an uplink channel estimation unit that estimates uplink channel states, a downlink channel estimation unit that estimates downlink channel states based on the estimated uplink channel states and channel reciprocity of uplink and downlink, a receiver unit that receives from the user equipment csi feedback information, and a precoder generating unit that determines a precoding matrix of downlink based on channel state information (csi) indicating the estimated downlink channel states and on the csi feedback information.. .
Ntt Docomo, Inc.

Signal transmission

Embodiments of the present invention provide a signal transmission method and device. The method includes: determining, by a sending device, a target precoding matrix v, where v=(h)−1·{tilde over (h)}, h indicates a channel matrix between the sending device and a receiving device, {tilde over (h)} indicates an equivalent channel matrix between the sending device and the receiving device, ({tilde over (h)}h·{tilde over (h)}) or ({tilde over (h)}·{tilde over (h)}h) is a diagonal matrix, and {tilde over (h)} is related to a transmission distance d between the sending device and the receiving device and an element spacing of an antenna of the receiving device; and sending, by the sending device, a signal to the receiving device according to the target precoding matrix v.
Huawei Technologies Co. , Ltd.

Techniques for determining uplink precoding matrix for a user equipment

Certain aspects of the present disclosure provide techniques for determining precodings of signals transmitted in a wireless communications system. According to certain aspects, a method of wireless communication by a user equipment (ue) is provided.
Qualcomm Incorporated

Method and controlling uplink transmission on discontinuous reception operation in wireless communication system

A method for controlling uplink transmissions on discontinuous reception (drx) operation, by a wireless device, in a wireless communication system, the method includes configuring a channel quality indicator (cqi) masking which indicates that channel state information is to be reported on a physical uplink control channel (pucch) while an ondurationtimer is running; determining, at a first subframe prior to a second subframe, whether or not the ondurationtimer is to be running at the second subframe according to whether or not a physical downlink control channel (pdcch) is received at the first subframe; and controlling the uplink transmissions so as not to report the channel state information on the pucch at the second subframe if the ondurationtimer is determined, at the first subframe, to be not running at the second subframe, wherein the channel state information includes at least one of a cqi, a precoding matrix index (pmi).. .
Lg Electronics Inc.

Signal generating method and signal generating device

A transmission method for transmitting a first modulated signal and a second modulated signal in the same frequency at the same time. Each signal has been modulated according to a different modulation scheme.
Sun Patent Trust

Enhanced csi procedures for fd-mimo

Enhanced channel state information (csi) procedures for full dimension-multiple input, multiple output (fd-mimo) is discussed in which a number of csi reference signal (csi-rs) ports configured for a user equipment (ue) is determined. In response to the csi-rs ports including both horizontal and vertical ports, the ue may determine a first precoding matrix from a plurality of precoding matrices constructed by a kronecker product of a horizontal precoding matrix and a vertical precoding matrix.
Qualcomm Incorporated

Method, user equipment and base station for determining precoding matrix indicator

The present disclosure discloses a method, a user equipment and a base station for determining a pmi. The method includes: receiving a reference signal set sent by a base station; based on the reference signal set, selecting a precoding matrix from a codebook, the codebook at least including a non-constant modulus precoding matrix, the non-constant modulus precoding matrix at least including a non-constant modulus column vector, amplitude values of at least two elements of the non-constant modulus column vector forming a symmetrical sequence; and sending a pmi to the base station, the pmi corresponding to the selected precoding matrix.
Huawei Technologies Co., Ltd.

Codebook design and structure for advanced wireless communication systems

A base station capable of communicating with a user equipment (ue) includes a transceiver configured to transmit channel state information-reference signal (csi-rs) according to a csi-rs configuration comprising a number of antenna ports, and downlink signals containing the csi-rs configuration and a precoding-matrix-construction configuration for precoding matrix indicator (pmi) reporting on physical downlink shared channels (pdsch), the precoding-matrix-construction configuration comprising a first and second sampling factors, o1 and o2, and a first and second numbers, n1 and n2 receive, from the ue, uplink signals containing a precoding matrix indicator (pmi) derived using the csi-rs according to the precoding-matrix-construction configuration, a controller configured to convert the pmi to one of predetermined precoding matrices.. .
Samsung Electronics Co., Ltd.

Method and feedback in multi-user multiple-input multiple-output (mu-mimo) communication system

Provided is a feedback method and apparatus in a multiple-input multiple-output (mimo) communication system. A terminal may determine a preferred pre-coding matrix for a neighboring terminal, based on a reference rank determined by a base station and a preferred pre-coding matrix of the terminal.
Samsung Electronics Co., Ltd.

Hybrid beamforming multi-antenna wireless systems

This invention presents methods for mu-mimo wireless communication systems comprising a bs with plural of antennas placed as a linear array or planar array, plural of ues, for conducting two-level signal processing at the bs to reduce the system implementation complexity, i.e., the rf precoding/combination and the baseband precoding/detection, for the bs to obtain the second-order statistical information of the channel matrix of each ue to computing the rf precoding matrix through a much smaller number of pilots than that of the transceiving antennas at the bs, where the second-order statistical information of the channel matrix can be obtained through the uplink reference signals or downlink reference signals plus uplink feedback.. .
Rf Dsp Inc.

Precoding and feedback channel information in wireless communication system

The present invention relates to precoding and feedback channel information in wireless communication system. A method includes receiving a first precoding matrix index (pmi) and a second pmi from a terminal; mapping one or two codewords into layers; precoding symbols mapped into the layers using a first precoding matrix derived from the first pmi and a second precoding matrix derived from the second pmi; and transmitting the precoded symbols to the terminal, wherein the reception of the first pmi is less frequent than the reception of the second pmi..
Goldpeak Innovations Inc

Signal generating method and signal generating device

A transmission method of simultaneously transmitting a first modulated signal and a second modulated signal at a common frequency performs precoding on both signals using a fixed precoding matrix and regular ly changes the phase of at least one of the signals. One of signal generation processing in which phase change is performed and signal generation processing in which phase change is not performed is selectable, thereby improving general versatility in signal generation..
Sun Patent Trust

Signal generation method and signal generation device

A transmission method simultaneously transmitting a first modulated signal and a second modulated signal at a common frequency performs precoding on both signals using a fixed precoding matrix and regularly changes the phase of at least one of the signals, thereby improving received data signal quality for a reception device.. .
Sun Patent Trust

Method for reporting channel state information, user equipment, and base station

Embodiments of the present invention provide a method includes: receiving a reference signal sent by abase station; selecting, based on the reference signal, a precoding matrix from a codebook, where a precoding matrix w included in the codebook is a product of three matrices being w1, z, and w2, that is, w=w1zw2, where both w1 and z are block diagonal matrices, w1=a formula (i), z=a formula (ii), each of w1 and z includes at least one block matrix, that is, nb≧1, and each column of each block matrix zi in the matrix z has the following structure formula (iii); and sending a precoding matrix indicator (pmi) to the base station, where the pmi corresponds to the selected precoding matrix, and is used by the base station to obtain the selected precoding matrix w according to the pmi.. .
Huawei Technologies Co., Ltd.

Massive digital-analog hybrid antenna, channel state information feedback method and channel state information feedback device

The present disclosure provides a massive digital-analog hybrid antenna, a csi feedback method and a csi feedback device. The csi feedback method includes: at an analog precoding matrix selection stage of an analog precoding period, transmitting, by a base station, a precoded downlink reference signal and receiving first-stage csi and measurement information fed back by a ue on a subframe corresponding to each time offset; selecting, by the base station, a target analog precoding matrix in accordance with performance measurement values of analog precoding matrices corresponding to all p time offsets; and at a target analog precoding matrix using stage of the analog precoding period, transmitting, by the base station, the downlink reference signal precoded by the target analog precoding matrix and receive second-stage csi fed back by the ue on each predetermined subframe..
China Academy Of Telecommunications Technology

Beamforming using an antenna array

There is provided mechanisms for beamforming using an antenna array. A method is performed by a network node.
Telefonaktiebolaget Lm Ericsson (publ)

Radio communication control method and radio communication system

A communication control method includes: for each of plurality of receivers ue, calculating excluding channel matrices that include a plurality of equivalent channel matrices acquired by multiplying a transmit bf weight matrix corresponding to that receiver ue by each of a plurality of channel matrices corresponding to receivers ue other than that receiver ue, acquiring a first eigenvector that is included in a right-singular matrix obtained from single value decomposition of the excluding channel matrices, the first eigenvector corresponding to a noise subspace of the excluding channel matrices, acquiring a second eigenvector that is included in a right-singular matrix obtained from single value decomposition of a product of an equivalent channel matrix including the transmit bf weight matrix corresponding to that receiver ue and the first eigenvector, the second eigenvector corresponding to a signal subspace of the product, and obtaining a precoding matrix corresponding to that receiver ue by multiplying the first eigenvector by the second eigenvector.. .
Ntt Docomo, Inc.

System and providing interference parameter estimation for multi-input multi-output (mimo) communication system

A method and apparatus are provided. The method includes receiving a desired signal from a serving base station, receiving a plurality of interfering signals from one or more base stations, estimating a maximum likelihood (ml) decision metric of interfering signals, applying a logarithm function to the ml decision metric, and applying a maximum-log approximation function to a serving data vector and an interference data vector, which are included in the ml decision metric, determining the values of a transmit power, a rank, a precoding matrix, a modulation order and a transmission scheme using the applied ml decision metric, and cancelling the interfering signals from the received signals using the determined values of transmit power, rank, precoding matrix, modulation order and transmission scheme..
Samsung Electronics Co., Ltd.

Method for transmitting channel state information in wireless access system

A method for channel state information (csi) reporting in a wireless access system which supports a carrier aggregation, the method performed by a user equipment (ue) includes measuring a first type csi for a first component carrier (cc) of two or more downlink (dl) ccs; measuring a second type csi for a second cc of the two or more downlink (dl) ccs; and reporting the first type csi only, when a collision of a report of the first type csi with a report of the second csi type is occurred in a same subframe, wherein the first type csi includes (1) a rank indicator (ri) and a first precoding matrix indicator (pmi), (2) only the ri, or (3) only the first pmi, and wherein the second type csi includes (1) only a subband (sb) cqi or (2) the sb-cqi and a second pmi.. .
Lg Electronics Inc.

Method and managing control channel in a mobile communication system using mulitiple antennas

Methods and apparatuses are provided for receiving control information by a terminal. A control channel message is received on a control channel.
Samsung Electronics Co., Ltd.

Codebook design and structure for advanced wireless communication systems

A base station (bs) capable of communicating with a user equipment (ue) includes a transmitter configured to transmit, to the ue, downlink signals including precoding matrix indicator (pmi) codebook parameters comprising: first and second quantities of antenna ports, n1 and n2, indicating respective quantities of antenna ports in first and second dimensions of a dual-polarized antenna array at the bs; first and second oversampling factors, o1 and o2, indicating respective oversampling factors for discrete fourier transform (dft) beams in the first and second dimensions; and a beam group configuration among a plurality of beam group configurations. The bs also includes a receiver configured to receive uplink signals including a plurality pmis from the ue determined using a pmi codebook corresponding to the transmitted pmi codebook parameters; and determine a precoder using the received pmis.
Samsung Electronics Co., Ltd

Method and apparatus of controlling periodic csi reporting

Exemplary embodiments of the present invention relates to an apparatus and method for performing periodic csi reporting available in a system supporting a tdd-fdd aggregation operation and an fdd-tdd aggregation operation. A periodicity and an offset for periodic reporting of channel quality indicator and precoding matrix inidcator may be determined based on the cell type of a primary serving cell for a tdd-fdd carrier aggregation and an fdd-tdd carrier aggregation..

Data transmission method, apparatus, and device

Embodiments of the present invention provide a data transmission method, apparatus, and device, so as to improve efficiency in utilizing a time-frequency resource. The method includes: determining, by a transmit end device, a signature matrix s according to a quantity l of layers of a data stream and a quantity r of receive antennas used by a receive end device; determining, by the transmit end device, a precoding matrix p according to a channel matrix h and the signature matrix s, and performing precoding processing on the l-layer data stream according to the precoding matrix p; and sending, by the transmit end device to the receive end device, the l-layer data stream on which the precoding processing has been performed and information used to indicate the signature matrix s..
Huawei Technologies Co., Ltd.

Method and system for enabling resource block bundling in lte-a systems

A base station includes a transmit path circuitry to transmit an indication of whether a subscriber station is configured with precoding matrix indicator/rank indicator (pmi/ri) reporting. The transmit path circuitry sets a pre-coding granularity to multiple physical resource blocks in the frequency domain to perform a same pre-coding over a bundled resource block if the subscriber station is configured with pmi/ri reporting.
Waterwise Gardening Llc

Method and transmitting channel state information

A method for transmitting channel status information of a user equipment (ue) in a wireless communication system. The ue reports first channel information to a base station periodically; and reports second channel information to the base station periodically.
Lg Electronics Inc.

Method and transmitting uplink signals using multi-antenna

A method and apparatus for allowing a ue to transmit uplink signals using a mimo scheme are disclosed. In order to maintain good peak power to average power ratio (papr) or cubic metric (cm) properties when the ue transmits uplink signals using the mimo scheme, the ue uses a precoding scheme based on a precoding matrix established in a manner that one layer is transmitted to each antenna in specific rank transmission..
Lg Electronics Inc.

Transmission method, transmitter apparatus, reception method and receiver apparatus

Transmission quality is improved in an environment in which direct waves dominate in a transmission method for transmitting a plurality of modulated signals from a plurality of antennas at the same time. All data symbols used in data transmission of a modulated signal are precoded by hopping between precoding matrices so that the precoding matrix used to precode each data symbol and the precoding matrices used to precode data symbols that are adjacent to the data symbol in the frequency domain and the time domain all differ.
Sun Patent Trust

Cell measurement method and terminal

The present disclosure provides a cell measurement method and a terminal. The cell measurement method includes steps of: measuring a pilot signal from a to-be-measured cell, so as to acquire an channel estimation of n pilot signal transmission ports of the to-be-measured cell, n≧1; determining an equivalent received power corresponding to each precoding matrix in accordance with each precoding matrix in a set of precoding matrices and the channel estimation of the n pilot signal transmission ports of the to-be-measured cell; and determining an equivalent received power of the to-be-measured cell in accordance with the equivalent received power corresponding to each precoding matrix..
China Academy Of Telecommunications Technology

Method for performing pre-coding using codebook in wireless communication system and apparatus therefor

A method for performing, by a ue, precoding using a codebook in a wireless communication system includes: receiving a reference signal for channel estimation from an enb; estimating a channel through the received reference signal; determining a precoding matrix related to the estimated channel in a codebook; and feeding back, to the enb, a precoding matrix index (pmi) corresponding to the determined precoding matrix, wherein the codebook is generated in consideration of at least one of a region to which the ue belongs and the position of the ue.. .
Sogang University Research Foundation

4tx codebook enhancement in lte

Channel state information (csi) feedback in a wireless communication system is disclosed. A precoding matrix is generated for multi-antenna transmission based on precoding matrix indicator (pmi) feedback, wherein the pmi indicates a choice of precoding matrix derived from a matrix multiplication of two matrices from a first codebook and a second codebook.
Texas Instruments Incorporated

Apparatus and transceiving channel state information

A method of an evolved node b (enb) in a wireless environment is provided. The method includes receiving, from a user equipment (ue), a plurality of channel state information (csi) feedback respectively corresponding to a plurality of csi processes that are respectively allocated a plurality of precoding matrix indexes (pmis), determining a modulation and coding scheme (mcs) value based on the plurality of received csi feedback, and transmitting, to the ue, data modulated based on the determined mcs value by cyclically using the plurality of pmis, wherein the plurality of csi feedback may each include information on a channel quality indication (cqi) as to a pmi allocated to a csi process corresponding to each of the plurality of csi feedback..
Samsung Electronics Co., Ltd.

Method and estimating channel in wireless communication system

The present invention relates to a wireless communication system. A method for estimating a channel by a user equipment (ue) in a wireless communication system includes receiving information about at least one channel station information (csi) configuration for reporting csi of one of a plurality of serving cells, determining that the same precoding matrix is applied to a plurality of resource blocks when all of the at least one csi configuration is configured to report a precoding matrix indicator (pmi) and a rank indicator (ri), and determining that the precoding matrix is applied to one resource block when csi configuration configured not to report the pmi and the ri is present among the at least one csi configuration, and estimating a channel based on a result of the determination..
Lg Electronics Inc.

Signal transmission method and apparatus using codebook in wireless communication system supporting multiple antennas

The present invention relates to a method for transmitting, by a base station, a downlink signal using a plurality of transmission antennas comprises the steps of: applying a precoding matrix indicated by the pmi, received from a terminal, in a codebook to a plurality of layers, and transmitting the precoded signal to the terminal through a plurality of transmission antennas. Among precoding matrices included in the codebook, a precoding matrix for even number transmission layers can be a 2×2 matrix containing four matrices (w1s), the matrix (w1) having rows of a number of transmission antennas and columns of half the number of transmission layers, the first and second columns of the first row in the 2×2 matrix being multiplied by 1, the first column of the second row being multiplied by coefficient “a” of a phase, and the first column of the second row being multiplied by “−a”..
Lg Electronics Inc.

Channel feedback for coordinated multi-point transmission

A method of coordinated multipoint (comp) communication between a base station having a plurality of points with at least one user equipment (ue). At least one ue receives at least one transmission from the base station having the plurality of points.
Texas Instruments Incorporated

Method and terminal for handling channel state information

Provided in embodiments of the present application are a method and terminal for handling channel state information (csi). The embodiments use the terminal to measure and report to a base station first csi, where the first csi comprises a first rank indicator (ri), a first precoding matrix indicator (pmi), and a first channel quality indicator (cqi), to acquire a second ri and/or a second pmi on the basis of the first csi.
Huawei Technologies Co., Ltd.

Pmi reporting for a set of ports

There is provided mechanisms for precoding matrix indicator (pmi) reporting for a set of ports. A method is performed by a wireless device.
Telefonaktiebolaget Lm Ericsson (publ)

Data transmission method, transmit end device, and receive end device

The present disclosure discloses a data transmission method, a transmit end device, and a receive end device. The method includes performing bit mapping processing on a first part of bits of a first data bit group, to generate a first modulation symbol and determining a first precoding matrix from multiple preset precoding matrices according to a second part of bits of the first data bit group.
Huawei Technologies Co., Ltd.

Method for transmitting 4-antenna precoding matrix, user equipment and base station

Embodiments disclose a method for transmitting a 4-antenna precoding matrix, a user equipment, and a base station. The method includes determining a rank used for indicating the number of transmission layers, determining a first precoding matrix in a codebook set corresponding to the rank, determining a first pmi and a second pmi used for indicating the first precoding matrix, and sending the first pmi and the second pmi used for indicating the first precoding matrix to a base station..
Huawei Technologies Co., Ltd.

Grouping user equipment based on precoding matrix indicators for combined transmission

The present disclosure enables a base station to group ues based on similar pmis for a combined transmission. The apparatus may receive a plurality of pmis from a plurality of ues.
Qualcomm Incorporated

Beamforming signaling in a wireless network

Methods, apparatus, and systems for wireless communications are described. Example methods, devices, and systems are described that utilize a precoding matrix indicator (pmi) computed based at least in part on first signals received via a first cell and on second signals received via a second cell.
Comcast Cable Communications, Llc

Method for feeding backchannel state information, user equipment, and base station

Embodiments of the present invention provide a method for feeding back channel state information, a user equipment, and abase station, to improve feedback precision of channel state information. The method includes: receiving a reference signal sent by a base station; selecting a precoding matrix w from a codebook according to the reference signal, where a column vector of the precoding matrix w may be expressed as α[v ejφv]t, v=[1 ejθ]; and sending a precoding matrix indicator pmi to the base station, where the pmi is corresponding to the selected precoding matrix w.
Huawei Technologies Co., Ltd.

Enhanced csi feedback for fd-mimo

Enhanced channel state information (csi) feedback is disclosed for full dimensional multiple input, multiple output (fd-mimo) operations. In one aspect, a single csi process is defined that is configured with an azimuth and elevation csi-reference signal (rs) ports.
Qualcomm Incorporated

Codebook construction

A method implemented in a base station used in a wireless communications system is disclosed. The method comprises having 1-layer, 2-layer, 3-layer, and 4-layer codebooks for 4 transmit antenna (4tx) transmission, each codebook including a plurality of precoding matrices, precoding data with one of the plurality of precoding matrices, and transmitting, to a user equipment, the precoded data, wherein each of the 1-layer and 2-layer codebooks comprises a first codebook and a second codebook, and wherein each precoding matrix in the first codebook comprises a first index and a second index.
Nec Corporation

Method and enabling uplink mimo

Methods and apparatuses enabling uplink multiple-input multiple-output (mimo) are provided. A user equipment (ue) includes a transceiver and a processor operably connected to the transceiver.
Samsung Electronics Co., Ltd

Method for reporting channel state and apparatus therefor

A method for reporting a channel state for a downlink channel according to an embodiment of the present invention, which is performed by a terminal, may comprise the steps of: receiving, from a base station, restriction information on a precoding matrix in a code book, wherein the restriction information on the precoding matrix is represented by one or more bit values; calculating a channel state value for the downlink channel using the limitation information, and transmitting the calculated channel state value to the base station.. .
Lg Electronics Inc.

Precoding matrix indicator pmi feedback method

In a 3d mimo scenario with 16 antenna ports, antenna ports can be extended in different directions because of different configuration manners of the antenna ports. An apparatus and method where different antenna port counting manners are determined in different configurations are provided, so that in different configurations, a matrix whose dimension is 8 and a matrix whose dimension is 2 are determined in a precoding codebook, and a value of a pmi is fed back to indicate a precoding matrix..
Huawei Technologies Co., Ltd.

Communication system and channel estimating method thereof

A communication system includes at least one transmitting unit and at least one receiving unit. The at least one transmitting unit is configured to transmit at least one input signal after precoding it with at least one precoding matrix.

Method and efficient precoding information validation for mimo communications

A method and apparatus for efficient precoding matrix verification in a multiple-input multiple-output mimo wireless communication system are disclosed. A wireless transmit/receive unit wtru sends a precoding matrix index pmi to an enodeb.
Interdigital Technology Corporation

Precoding information collection method and transmission device

Embodiments of the present invention disclose a precoding information collection method and a transmission device and relate to the communications field. A specific solution is: precoding, by a transmit side, a first pilot signal according to a first precoding matrix, and sending a precoded first pilot signal to a receive side, where the first precoding matrix is the same as a precoding matrix used for current data transmission; precoding, by the transmit side, n second pilot signals according to n second precoding matrices, and sending n precoded second pilot signals to the receive side, where n is an integer greater than or equal to 1, the second precoding matrices used for precoding the second pilot signals are different from each other, and the n second precoding matrices are different from the first precoding matrix; and receiving, by the transmit side, precoding feedback information sent by the receive side..
Huawei Technologies Co., Ltd.

Device and generating precoding matrix, and storage medium

The disclosure discloses a device for generating a precoding matrix. The device includes: a parameter calculator, a counter and an element generating module.
Sanechips Technology Co., Ltd.

Method and configuring channel quality indicator and configuring modulation and coding scheme

A method for configuring a user equipment (ue) with a channel quality index (cqi) table, the method includes: calculating a precoding matrix indicator (pmi) and rank indication (ri) according to a channel estimated result; determining a configured cqi index table according to received cqi index table indication information transmitted by a base station, the base station configuring the cqi index table by selecting the cqi index table from at least two cqi index tables; and calculating a cqi index according to the calculated pmi and the ri using the configured cqi index table.. .
Fujitsu Limited

Data processing method, apparatus, and device

A data processing method, including performing, by a transmit end device, mapping processing on l layers of information bits to generate l layers of modulation symbol sequences, where each layer of modulation symbol sequence includes u modulation symbols, the l layers of modulation symbol sequences correspond to a same time-frequency resource, and the u modulation symbols include at least one non-zero modulation symbol and at least one zero modulation symbol, performing precoding processing on each layer of modulation symbol sequence according to a precoding matrix to generate l layers of modulation symbol sequence matrixes, and performing superposition processing on the l layers of modulation symbol sequence matrixes to generate a to-be-sent symbol sequence matrix, where the to-be-sent symbol sequence matrix includes t element sequences in a first dimension, and the to-be-sent symbol sequence matrix includes u element sequences in a second dimension.. .
Huawei Technologies Co., Ltd.

Precoder codebook for csi reporting in advanced wireless communication systems

A method for a channel state information (csi) feedback in an advanced communication system. The method comprises receiving, from a base station (bs), csi feedback configuration information for a precoding matrix indicator (pmi) feedback using a higher layer signaling, wherein the csi feedback configuration information includes a combination of an oversampling factor (o1, o2) and a dual polarized csi reference signal (csi-rs) antenna port layout (n1, n2), and wherein subscripts 1 and 2 stand for a first dimension and a second dimension, respectively, and a number of dual polarized csi-rs ports p=2n1n2.
Samsung Electronics Co., Ltd

Method and mtc device for receiving downlink control channel

Provided is a method for receiving a downlink control channel in a machine type communication (mtc) device configured to operate only in a part of a band among system bands of a cell. A method for receiving a downlink control channel can comprise the steps of: determining a precoding matrix index (pmi) applied to a downlink control channel receivable only in a part of a band; receiving from a cell the downlink control channel in the part of the band in a data area of a subframe; and decoding the downlink control channel, which has been received from the cell, on the basis of the determined pmi..
Lg Electronics Inc.

Fbmc transmit diversity transmission method, transmit end apparatus, and receive end apparatus

The present invention provides an fbmc transmit diversity transmission method and apparatus. The method includes: obtaining a to-be-transmitted data sequence, where the to-be-transmitted data sequence includes 2*m*n pieces of data; performing transmit diversity processing on the to-be-transmitted data sequence to obtain fbmc signals of a first antenna and a second antenna, where a precoding matrix is (i) or (ii), a matrix that includes the fbmc signals of the first antenna and the second antenna is (iii), a matrix that includes the to-be-transmitted data sequence is (iv), 0≦i≦m−1, 0≦j≦n−1, y=wx, the 2*m*n pieces of data of the to-be-transmitted data sequence are denoted by x(0)(k,l) and x(1)(k,l), 0≦k≦m−1, 0≦l≦n−1, fbmc signals of the first antenna and the second antenna on an rth subcarrier and an sth symbol are denoted by y(0)(r,s) and y(1)(r,s), 0≦r≦2m−1, and 0≦s≦n−1; and transmitting the fbmc signals of the first antenna and the second antenna..
Huawei Technologies Co., Ltd.

User equipment and methods for codebook subsampling for enhanced 4tx codebooks

Embodiments of user equipment (ue) and methods for codebook subsampling for enhanced 4tx codebooks in 3gpp lte wireless networks are generally described herein. In some embodiments, a physical uplink control channel (pucch) is configured for transmission of channel state information (csi) feedback including a rank indicator (ri) and a precoding matrix (w1).
Intel Ip Corporation

Resource configuration method, user equipment, and base station

According to a resource configuration method, user equipment, and a base station that are provided in embodiments of the present invention and relate to the communications field, reference signals used for measurement and overheads of corresponding measurement and feedback are reduced. A specific solution is as follows: a base station sends m reference signals to ue in n time units in a time unit set, where the reference signal is used by the ue to perform channel quality measurement, and each reference signal in the m reference signals is corresponding to one piece of precoding matrix information; receives channel quality indication information sent by the ue..
Huawei Technologies Co., Ltd.

Method and device for efficient precoder search

The disclosure relates to a method performed in a wireless device for establishing a feedback metric. The wireless device is configured with a grouping of available precoding matrix indicators, pmis, of a codebook, the grouping comprising two or more groups each of which comprises an exclusive subset of the available precoding matrix indicators, pmis.
Telefonaktiebolaget Lm Ericsson (publ)

System and two-way relaying with beamforming

A system and method for two-way relaying with beamforming are provided. A method for relay operations includes estimating communications channels between a relay and communications devices coupled to the relay, storing data contained in the transmissions, storing data contained in the transmissions, precoding a transmission including a subset of the stored data with a precoding matrix, and transmitting the precoded transmission.
Futurewei Technologies, Inc.

Method and performing effective feedback in wireless communication system supporting multiple antennas

A method for transmitting channel status information (csi) of downlink multi-carrier transmission includes generating the csi including at least one of a rank indicator (ri), a first precoding matrix index (pmi), a second pmi and a channel quality indicator (cqi) for one or more downlink carriers, the cqi being calculated based on precoding information determined by a combination of the first and second pmis, determining, when two or more csis collide with one another in one uplink subframe of one uplink carrier, a csi to be transmitted on the basis of priority, and transmitting the determined csi over a uplink channel. If a csi including an ri or a wideband first pmi collides with a csi including a wideband cqi or a subband cqi, the csi including a wideband cqi or a subband cqi has low priority and is dropped..
Lg Electronics Inc.

Data transmission method, base station and user equipment

A data transmission method, a base station, and user equipment are presented. The method includes performing rotation processing on a preset precoding matrix; performing precoding processing on to-be-sent information according to a precoding matrix obtained after the rotation processing; and sending to-be-sent information obtained after the precoding processing.
Huawei Technologies Co., Ltd.

Method and blind detection of interference parameters in lte system

A method and an apparatus. The method includes receiving a signal including a serving signal and an interference signal; applying a gaussian approximation (ga) on the serving signal and the interference signal; determining, jointly, a maximum likelihood (ml) solution of rank, traffic to pilot ratio (tpr), and precoding matrix index on the ga-applied serving signal and the ga-applied interference signal.
Samsung Electronics Co., Ltd.

Pmi selection

A method for selecting a precoding matrix indicator that optimizes a retransmission is disclosed. The method comprises causing a transmission initially, with an initial rank, on two codewords, by a base station to at least one user equipment in a wireless network.
Nokia Solutions And Network Oy

Communication system and method, base station, and user terminal

Provided a method in a mobile communication system comprising a base station adapted to create a precoding matrix for applying to data to be transmitted to a user terminal by using a channel estimate determined from a reference signal (rs) transmitted from the user terminal to the base station, the user terminal being adapted to transmit to the base station a channel state information (csi) report, wherein the method comprises: the base station creating a relationship between the received csi report and interference pluses noise covariance matrix that reflects amount of interference and noise observed at the user terminal's antennas, the base station determining the interference pluses noise covariance matrix based on the created relationship, and the base station using the determined interference pluses noise covariance matrix to estimate sinr for each data layer conditioned on the precoding matrix.. .
Nec Corporation

Method of signal generation and signal generating device

A transmission method simultaneously transmitting a first modulated signal and a second modulated signal at a common frequency performs precoding on both signals using a fixed precoding matrix and regularly changes the phase of at least one of the signals, thereby improving received data signal quality for a reception device.. .
Sun Patent Trust

Transmission method, transmitter apparatus, reception method and receiver apparatus

Transmission quality is improved in an environment in which direct waves dominate in a transmission method for transmitting a plurality of modulated signals from a plurality of antennas at the same time. All data symbols used in data transmission of a modulated signal are precoded by hopping between precoding matrices so that the precoding matrix used to precode each data symbol and the precoding matrices used to precode data symbols that are adjacent to the data symbol in the frequency domain and the time domain all differ.
Sun Patent Trust

Communication method and apparatus using beamforming in a wireless communication system

A communication method and an apparatus using beamforming in a wireless communication system are provided. The communication method includes determining a candidate user set including one or more mobile stations (mss), for multiple user-multiple input multiple output (mu-mimo) transmission, transmitting beam information indicating best base station (bs) transmission beams of the mss of the candidate user set to the mss of the candidate user set, receiving precoding matrix index (pmi) information indicating a pmi to be used for baseband precoding from each of the mss of the candidate user set, the pmi information being determined based on the beam information, and transmitting a signal precoded based on the pmi information to at least one ms..
Samsung Electronics Co., Ltd.

Feedback reporting 3d beamforming in wireless communication system, and apparatus therefor

Disclosed in the present application is a method for a receiving end to report feedback information to a transmitting end in a wireless communication system. Specifically, the method comprises receiving, from a base station, a plurality of reference signals corresponding to a two-dimensional antenna array; determining the number of horizontal antenna ports and the number of vertical antenna ports which reflect the mobility of a receiving end, by using the horizontal channel and the vertical channel estimated based on the plurality of reference signals; calculating a horizontal dimensional control matrix and a vertical dimensional control matrix by using the determined numbers of horizontal antenna ports and vertical antenna ports; determining and reporting a horizontal precoding matrix, a vertical precoding matrix, and a three-dimensional channel link by using the horizontal dimensional control matrix, the vertical dimensional control matrix, the horizontal channel and the vertical channel..
Lg Electronics Inc.

Transmission method and apparatus in a wireless communication system in which a cell includes a plurality of subcells

A transmission method and apparatus are provided for use in a wireless communication system in which a cell includes a plurality of sub-cells. A transmission point (tp) in the wireless communication system includes a transmitter configured to transmit a signal to each of the plurality of sub-cells through a plurality of antennas; a receiver configured to receive uplink control information from a user equipment (ue) located within at least one of the plurality of sub-cells; and a controller configured to determine a virtual matrix for each of the plurality of sub-cells, to select a precoding matrix according to the virtual matrices of the plurality of sub-cells, to determine a cooperative transmission mode or a normal transmission mode, based on the received uplink control information, and to control the transmitter to perform downlink transmission on a sub-cell basis through the virtual matrices of the sub-cells according to the determined transmission mode..
Samsung Electronics Co., Ltd.

Method and device for transmitting channel state information in wireless communication system

The present invention relates to a wireless communication system. A method for transmitting channel state information (csi) in a wireless communication system, according to one embodiment of the present invention, comprises steps of: subsampling a codebook for a four-antenna port including 16 precoding matrices; and performing feedback for the csi on the basis of a subsampled codebook, wherein when a rank indicator (ri) is four, a subsampled codebook includes, from 16 precoding matrices, a first precoding matrix having index 0, a third precoding matrix having index 2, a ninth precoding matrix having index 8, and an eleventh precoding matrix having index 10..
Lg Electronics Inc.

Uplink power control method and apparatus

Embodiments provide an uplink power control method and an apparatus. The uplink power control method in the present invention includes: receiving a measurement pilot configured by a network device, where the measurement pilot is corresponding to information about a precoding matrix; and receiving a power control parameter configured by the network device, where the power control parameter is corresponding to the configured measurement pilot, and the power control parameter is used by user equipment ue to control transmit power of the ue in a serving cell..
Huawei Technologies Co., Ltd.

Device and transmitting feedback information in wireless communication system

The present disclosure relates to a pre-5th-generation (5g) or 5g communication system to be provided for supporting higher data rates beyond 4th-generation (4g) communication system such as long term evolution (lte). A terminal in a wireless communication system according to an embodiment of the present invention comprises: a controller for determining a first size corresponding to a number of bits allocated for a first pmi (precoding matrix indicator) and a second size corresponding to a number of bits allocated for a second pmi; and a transmitting unit for transmitting feedback information, including the first pmi corresponding to the first size and the second pmi corresponding to the second size, to a base station..
Samsung Electronics Co., Ltd.

Method and measuring channel variation for massive antenna array based beamforming in wireless communication system

A method for transmitting feedback information to a base station at a user equipment (ue) in a wireless communication system. The method includes receiving a pilot signal from the base station at a first time and a second time, selecting a first pre-coding matrix index corresponding to the first time and a second precoding matrix index corresponding to the second time from a predetermined codebook based on the pilot signal, and transmitting the feedback information including information about a variation value between the first precoding matrix index and the second precoding matrix index to the base station..
Lg Electronics Inc.

Method for estimating channel and device therefor

A method for reporting a channel state of a downlink channel transmitted through two-dimensionally arranged nt number of antenna ports, according to one embodiment of the present disclosure, is performed by a terminal, and the method comprises the steps of: receiving a reference signal (rs) configuration for measuring a channel for the two-dimensionally arranged nt number of antenna ports, wherein the rs is code division multiplexed (cdm) and is transmitted through the nt number of antenna ports; and receiving the rs by using the received rs configuration, and calculating channel state information on a downlink channel so as to report the channel state information to a serving cell, wherein the reported channel state information includes a precoding matrix for the transmission of the rs, and the precoding matrix for the transmission of the rs can be subset of a codebook for a precoding matrix for the data transmission of the nt number of antenna ports.. .
Lg Electronics Inc.

Method and calculating feedback information for 3d mimo in wireless communication system

Disclosed herein is a method for generating channel state information at a user equipment (ue) for multiple input multiple output (mimo) based beamforming in a wireless communication system. The method includes receiving a first pilot pattern and a second pilot pattern from a base station, selecting a precoding matrix index (pmi) and a rank indicator (ri) for each of the first pilot pattern and the second pilot pattern, configuring the ri for the first pilot pattern as an ri for a three-dimensional (3d) channel, wherein the ri for the first pilot pattern is larger than the ri for the second pilot pattern; and reselecting a pmi of the second pilot pattern on the assumption that the ri of the second pilot pattern is equal to the ri for the 3d channel and the pmi of the first pilot pattern is equal to a preselected pmi..
Lg Electronics Inc.

Method for reporting channel state, and device therefor

According to one embodiment of the present invention, a method for reporting a channel state of a downlink channel transmitted through two-dimensionally arranged nt number of antenna ports is carried out by a terminal, wherein the method comprises the steps of: configuring each of the nt number of antenna ports to be mapped to all antenna elements belonging to a specific antenna element group, and each antenna port of an antenna port group corresponding to a reference signal (rs), which is transmitted in the same ofdm symbol, to be mapped to different antenna element groups from each other, and receiving a channel state information (csi)-rs configuration for reporting a channel state for the antenna port group; and calculating channel state information on a downlink channel through a csi-rs received using the received csi-rs configuration, and reporting, to a serving cell, the calculated channel state information, wherein the reported channel state information can contain a precoding matrix for selecting an antenna port group and a precoding matrix to be applied to the selected antenna port group.. .
Lg Electronics Inc.

Precoding method, information sending method, and apparatuses thereof

Embodiments of the present application disclose a precoding method, an information sending method, and apparatuses thereof. The precoding method comprises: acquiring first information associated with a receiving matrix of at least one user equipment associated with a base station; and determining a first transmitting precoding matrix of the base station according to at least the receiving matrix of the at least one user equipment.
Beijing Zhigu Rui Tuo Tech Co., Ltd.

Method and determining precoding matrix indicator, user equipment, and base station

The present invention provides a method and an apparatus for determining a precoding matrix indicator, user equipment, and a base station. The method includes: determining a precoding matrix indicator pmi, where the pmi corresponds to a precoding matrix w, and the precoding matrix w satisfies a first condition, a second condition, or a third condition; and sending the pmi to a base station.
Huawei Technologies Co., Ltd.

Method and efficient feedback in a wireless communication system supporting multiple antenna

A method for transmitting channel status information (csi) via uplink in a wireless communication system includes transmitting a first precoding matrix indicator (pmi) and a second pmi at a subframe. A subsampled codebook for each of a precoding codebook for rank-1 and a precoding codebook for rank-2 is determined based on at least the first pmi or the second pmi.
Lg Electronics Inc.

Multi-user multiplexing method, base station, and user terminal

A multi-user multiplexing method, a base station, and a user terminal are disclosed. The method includes: a base station weights, using a precoding matrix, multiple data streams to obtain to-be-transmitted data streams mapped onto k physical transmit antennas; weights, using the precoding matrix, a pilot signal to obtain to-be-transmitted pilot signals mapped onto the k physical transmit antennas; and sends the to-be-transmitted data streams and the to-be-transmitted pilot signals to the n user terminals by using the k physical transmit antennas.
Huawei Technologies Co., Ltd.

Signal generating method and signal generating device

A transmission method for transmitting a first modulated signal and a second modulated signal in the same frequency at the same time. Each signal has been modulated according to a different modulation scheme.
Sun Patent Trust

Signal generation method and signal generation device

A transmission method simultaneously transmitting a first modulated signal and a second modulated signal at a common frequency performs precoding on both signals using a fixed precoding matrix and regularly changes the phase of at least one of the signals, thereby improving received data signal quality for a reception device.. .
Sun Patent Trust

Transmission device and transmission method

A transmission device comprising: a weighting circuity which, in operation, generates transmission signals of n streams (n is an integer of 3 or more) by weighting modulated signals of the n streams using a predetermined fixed precoding matrix; a phase changing circuity which, in operation, regularly changes each phase of a symbol series included in each of the transmission signals of the n streams; and a transmitter which, in operation, transmits the transmission signals of the n streams from different antennas, the phases of each of the transmission signals of the n streams being changed in each symbol, wherein the transmission signal of an i-th stream has an mi kind of phase change value yi(t) (i is an integer between 1 and n (inclusive), 0≦yi<2π, and mi is set in each stream, t is an integer of 0 or more, and indicates a symbol slot), and the phase changing circuity changes the phase in one or more u (u=m1×m2× . .
Sun Patent Trust

Method and device for beamforming

Some embodiments relate to a method for transmitting a signal carrying data in a multiple-input multiple-output communication system. The method comprises applying a double-layer coordinated beamforming.
Orange

Per-tone precoding for downlink mimo transmission

In an aspect of the disclosure, a method, a computer-readable medium, and an apparatus are provided. The apparatus may be a base station.
Qualcomm Incorporated

Huawei Technologies Co., Ltd.

. .

Antenna configuration for co-operative beamforming

(a2) the first and second primary stations applying a precoding matrix across both the first antenna array and the second antenna array, and wherein the precoding matrix comprises a first vector for the first cell and a second vector for the second cell, the precoding matrix being based on the at least one channel matrix.. .

Precoding matrix indicator feedback method, receive end, and transmit end

And the first antenna group and the second antenna group belong to a same multi-antenna system; and sending, by the receive end, a precoding matrix indicator (pmi) to the transmit end. In this way, using the coefficient α to perform the phase adjustment on φn can increase a size of a codebook set applicable to different antenna configurations, and improve precision of the receive end to feed back a pmi..

Precoding method, apparatus, and system

The present disclosure relates to embodiments of a precoding method and systems for implementing those embodiments. The embodiments includes receiving, by a level 2 data center, level 1 channel information sent by at least two level 1 data centers, where the level 1 channel information includes a channel matrix between a terminal and the level 1 data center; performing, by the level 2 data center, calculation according to the channel matrix, to obtain a level 2 precoding matrix; and generating, by the level 2 data center, a level 2 signal according to a signal sent to the terminal and the level 2 precoding matrix, and sending the level 2 signal to the level 1 data center.
Huawei Technologies Co., Ltd.

Method for reporting channel state information, user equipment, and base station

Embodiments of the present invention provide a method includes: receiving a reference signal sent by a base station; selecting, based on the reference signal, a precoding matrix from a codebook, where a precoding matrix w included in the codebook is a product of three matrices being w1, z, and w2, that is, w=w1zw2, where both w1 and z are block diagonal matrices, w1=a formula (i), z=a formula (ii), each of w1 and z includes at least one block matrix, that is, nb≧1, and each column of each block matrix zi in the matrix z has the following structure formula (iii); and sending a precoding matrix indicator (pmi) to the base station, where the pmi corresponds to the selected precoding matrix, and is used by the base station to obtain the selected precoding matrix w according to the pmi.. .
Huawei Technologies Co., Ltd.

Method and implementing interference alignment on the basis of codebook design and selection

Disclosed are a method and apparatus for interference alignment based on codebook design and selection. The method includes: a codebook set including codebooks of different sizes of a precoding matrix is pre-designed or pre-stored; a receiver or a transmitter selects a codebook satisfying a specified condition from the codebook set to explicitly or implicitly notify the opposite end; the receiver designs, based on obtained ideal csi and an interference alignment condition, a precoding matrix v and a receiving matrix u for interference alignment; the receiver selects a matrix v′ having the highest similarity to v from the current codebook to serve as a finally quantized precoding matrix v′; the receiver calculates, based on v′, u again to obtain a receiving matrix u′ according to the interference alignment condition; and the transmitter transmits a signal according to feedback information and v′, and the receiver filters the signal according to u′..

Method for measuring downlink channel quality, transmit end, receive end, and system

The present disclosure disclose a method including: a transmit end transmits at least two mixed pilot signals to a receive end separately by using at least two physical antennas. The at least two mixed pilot signals are separately obtained after preset pilot signals corresponding to logical antennas in the at least two logical antennas are weighted by using a precoding weight matrix.
Huawei Technologies Co., Ltd.

Channel station information reporting and transmission mode for enhanced machine type communication

Methods, systems, and devices for wireless communication are described. A wireless device may identify a transmission mode that specifies a rank indicator (ri) feedback parameter for channel state indicator (csi) reporting, and may determine that the appropriate csi configuration excludes an ri.
Qualcomm Incorporated

Method for feeding back channel state information, receiving channel state information, and device

The present invention discloses a method for feeding back channel state information, a method for receiving channel state information, and a device. The method includes: selecting, by a terminal, a precoding matrix from a preset codebook subset for each subband in n subbands according to a configured reference signal, where each precoding matrix in the codebook subset is identified by a first pmi, a second pmi, and a third pmi that is used to indicate a phase relationship, first pmis corresponding to the precoding matrices selected by the terminal for all subbands in the n subbands are the same, the precoding matrix selected for each subband in the n subbands corresponds to one second pmi, and third pmis corresponding to the precoding matrices for all subbands in the n subbands are the same; and reporting, by the terminal, the first pmi, the second pmi, and the third pmi..
Huawei Technologies Co., Ltd.

Method for reporting precoding matrix index for high-frequency band communication in wireless communication system, and apparatus therefor

Disclosed in the present application is a method for a terminal reporting a precoding matrix index to a base station in a wireless communication system. Specifically, the method comprises the steps of: estimating a channel with the base station; on the basis of the estimated channel, selecting a first precoding matrix from a first codebook; on the basis of the estimated channel, selecting a second precoding matrix from a second codebook comprising only precoding matrixes which do not include the first precoding matrix; and reporting, to the base station, at least one among the index of the first precoding matrix and the index of the second precoding matrix..
Lg Electronics Inc.

Method and system for enabling resource block bundling in lte-a systems

A base station includes a transmit path circuitry to transmit an indication of whether a subscriber station is configured with precoding matrix indicator/rank indicator (pmi/ri) reporting. The transmit path circuitry sets a pre-coding granularity to multiple physical resource blocks in the frequency domain to perform a same pre-coding over a bundled resource block if the subscriber station is configured with pmi/ri reporting.
Samsung Electronics Co., Ltd

Method and reduced feedback mimo

Methods and apparatuses for csi reporting mechanisms are provided. A user equipment (ue) includes a transceiver and a processor operably connected to the transceiver.
Samsung Electronics Co., Ltd

Method and beamforming with coupled antennas

A method and apparatus provide beamforming with coupled antennas. A first channel matrix can be transformed into a transformed second channel matrix.
Motorola Mobility Llc

Method and controlling uplink transmission on discontinuous reception operation in wireless communication system

A method for controlling uplink transmissions on discontinuous reception (drx) operation, by a wireless device, in a wireless communication system, the method comprising: configuring a channel quality indicator (cqi)-masking which indicates that at least one of a cqi, a precoding matrix index (pmi), a rank indicator (ri), or a precoding type indicator (pti) is not to be reported on a physical uplink control channel (pucch) when an ondurationtimer is not running; and determining, at a first subframe prior to a second subframe, whether or not the ondurationtimer is to be running at the second subframe, wherein the at least one of the cqi, the pmi, the ri, or the pti is not to be reported on the pucch at the second subframe, if the ondurationtimer is determined, at the first subframe, to be not running at the second subframe.. .
Lg Electronics Inc.

Channel quality measurement method in multiple antenna wireless communication system and device for same

The present invention relates to a method and device for measuring channel quality by a base station having a two-dimensional active antenna system including multiple antennas. Particularly, the method comprises: receiving channel state information (csi) generated on the basis of a first reference signal relating to a part of multiple antennas, from a terminal; selecting a precoding and a rank based on a precoding matrix indicator (pmi) and a rank indicator (ri) of the received csi; generating a port by applying the selected precoding and the selected rank; through the generated port, transmitting, to the terminal, a physical downlink shared channel (pdsch) and a demodulation-reference signal (dm-rs) configured for the terminal; and receiving, from the terminal, a channel quality indication (cqi) feedback for reducing a mismatch for the cqi of the csi, wherein the cqi feedback may be generated based on the dm-rs..
Lg Electronics Inc.

Signal processing method, transmitter, and compressive sampling receiving device

Embodiments provide a signal processing method, a transmitter, and a compressive sampling receiving device. The method includes: obtaining a periodic pseudo random sequence used when a compressive sampling receiving device performs frequency mixing.
Huawei Technologies Co., Ltd.

Transmission method, transmitter apparatus, reception method and receiver apparatus

Transmission quality is improved in an environment in which direct waves dominate in a transmission method for transmitting a plurality of modulated signals from a plurality of antennas at the same time. All data symbols used in data transmission of a modulated signal are precoded by hopping between precoding matrices so that the precoding matrix used to precode each data symbol and the precoding matrices used to precode data symbols that are adjacent to the data symbol in the frequency domain and the time domain all differ.
Sun Patent Trust

Channel state information csi reporting method and apparatus, and base station antenna

The present invention discloses a channel state information csi reporting method and apparatus, and a base station antenna. In the method, at least one precoding matrix is selected from a codebook based on a reference signal sent by a base station, and csi is sent to the base station.
Huawei Technologies Co., Ltd.

System and multiple-input and multiple-output (mimo) full-duplex precoding algorithms

Embodiments are provided to enable effective cancellation or reduction of the self-interference (si) introduced when applying full-duplex transmission to mimo systems. A method embodiment includes forming, using a first component matrix of a precoding matrix generated in accordance with signal channel conditions, a plurality of beams for a plurality of transmit signals, and forming, using a second component matrix of the precoding matrix, a plurality of si cancellation signals corresponding to the transmit signals.
Huawei Technologies Canada Co., Ltd.

Information feedback method, terminal, base station, communication system and storage medium

Disclosed are a channel state feedback information determination method, a terminal, a base station and a communication system. The method includes that: a channel state is measured to form a measurement result; when a rank indicator (ri) is 2, a precoding matrix is formed according to the measurement result and a precoding codebook matrix model w; and channel state feedback information is formed according to the precoding matrix.
Zte Corporation

Signal generating method and signal generating device

A transmission method of simultaneously transmitting a first modulated signal and a second modulated signal at a common frequency performs precoding on both signals using a fixed precoding matrix and regularly changes the phase of at least one of the signals. One of signal generation processing in which phase change is performed and signal generation processing in which phase change is not performed is selectable, thereby improving general versatility in signal generation..
Sun Patent Trust

Method and csi reporting on pucch

A method of a user equipment (ue) for channel state information (csi) reporting in a wireless communication system. The method comprises receiving csi reporting configuration information, generating a csi report comprising at least one of a rank indicator (ri), a channel quality indicator (cqi), a precoding matrix indicator (pmi), or a csi-rs resource indicator (cri) based on the csi reporting configuration information, determining a number of bits of a payload included in the csi report, and selecting at least one of a physical uplink control channel (pucch) format or a physical uplink shared channel (pusch) based on the number of bits of the payload included in the csi report to transmit the csi report..
Samsung Electronics Co., Ltd

Method and transmitting signal in wireless communication system

A method and apparatus for transmitting a signal in a wireless communication system are provided. The method includes: generating r spatial streams each of which is generated on the basis of an information stream and a reference signal; generating n transmit streams on the basis of the r spatial streams and a precoding matrix (where r<n); mapping the n transmit streams to at least one resource block; and generating n signals from the n transmit streams mapped to the at least one resource block, and the transmitting the n signals to a user equipment through respective antennas..
Lg Electronics Inc.

Beamforming signaling in a wireless network

Methods, apparatus, and systems for wireless communications are described. A first base station may be configured to transmit a measurement information message to a wireless device.
Comcast Cable Communications, Llc

Non-linear precoder with separate tracking

A network unit includes a non-linear precoder for jointly pre-processing transmit samples to be transmitted over respective communication channels for crosstalk mitigation. The non-linear precoder includes a first non-linear precoding stage configured to operate according to a first triangular precoding matrix and including a modulo function, followed by a second linear precoding stage configured to operate according to a second precoding matrix.
Alcatel Lucent

Calibration and beamforming in a wireless communication system

Techniques for performing calibration and beamforming in a wireless communication system are described. In an aspect, a node b may periodically perform calibration in each calibration interval with a set of ues to obtain a calibration vector for the node b.
Qualcomm Incorporated

Method and apparatus of controlling periodic csi reporting

Exemplary embodiments of the present invention relates to an apparatus and method for performing periodic csi reporting available in a system supporting a tdd-fdd aggregation operation and an fdd-tdd aggregation operation. A periodicity and an offset for periodic reporting of channel quality indicator and precoding matrix indicator may be determined based on the cell type of a primary serving cell for a tdd-fdd carrier aggregation and an fdd-tdd carrier aggregation..
Innovative Technology Lab Co., Ltd.

Improved beamforming method in multi-antenna wireless communication system and same

The present invention relates to a method and an apparatus for beamforming by a base station in a wireless communication system supporting multiple antennas. Particularly, the method comprises the steps of: determining a first coverage on the basis of long-term feedback information; setting multiple logical antenna ports for the first coverage on the basis of a combination of multiple horizontal beams and multiple vertical beams; and transmitting a channel state information-reference signal to a terminal according to a precoding matrix index which is set on the basis of the multiple antenna ports, wherein the multiple horizontal beams respectively correspond to multiple second coverages divided into horizontal domains on the basis of the first coverage, and the multiple vertical beams respectively correspond to multiple third coverages divided into vertical domains on the basis of the first coverage..
Lg Electronics Inc.

Operation of a multi-standard base station site supporting at least two different radio access technologies

In a multi-standard base station site, a first base station module is configured to operate in multi-antenna transmission mode according to a first radio access technology by means of multiple transmitter branches. The first base station module is also configured to determine phase/time compensation information based on ue feedback information representative of precoding matrix index, pmi.
Telefonaktiebolaget Lm Ericsson (publ)

Higher rank codebooks for advanced wireless communication systems

A user equipment (ue) capable of communicating with a base station includes a plurality of antenna ports p, the ue includes a transceiver configured to receive downlink signals indicating precoder codebook parameters, the downlink signal including first and second quantities of antenna ports (n1, n2) indicating respective quantities of antenna ports in first and second dimensions, first and second oversampling factors (o1, o2) indicating respective oversampling factors for dft beams in the first and second dimensions, and a codebook subset selection configuration among a plurality of codebook subset selection configurations, and a controller configured to determine first and second beam skip numbers (s1, s2) indicating respective differences of leading beam indices of two adjacent beam groups in the first and second dimensions, determine a plurality of precoding matrix indicators (pmis) including a first pmi (i1,1, i1,2) and a second pmi i2, based on the received downlink signals and the skip numbers (s1, s2), and cause the transceiver to transmit uplink signals containing the plurality of pmis to the base station.. .
Samsung Electronics Co., Ltd

Codebook sub-sampling for csi feedback on pucch for 4tx mimo

Channel state information (csi) feedback in a wireless communication system (100) is disclosed. User equipment (107) transmits a csi feedback signal via a physical uplink control channel (pucch) (108).
Texas Instruments Incorporated

Downlink control information (dci) enhancements for non-orthogonal multiple access

The present disclosure relates to downlink control information (dci) enhancements for non-orthogonal multiple access. For example, the disclosure presents a method and an apparatus for wireless communications that may include determining, at the base station, downlink control information (dci) for a first user equipment (ue), wherein the dci for the first ue comprises modulation order information, spatial layer information, and power ratio information of the first ue, and a precoding matrix indicator (pmi) and spatial layer information of a second ue; and transmitting the determined dci to the first ue..
Qualcomm Incorporated

Method and efficient feedback in a wireless communication system supporting multiple antenna

A method for transmitting channel status information (csi) via uplink in a wireless communication system includes transmitting a first precoding matrix indicator (pmi) and a second pmi at a subframe. A subsampled codebook for each of a precoding codebook for rank-1 and a precoding codebook for rank-2 is determined based on at least the first pmi or the second pmi.
Lg Electronics Inc.

Precoding matrix indicator feedback method, receiving method, and apparatus

Embodiments of the present invention disclose a precoding matrix indicator feedback method, receiving method, and apparatus. User equipment ue receives a reference signal sent by a base station; the ue selects, based on the reference signal, a precoding matrix for each first subband of n first subbands in a system transmission bandwidth from a codebook, where the codebook includes at least two precoding matrixes, and each precoding matrix is denoted by at least a first precoding matrix indicator pmi and a second pmi, where each first subband of the n first subbands corresponds to a second pmi, and each second subband of m second subbands corresponds to a first pmi; and the ue feeds back the first pmi corresponding to each second subband to the base station, and feeds back the second pmi corresponding to each first subband to the base station..
Huawei Technologies Co., Ltd.

Method and channel measurement and feedback

Embodiments of the invention provide a method for channel measurement and feedback. The method comprises transmitting a first csi-rs and a second csi-rs to a user equipment for vertical csi measurement, wherein the first csi-rs is based on antenna configuration of one vertical antenna element mapping to one vertical antenna port, and the second csi-rs is based on antenna configuration of multiple vertical antenna elements mapping to one vertical antenna port.
Nec Corporation

Method of transmitting control information using physical uplink shared channel region in mimo antenna system

Provided is a method of transmitting control information using a physical uplink shared channel (pusch) region in a system employing a multi-input multi-output (mimo) antenna system in which transmission is performed through a plurality of layers. A method of transmitting a channel quality indicator (cqi)/precoding matrix indicator (pmi) using a pusch region in a system employing a mimo antenna system in which transmission is performed through a plurality of layers includes encoding the cqi/pmi using one channel encoder, and transmitting the encoded cqi/pmi using some or all of the layers.
Electronics And Telecommunications Research Institute

Method for reporting channel state information, user equipment, and base station

The present application discloses a method for reporting channel state information, user equipment, and a base station. The method includes: receiving a first reference signal set sent by a base station, where the first reference signal set includes at least two reference signals; sending first csi to the base station, where the first csi is determined according to the first reference signal set, and the first csi includes a first ri and/or a first pmi, where the first pmi is used to indicate a first precoding matrix; receiving a second reference signal set sent by the base station, where the second reference signal set is determined based on the first csi, and the second reference signal set includes at least one reference signal; and sending second csi to the base station, where the second csi is determined according to the second reference signal set..
Huawei Technologies Co., Ltd.

Signal generation method and signal generation device

A transmission method simultaneously transmitting a first modulated signal and a second modulated signal at a common frequency performs precoding on both signals using a fixed precoding matrix and regularly changes the phase of at least one of the signals, thereby improving received data signal quality for a reception device.. .
Sun Patent Trust

Method for transmitting channel state information in wireless access system

A method is provided for reporting channel state information (csi) in a wireless access system which supports carrier aggregation. A user equipment (ue) measures a first type csi for a first component carrier (cc) of two or more downlink (dl) ccs, and measures a second type csi for a second cc of the two or more dl ccs.
Lg Electronics Inc.

Advanced beamforming and feedback methods for mimo wireless communication systems

A user equipment (ue) capable of communicating with a base station (bs) includes a transceiver configured to receive a signal comprising a csi process configuration, wherein the csi process configuration comprises a csi-rs resource configuration to identify a csi-rs resource and a csi-rs on the csi-rs resource, and transmit a precoding matrix indicator to the base station, and a controller configured to derive the precoding matrix indicator utilizing the csi-rs on the csi-rs resource. When the csi-rs resource configuration indicates 4 csi-rs ports: the precoding matrix indicator has a 3-bit size when a rank to derive the precoding matrix indicator is one; the precoding matrix indicator has a 3-bit size when the rank is two; the precoding matrix indicator has a 2-bit size when the rank is three; and the precoding matrix indicator has a 1-bit size when the rank is four..
Samsung Electronics Co., Ltd

Method for transmitting and receiving downlink control information

A method for efficiently transmitting and receiving downlink control information is disclosed. The method includes, at a base station, receiving feedback information including a precoding matrix index (pmi) from a user equipment (ue) and transmitting precoding information having a predetermined bit number according to the number of antenna ports and a transmission mode of the base station.
Lg Electronics Inc.

Beamforming based communications method and apparatus

Embodiments of the present application provide a beamforming based communications method and apparatus. The method includes: obtaining, by a transmit end, a transmit-end precoding matrix trbb, a transmit-end intermediate-frequency beamforming matrix trif, and a transmit-end radio-frequency-end beamforming matrix trrf according to feedback information that is from a receive end; acquiring a first data stream, and performing precoding processing on the first data stream according to trbb, to generate a first analog signal; performing weighting and power amplification processing on the first analog signal according to trif, to generate a second analog signal; performing weighting and power amplification processing on the second analog signal according to trrf, to generate a third analog signal; and determining an antenna array matching the third analog signal, and transmitting the third analog signal to the receive end by using the antenna array matching the third analog signal..
Huawei Technologies Co., Ltd.

Precoding with a codebook for a wireless system

A base station used in a wireless communications system with multiple transmission ranks is disclosed. The base station comprises a memory to store a codebook for a transmission rank, a beamforming controller to precode data with a precoding matrix selected from the codebook, and a transmitter to transmit the precoded data to a user equipment, wherein the precoding matrix is selected according to a first description and a second description, which are unique to the precoding matrix, and wherein the second description provides a finer description of the codebook than the first description.
Nec Corporation

Method and transmitting and receiving channel state information

A communication method of a user equipment in a mobile communication system. The method includes receiving a control signal from a base station, the control signal comprising at least one of: a first information element or a second information element; determining, if a field of the first information element is set to a predetermined value and a channel state information (csi) reporting mode determined based on the second information element is a redetermined mode, a codebook based on the csi reporting mode; generating a csi based on the determined codebook, the csi comprising at least one of a rank indicator (ri), a first precoding matrix indicator (pmi), or a second pmi; and reporting the generated csi to the base station..
Samsung Electronics Co., Ltd.

Codebook sub-sampling for csi feedback on pucch for 4tx mimo

Channel state information (csi) feedback in a wireless communication system is disclosed. User equipment transmits a csi feedback signal via a physical uplink control channel (pucch).
Texas Instrumentsins Corporated

Method for feeding back channel state information, user equipment, and base station

Embodiments of the present invention provide a method for feeding back channel state information, a user equipment, and a base station, to improve feedback precision of channel state information. The method includes: receiving a reference signal sent by a base station; selecting a precoding matrix w from a codebook according to the reference signal, where a column vector of the precoding matrix w may be expressed as α[v ejφv]t, v=[1 ejθ]; and sending a precoding matrix indicator pmi to the base station, where the pmi is corresponding to the selected precoding matrix w.
Huawei Technologies Co., Ltd.

Method of performing a hybrid beamforming in a wireless communication system and apparatus therefor

A method of performing a beamforming in a base station of a wireless communication system according to one embodiment of the present invention may include determining an effective range of an analog beam based on a gain of an analog beam-forming in a hybrid beamforming, determining a precoding matrix for a digital beamforming in the hybrid beamforming based on the effective range of the analog beam, and performing the hybrid beamforming having the digital beamforming and the analog beam-forming coupled therein based on the effective range and the precoding matrix.. .
Lg Electronics Inc.

Method and channel state information (csi) reporting

Methods and apparatuses for csi reporting mechanisms are provided. A user equipment (ue) apparatus includes a transceiver and a processor.
Samsung Electronics Co., Ltd

Precoding matrix set determining method and apparatus, and parameter indication information sending method and apparatus

A precoding matrix set determining method and apparatus, and a parameter indication information sending method and apparatus are provided. The precoding matrix set determining method include: determining, by a first network device, a parameter used for determining a precoding matrix set, where the parameter includes at least one of a phase parameter, an amplitude parameter, a quantity of vectors in the precoding matrix set, a quantity of vectors in a first codebook set in dual-codebook feedback, and a quantity of vectors in a second codebook set in the dual-codebook feedback, and the parameter is not fixed; and using the parameter to determine the precoding matrix set, where the precoding matrix set includes at least one precoding matrix.
Huawei Technologies Co., Ltd.

Transmission method, transmitter apparatus, reception method and receiver apparatus

Transmission quality is improved in an environment in which direct waves dominate in a transmission method for transmitting a plurality of modulated signals from a plurality of antennas at the same time. All data symbols used in data transmission of a modulated signal are precoded by hopping between precoding matrices so that the precoding matrix used to precode each data symbol and the precoding matrices used to precode data symbols that are adjacent to the data symbol in the frequency domain and the time domain all differ.
Sun Patent Trust

System and multiple-input and multiple-output (mimo) full-duplex precoding structures

Embodiments are provided to enable effective cancellation or reduction of the self-interference (si) introduced when applying full-duplex (fd) transmission to multiple-input-multiple-output (mimo) systems. A method embodiment includes forming, using a precoding matrix generated in accordance with channel conditions, a plurality of beams for a plurality of transmit signals and a plurality of self-interference cancellation signals corresponding to the plurality of transmit signals.
Huawei Technologies Canada Co., Ltd.

Codebook design and structure for advanced wireless communication systems

A base station capable of communicating with a user equipment (ue) includes a transceiver configured to transmit downlink signals containing first and second antenna numbers, first and second oversampling factors indicating respective oversampling rates in first and second dimensions for each beam group, first and second quantities of beams indicating respective quantities of beams in the first and second dimensions for each beam group, and first and second beam skip numbers indicating respective differences of leading beam indices of two adjacent beam groups in the first and second dimensions, receive uplink signals containing a plurality of precoding matrix indicators (pmis) from the ue. Other embodiments including methods and ues and methods are disclosed..
Samsung Electronics Co., Ltd

Method and arrangement for adapting a multi-antenna transmission

A method in a first node for adapting a multi-antenna transmission to a second node over a wireless channel is provided. The wireless channel has at least three inputs and at least one output.
Telefonaktiebolaget Lm Ericsson (publ)

Signal generating method and signal generating apparatus

A transmission method for simultaneously transmitting a first modulated signal and a second modulated signal at the same frequency includes performing precoding on both signals using a fixed precoding matrix and regularly changing the phase of at least one of the signals. In this method, the power ratio between a plurality of signals transmitted from a plurality of antennas at the same frequency and at the same time differs from the power ratio between a plurality of pilot signals transmitted from the plurality of antennas at the same frequency and at the same time, whereby the accuracy of channel estimation by a reception device is improved..
Sun Patent Trust

Method and device for transmitting channel state information

The present invention discloses a method and a device for transmitting channel state information, where the method includes: determining, by a first network device according to measurement of a reference signal sent by a second network device, channel state information including a precoding matrix indication pmi and selection information that is used to instruct to select a matrix element in a precoding matrix indicated by the pmi; and sending the channel state information to the second network device. Because the channel state information includes the precoding matrix indication pmi and the selection information, the second network device can determine a precoding matrix for performing precoding, and synthesize a channel precoding matrix applicable to a two-dimensional antenna.
Huawei Technologies Co., Ltd.

Pre-coding in a faster-than-nyquist transmission system

The invention refers to faster than nyquist communication system wherein a set of symbols is conveyed from a transmitter (21) to a receiver (23), wherein the transmitter (21) and the receiver (23) are coupled by means of a transmission channel (22), comprising a precoder (210) adapted for generating a set of precoded symbols from a set of input symbols by performing a matrix operation with a precoding matrix, a pulse filter (212) adapted for generating a transmission signal to be transmitted over the transmission channel (22) as a function of the precoded symbols, a receiving filter (230) adapted for generating a set of sampled symbols as a function of the transmission signal and noise added by the transmission channel, and a decoder (232) adapted for generating a set of decoded symbols as a function of the set of sampled symbols, wherein the elements of the precoding matrix are dependent on a property of the pulse filter (212), the invention further refers to a transmitter, a receiver and corresponding methods, and to a user equipment and a base station.. .
Telefonaktiebolaget Lm Ericsson (publ)

Method, apparatus and communication unit

A method, an apparatus and a communication unit for generating precoding feedback information in a multiple frequency radio transmission system are disclosed. A rank for precoding matrices, wherein the rank is constant over the multiple frequencies, is selected and a plurality of precoding matrices having the selected rank are selected.
Intel Deutschland Gmbh

Wireless transmission precoding

Embodiments of the present disclosure describe systems and methods for precoding wireless transmissions. Various embodiments may precode rank-one or rank-two wireless transmissions onto four antennas.
Intel Ip Corporation

Uplink control information transmission methods for carrier aggregation

A method and apparatus for transmitting uplink control information (uci) for long term evolution-advanced (lte-a) using carrier aggregation is disclosed. Methods for uci transmission in the uplink control channel, uplink shared channel or uplink data channel are disclosed.
Interdigital Patent Holdings, Inc.

Feedback channel transmission and detection in multi antenna wireless communication systems

A method by a network node in a communications system includes determining a codebook subset restriction indicating a reduced set of precoding matrices out of an original set of precoding matrices in an original codebook. The full set of precoding matrix indicator, pmi, bits is used to identify the original set of precoding matrices in the original codebook.
Telefonaktiebolaget Lm Ericsson (publ)

Transmission method, transmission apparatus, reception method and reception apparatus

All data symbols used in data transmission of a modulated signal are precoded by hopping between precoding matrices so that the precoding matrix used to precode each data symbol and the precoding matrices used to precode data symbols that are adjacent to the data symbol in the frequency domain and the time domain all differ. A modulated signal with such data symbols arranged therein is transmitted..
Sun Patent Trust

Interference suppression method and apparatus

Embodiments of the present invention provide an interference suppression method and apparatus. The method includes: determining a precoding matrix according to a channel fading matrix, where the channel fading matrix is an n×m matrix, m is a quantity of antennas of a transmit end candidate device, n is a quantity of antennas of a receive end device, and each element in the channel fading matrix represents channel fading that occurs when each antenna of the transmit end candidate device transmits a signal to each antenna of the receive end device; acquiring a receiving base vector according to the precoding matrix, signal power of the transmit end candidate device, and a channel fading matrix from a signal to the receive end device; and determining receiving subspace according to the receiving base vector and receiving, in the receiving subspace, a signal sent by a transmit end selected device..
Huawei Technologies Co., Ltd.

Method for transmitting channel state information and apparatus therefor

A method for reporting, by a ue, a downlink channel state in a wireless communication system according to an embodiment of the present invention includes: receiving a vertical precoding matrix indicator (pmi) to be used to calculate the downlink channel state; calculating a value of the downlink channel state using the received vertical pmi; and reporting the calculated downlink channel state value to an enb, wherein the received vertical pmi is used from a later subframe between a subframe in which the vertical pmi is received and a subframe preceding a subframe in which the calculated downlink channel state value is reported by the number of subframes necessary to calculate the downlink channel state value using the received vertical pmi.. .
Lg Electronics Inc.

Feedback signaling error detection and checking in mimo wireless communication systems

A method of feedback in a wireless transmit receive unit includes providing a precoding matrix index (pmi), error checking the (pmi) to produce an error check (ec) bit, coding the pmi and the ec bit and transmitting the coded pmi and ec bit.. .
Interdigital Technology Corporation

Method and performing effective feedback in wireless communication system supporting multiple antennas

A method for transmitting channel status information (csi) of downlink multi-carrier transmission includes generating the csi including at least one of a rank indicator (ri), a first precoding matrix index (pmi), a second pmi and a channel quality indicator (cqi) for one or more downlink carriers, the cqi being calculated based on precoding information determined by a combination of the first and second pmis, determining, when two or more csis collide with one another in one uplink subframe of one uplink carrier, a csi to be transmitted on the basis of priority, and transmitting the determined csi over a uplink channel. If a csi including an ri or a wideband first pmi collides with a csi including a wideband cqi or a subband cqi, the csi including a wideband cqi or a subband cqi has low priority and is dropped..
Lg Electronics Inc.

Mcs/pmi/ri selection and coding/interleaving mechanism for bursty interference and puncturing handling

Bursty interference or puncturing may be identified, either by a user equipment (ue) or by a base station. In response, a protection scheme may be applied to protect communications from the bursty interference or puncturing.
Qualcomm Incorporated

Spreading and precoding in ofdm

An ofdm transmitter spreads original data symbols with a complex-valued spreading matrix derived from a discrete fourier transform. Spread data symbols are mapped to ofdm subcarriers.
Genghiscomm Holdings, Llc

Method and correcting errors in a multiple subcarriers communication system using multiple antennas

A method for correcting errors in a multiple antenna system based on a plurality of sub-carriers and a transmitting/receiving apparatus supporting the same are disclosed. The method includes determining a phase shift based precoding matrix phase shifted at a predetermined phase angle, initially transmitting each sub-carrier symbol to a receiver in a packet unit by using the phase shift based precoding matrix, reconstructing the phase shift based precoding matrix to reduce a spatial multiplexing rate if a negative reception acknowledgement (nack) is received from the receiver, and retransmitting the initially transmitted sub-carrier symbol by using the reconstructed phase shift based precoding matrix or by changing the phase shift based precoding matrix using offset information fed back from the receiver or random offset information..
Lg Electronics Inc.

4tx codebook enhancement in lte

Channel state information (csi) feedback in a wireless communication system is disclosed. A precoding matrix is generated for multi-antenna transmission based on precoding matrix indicator (pmi) feedback, wherein the pmi indicates a choice of precoding matrix derived from a matrix multiplication of two matrices from a first codebook and a second codebook.
Texas Instruments Incorporated

Method of transmitting pilot bits in a wireless communication system

A method of allocating pilot bits in a wireless communication system using a multiple carrier modulation (mcm) is disclosed. The method includes allocating a plurality of precoded data symbols precoded by a precoding matrix module and a plurality of non-precoded pilot bits to a plurality of subcarriers, and transmitting the allocated precoded data symbols and the allocated non-precoded pilot bits..
Lg Electronics Inc.

Codebook construction

A method implemented in a base station used in a wireless communications system is disclosed. The method comprises having 1-layer, 2-layer, 3-layer, and 4-layer codebooks for 4 transmit antenna (4tx) transmission, each codebook including a plurality of precoding matrices, (precoding data with one of the plurality of precoding matrices, and transmitting, to a user equipment, the precoded data, wherein each of the 1-layer and 2-layer codebooks comprises a first codebook and a second codebook, and wherein each precoding matrix in the first codebook comprises a first index and a second index.
Nec Corporation

Signal generating method and signal generating device

A transmission method of simultaneously transmitting a first modulated signal and a second modulated signal at a common frequency performs precoding on both signals using a fixed precoding matrix and regularly changes the phase of at least one of the signals. One of signal generation processing in which phase change is performed and signal generation processing in which phase change is not performed is selectable, thereby improving general versatility in signal generation..
Panasonic Intellectual Property Corporation Of America

Precoding and feedback channel information in wireless communication system

The present invention relates to precoding and feedback channel information in wireless communication system. A method includes receiving a first precoding matrix index (pmi) and a second pmi from a terminal; mapping one or two codewords into layers; precoding symbols mapped into the layers using a first precoding matrix derived from the first pmi and a second precoding matrix derived from the second pmi; and transmitting the precoded symbols to the terminal, wherein the reception of the first pmi is less frequent than the reception of the second pmi..
Pantech Co., Ltd.

Signal transmission method and apparatus using codebook in wireless communication system supporting multiple antennas

The present invention relates to a method for transmitting, by a base station, a downlink signal using a plurality of transmission antennas comprises the steps of: applying a precoding matrix indicated by the pmi, received from a terminal, in a codebook to a plurality of layers, and transmitting the precoded signal to the terminal through a plurality of transmission antennas. Among precoding matrices included in the codebook, a precoding matrix for even number transmission layers can be a 2×2 matrix containing four matrices (w1s), the matrix (w1) having rows of a number of transmission antennas and columns of half the number of transmission layers, the first and second columns of the first row in the 2×2 matrix being multiplied by 1, the first column of the second row being multiplied by coefficient “a” of a phase, and the first column of the second row being multiplied by “−a”..
Lg Electronics Inc.

Transmission device and transmission method

A transmission device comprising: a weighting circuity which, in operation, generates transmission signals of n streams (n is an integer of 3 or more) by weighting modulated signals of the n streams using a predetermined fixed precoding matrix; a phase changing circuity which, in operation, regularly changes each phase of a symbol series included in each of the transmission signals of the n streams; and a transmitter which, in operation, transmits the transmission signals of the n streams from different antennas, the phases of each of the transmission signals of the n streams being changed in each symbol, wherein the transmission signal of an i-th stream has an mi kind of phase change value yi(t) (i is an integer between 1 and n (inclusive), 0≦yi<2π, and mi is set in each stream, t is an integer of 0 or more, and indicates a symbol slot), and the phase changing circuity changes the phase in one or more u (u=m1×m2× . .
Panasonic Intellectual Property Management Co., Ltd.

Method for selecting pmi for non-adaptive harq operation in a mimo wireless communication system

A method for transmitting an uplink signal at a user equipment (ue) in a wireless communication system includes receiving, from a base station (bs), an uplink scheduling grant for multi-antenna transmission; transmitting the uplink signal precoded using precoding information included in the received uplink scheduling grant to the bs; and retransmitting the uplink signal to the bs according to acknowledgment/negative acknowledgment (ack/nack) corresponding to the transmitted uplink signal. The retransmitted uplink signal is precoded using precoding information included in a most recent uplink scheduling grant or a predetermined precoding matrix if an uplink scheduling grant for the retransmission is not received from the bs..
Lg Electronics Inc.

Precoding in high-order mimo

A high-order multiple-input-multiple-output (mimo) transmitter implementing a covariance-based precoding scheme that exploits transmit channel correlation and a method of operation thereof are provided. In one embodiment, covariance-based precoding is performed at the high-order mimo transmitter based on feedback from a remote high-order mimo receiver regarding a covariance-based precoding matrix.
Apple Inc.

Huawei Technologies Co., Ltd.

. .

Method and efficient feedback in a wireless communication system supporting multiple antenna

A method for transmitting channel status information (csi) via uplink in a wireless communication system includes transmitting a first precoding matrix indicator (pmi) and a second pmi at a subframe. A subsampled codebook for each of a precoding codebook for rank-1 and a precoding codebook for rank-2 is determined based on at least the first pmi or the second pmi.
Lg Electronics Inc.

Method for feeding back channel quality indicator in wireless communication system and apparatus therefor

In this application, a method for a terminal reporting to a base station a channel quality indicator (cqi) in a wireless communication system is disclosed. More specifically, the method comprises the steps of: calculating a precoding matrix index and a rank indicator; and selecting and reporting the cqi index from one of a first cqi index table and a second cqi index table under the assumption that the precoding matrix index and the rank indicator are applied, wherein the first cqi index table and the second cqi index table indicate a modulation order and a coding rate indicated by the cqi index, and the second cqi index table supports a higher modulation order than the first cqi index table..
Lg Electronics Inc.

Soft codebook subset restriction for elevation beamforming

A communications system has a cellular structure including a base station that is located within a cell of the cellular structure and provides an elevation beamforming transmission based on a set of elevation precoding matrix indicator offsets in an elevation codebook. The communications system also includes user equipment that is located within the cell and coupled to the base station to receive the set of elevation precoding matrix indicator offsets and a set of reference signals to provide channel quality and inter-cell interference measurements, wherein a selected channel quality indicator is based on an increase in channel quality with respect to inter-cell interference at the user equipment and corresponds to one of the set of elevation precoding matrix indicator offsets.
Nvidia Corporation

Precoding matrix indicator feedback method, receive end, and transmit end

And the first antenna group and the second antenna group belong to a same multi-antenna system; and sending, by the receive end, a precoding matrix indicator (pmi) to the transmit end. In this way, using the coefficient α to perform the phase adjustment on φn can increase a size of a codebook set applicable to different antenna configurations, and improve precision of the receive end to feed back a pmi..

Method and reduced feedback fd-mimo

A method for operating a base station includes receiving an uplink signal from a user equipment (ue), wherein the uplink signal includes a precoding matrix indicator (pmi) associated with a first precoder index of a codebook determined by a first and a second precoder indices, and a channel quality indicator (cqi). The method includes applying an open-loop diversity operation to at least one data stream including quadrature amplitude modulation (qam) symbols to generate n_b signal streams and applying a precoding matrix to the n_b signal streams to generate a larger number of n_tx data streams to be transmitted via a plurality of antennas..
Samsung Electronics Co., Ltd.

Wireless communication system, communication device and communication method

A mobile station device comprising circuitry that is configured and/or programmed to derive channel quality information which includes at least one of a channel quality indicator, a rank indication, and a precoding matrix indicator and to transmit the channel quality information using a physical uplink channel resource between a first physical uplink channel resource and a second physical uplink channel resource. The physical uplink channel resource is given by comparing a first bandwidth for the first physical uplink channel resource and a second bandwidth for the second physical uplink channel resource.
Sharp Kabushiki Kaisha

Signal generating method and signal generating device

A transmission method for transmitting a first modulated signal and a second modulated signal in the same frequency at the same time. Each signal has been modulated according to a different modulation scheme.
Panasonic Intellectual Property Corporation Of America

Method and efficient feedback in a wireless communication system supporting multiple antennas

A method and apparatus for performing effective feedback in a wireless communication system supporting multiple antennas. A method for transmitting csi of downlink transmission via uplink in a wireless communication system includes transmitting a joint-coded rank indicator (ri) and a first wideband (wb) precoding matrix indicator (pmi) at a first subframe, and transmitting a wideband channel quality indicator (wb cqi) and a second wb pmi at a second subframe.
Lg Electronics Inc.

Apparatus and adaptive transmission power normalization in wireless communication system

A transmission normalization in a wireless communication system adopting hybrid beamforming is provided. An operating method of a transmitter includes transmitting control information on transmission power normalization, receiving information indicating a precoding matrix and an analog beam selected based on the control information, and transmitting a signal normalized using a normalization coefficient corresponding a combination of the precoding matrix and the analog beam..

Methods and apparatuses for channel estimation and feedback in a three-dimensional multiple input and multiple output system

Embodiments of the present disclosure relate to methods and apparatuses for channel estimation and feedback in a three dimensional multiple input multiple output (3d-mimo) system. A method may comprise: transmitting a plurality of reference signals for a plurality of columns in an antenna array; receiving indication information on configuration adjustment of a precoding information feedback, wherein the indication information is based on measurement on the plurality of reference signals; and adjusting a configuration of the precoding information feedback based on the indication information so that a multiple vertical precoding information feedback is enabled when it can obtain a performance gain.

Channel state information feedback schemes for fd-mimo

A method of operating a user equipment (ue). The method includes receiving a configuration message comprising a reporting type of channel state information (csi).

4tx codebook enhancement in lte

Channel state information (csi) feedback in a wireless communication system is disclosed. A precoding matrix is generated for multi-antenna transmission based on precoding matrix indicator (pmi) feedback, wherein the pmi indicates a choice of precoding matrix derived from a matrix multiplication of two matrices from a first codebook and a second codebook.

Transmission method, transmitter apparatus, reception method and receiver apparatus

Transmission quality is improved in an environment in which direct waves dominate in a transmission method for transmitting a plurality of modulated signals from a plurality of antennas at the same time. All data symbols used in data transmission of a modulated signal are precoded by hopping between precoding matrices so that the precoding matrix used to precode each data symbol and the precoding matrices used to precode data symbols that are adjacent to the data symbol in the frequency domain and the time domain all differ.
Panasonic Intellectual Property Corporation Of America

Beamforming

A method of beamforming a transmission from an antenna array having rows of antenna elements and columns of antenna elements may include determining a first precoding matrix associated with a first orientation. The method may further include determining a second precoding matrix associated with a second orientation.
Fujitsu Limited

Uplink signal transmission and reception using optimized rank 3 codebook

A method for transmitting and receiving uplink signals using an optimized rank 3 codebook is disclosed. The optimized rank 3 codebook includes 6 precoding matrix groups, each of which has 1 variable having an amplitude of 1.
Lg Electronics Inc.

Method for precoding using a block diagonal matrix

An objective problem of the invention is to provide a mechanism for improving the performance of a radio access network. According to a first aspect of the present invention, the object is achieved by a method in a first node for adapting a multi-antenna transmission to a second node over an effective channel.
Telefonaktiebolaget Lm Ericsson (publ)

Method for selecting precoding matrix indication, apparatus and system

Embodiments of the present invent provide a method for selecting a pre-coding matrix indication, an apparatus and a system. In embodiments the method includes sending, by a base station, indication information to a terminal, wherein the indication information is used to instruct the terminal to send uplink data without weighting the uplink data or after weighting the uplink data by using an identity matrix and receiving, by the base station, the uplink data sent by the terminal.
Huawei Technologies Co., Ltd.

Downlink signaling for partially precoded csi-rs and csi feedback

User equipment (ue) is configured to receive two types of channel state information (csi) reference signals (csi-rs), the first containing more antenna ports and measured less often than the second. A first csi report is based on first type csi-rs and a second csi report on the second type csi-rs.
Samsung Electronics Co., Ltd.

Method and precoding channel state information reference signal

A method for operating a base station includes allocating at least one respective csi-rs port to each of a plurality of user equipments (ues), precoding the at least one respective csi-rs port with a first respective precoding matrix for each of the plurality of ues, transmitting the at least one respective csi-rs port precoded with the first respective precoding matrix through a channel to each of the plurality of ues, receiving an index of a second respective precoding matrix from each of the plurality of ues, wherein the second respective precoding matrix is determined according to the at least respective one csi-rs port precoded with the first precoding matrix as received through the channel by each of the plurality of ues, and precoding respective transmission data with the first respective precoding matrix and the second respective precoding matrix to each of the plurality of ues.. .
Samsung Electronics Co., Ltd.

Method for determining precoding matrix indicator, receiving device, and sending device

Embodiments of the present invention provide a method for determining a precoding matrix indicator, a receiving device, and a sending device. The method for determining a precoding matrix indicator includes: selecting, by a receive end, a precoding matrix w from a codebook based on a reference signal sent by a transmit end, where the precoding matrix w is a product of two matrices w1 and w2, where the w1 includes nb block matrices xi, nb≦1, and the w1 is indicated as: w1=diag{x 1, .
Huawei Technologies Co., Ltd.

Signal generation method and signal generation device

A transmission method simultaneously transmitting a first modulated signal and a second modulated signal at a common frequency performs precoding on both signals using a fixed precoding matrix and regularly changes the phase of at least one of the signals, thereby improving received data signal quality for a reception device.. .
Panasonic Intellectual Property Corporation Of America

System and multiple-input multiple-output (mimo) orthogonal frequency division multiplexing (ofdm) offset quadrature amplitude modulation (oqam)

In one embodiment, a method for transmitting data in a multiple-input multiple-output (mimo) orthogonal frequency division multiplexing (ofdm)-offset quadrature amplitude modulation (oqam) system includes selecting a precoding matrix in accordance with a projection of the precoding matrix on a precoding space and generating a precoded modulated pulse shape by applying the precoding matrix to a data vector and a pulse shape. The method also includes transmitting, by a first device to a second device, the precoded modulated pulse shape..
Huawei Technologies Canada Co., Ltd.

Data sending and receiving method and data sending and receiving end

Disclosed are a data transmitting, receiving method, a data transmitting end, and a data receiving end. The transmitting method includes that: a transmitting end codes and modulates a plurality of transport blocks of a same receiving end, wherein a same precoding matrix is used to precode the plurality of transport blocks; the transmitting end maps the plurality of transport blocks onto time-frequency resources of a plurality of subframes; and the transmitting end transmits the plurality of subframes..
Zte Corporation

Signal generation method and signal generation device

A transmission method simultaneously transmitting a first modulated signal and a second modulated signal at a common frequency performs precoding on both signals using a fixed precoding matrix and regularly changes the phase of at least one of the signals, thereby improving received data signal quality for a reception device.. .
Panasonic Intellectual Property Corporation Of America

Methods to calculate linear combination pre-coders for mimo wireless communication systems

In a wireless communication system having an antenna array selectively configured to transmit channel state information reference signals (csi-rs) using a plurality of antenna ports and basis beam vectors selected from a master beam set or retrieved from memory, a codebook enables selection of a linear combination of at least a subset of the beams and co-phases and coefficients for each selected beam, where the co-phases determine the co-phasing weights for the selected beams for a cross-polarized antenna array, and the coefficients determine the linear combination of the selected beams. Feedback contains an indication of channel state information (csi) for the set of selected or retrieved basis beam vectors, the selected beams, co-phases, and coefficients.
Samsung Electronics Co., Ltd.

Method and precoding channel state information reference signal

A base station includes a transceiver, and a processor configured to allocate at least one csi-rs antenna port to a user equipment (ue), precode the at least one csi-rs antenna port with a first precoding matrix, cause the transceiver to transmit the at least one csi-rs antenna port precoded with the first precoding matrix through a channel to the ue, cause the transceiver to signal a number of the at least one antenna port to the ue, cause the transceiver to receive an index for a second precoding matrix from the ue, wherein the second precoding matrix is determined by the ue according to the at least one csi-rs antenna port precoded with the first precoding matrix as received through the channel by the ue and the signaled number of the at least one antenna port, and precode transmission data with the first precoding matrix and the second precoding matrix.. .
Samsung Electronics Co., Ltd.

Adaptive mimo feasibility feedback

In accordance with an example embodiment of the present invention, an apparatus comprises a processor and a memory including computer program code, wherein the memory and the computer program code, with the processor, are configured with the processor to cause the apparatus to receive a reference signal (302), estimate difference between actual eigen directions and precoding matrix based on the received reference signal (304), generate a feedback based on the result of the estimation (306), and transmit the feedback (38), wherein the feedback indicates at least one of the result of the estimation, whether a multi-user communication mode is desired or whether the feedback should be combined with another indication in order to determine whether a multi-user communication mode is desired (306). Methods and computer readable media are also described..
Nokia Technology Oy

Method and processing feedback in a wireless communication system

A method and apparatus for processing feedback implemented in a wireless transmit/receive unit (wtru) comprises estimating a channel matrix. The effective channel is calculated and a precoding matrix is selected.
Interdigital Technology Corporation

Method and transmitting uplink signals using multi-antenna

A method and apparatus for allowing a ue to transmit uplink signals using a mimo scheme are disclosed. In order to maintain good peak power to average power ratio (papr) or cubic metric (cm) properties when the ue transmits uplink signals using the mimo scheme, the ue uses a precoding scheme based on a precoding matrix established in a manner that one layer is transmitted to each antenna in specific rank transmission..
Lg Electronics Inc.

Method and transmitting uplink signals using multi-antenna

A method and apparatus for allowing a ue to transmit uplink signals using a mimo scheme are disclosed. In order to maintain good peak power to average power ratio (papr) or cubic metric (cm) properties when the ue transmits uplink signals using the mimo scheme, the ue uses a precoding scheme based on a precoding matrix established in a manner that one layer is transmitted to each antenna in specific rank transmission..
Lg Electronics Inc.

Codebook design and structure for advanced wireless communication systems

A base station capable of communicating with a user equipment (ue) includes a transceiver configured to transmit channel state information-reference signal (csi-rs) according to a csi-rs configuration comprising a number of antenna ports, and downlink signals containing the csi-rs configuration and a precoding-matrix-construction configuration for precoding matrix indicator (pmi) reporting on physical downlink shared channels (pdsch), the precoding-matrix-construction configuration comprising a first and second sampling factors, o1 and o2, and a first and second numbers, n1 and n2, receive, from the ue, uplink signals containing a precoding matrix indicator (pmi) derived using the csi-rs according to the precoding-matrix-construction configuration, a controller configured to convert the pmi to one of predetermined precoding matrices. Other embodiments including ues and methods are disclosed..
Samsung Electronics Co., Ltd.

Codebook based channel information feedback method, device and system

A codebook based channel information feedback method, device and system are provided in the present invention. The codebook based channel information feedback method includes: measuring, by a terminal in a communication system, a parameter of a downlink channel between the terminal and a base station of the communication system; selecting a plurality of precoding matrixes from a precoding codebook by using the parameter of the downlink channel, wherein a plurality of the precoding matrixes can be used by both of single-user multi-input multi-output (mimo) transport mode and multi-user mimo transport mode, and the precoding codebook is an aggregation of precoding matrixes; and feeding back a first information for indicating a plurality of the precoding matrixes to the base station..
Sony Corporation

Lpi/lpd communication systems

In a wireless communication system, a secure communication link is provided by selecting a decoy data signal for transmission, generating a precoding matrix from a message to be sent; and multiplying the decoy data signal by the precoding matrix to produce a precoded signal. A clean version of the decoy data may be transmitted to an intended receiver.
Department 13, Llc

Method and determining precoding matrix indicator, user equipment, and base station

A method and an apparatus determine a precoding matrix indicator, user equipment, and a base station. The method includes: determining a precoding matrix indicator pmi, where the pmi corresponds to a precoding matrix w, and the precoding matrix w satisfies a first condition, a second condition, or a third condition; and sending the pmi to a base station.

Methods and systems for combined cyclic delay diversity and precoding of radio signals

In a transmitter or transceiver, signals can be precoded by multiplying symbol vectors with various matrices. For example, symbol vectors can be multiplied with a first column subset of unitary matrix which spreads symbols in the symbol vectors across virtual transmit antennas, a second diagonal matrix which changes a phase of the virtual transmit antennas, and a third precoding matrix which distributes the transmission across the transmit antennas..

Method and transreceiving channel state information in wireless communication system

The present invention relates to a wireless communication system. A method for a terminal reporting channel state information in a wireless communication system, according to one embodiment of the present invention, comprises the steps of: receiving, from a second cell interfering with communication between a first cell and the terminal, a second precoding matrix indicator (pmi) determined based on the interference; and transmitting, to the first cell, the second pmi and a channel quality indicator (cqi)..

Lpi/lpd communication systems

In a wireless communication system, a secure communication link is provided by selecting a decoy data signal vector for transmission, generating a mimo precoding matrix from a message to be sent; and multiplying the decoy data signal vector by the mimo precoding matrix to construct a precoded signal vector. The mimo precoding matrix produces information-bearing synthesized channel distortions in the transmitted signal.
Department 13, Llc

Method for receiving downlink signal and apparatus therefor

Provided is a method for receiving a downlink signal in a wireless communication system, the method comprising: transmitting, by a user equipment (ue), information on vertical angle restriction to be used for a precoding matrix which the ue desires to an enodeb (enb); and receiving, by the ue, a downlink signal precoded according to the information on vertical angle restriction, wherein the information on vertical angle restriction includes values indicating a lower limit angle and an upper limit angle for the precoding matrix.. .
Lg Electronics Inc.

Method and open loop transmission in a multiple antenna wireless communication system

The invention concerns a method for precoding in an open loop transmission communications system. The method includes precoding data at each of m res with a precoding matrix, precoding each of dm-rss with one column of a precoding matrix which is same as that used for precoding m data res.
Huawei Technologies Co., Ltd.

Method for transmitting 4-antenna precoding matrix, user equipment and base station

The present invention discloses a method for transmitting a 4-antenna precoding matrix, a user equipment, and a base station. The method includes determining a rank used for indicating the number of transmission layers, determining a first precoding matrix in a codebook set corresponding to the rank, determining a first pmi and a second pmi used for indicating the first precoding matrix, and sending the first pmi and the second pmi used for indicating the first precoding matrix to a base station..
Huawei Technologies Co., Ltd.

Method and device for transmitting channel state information in wireless communication system

The present invention relates to a wireless communication system. A method for transmitting channel state information by a terminal in a wireless communication system according to an embodiment of the present invention includes the steps of: joint encoding a rank indicator (ri) and a first precoding matrix indicator (pmi) to a single encoded value, in a reporting mode for four antenna ports; and transmitting channel state information including the encoded value, wherein the encoded value is determined depending on a first table or a second table according to a maximum value of the ri, and an encoding value, which is identical to an encoding value according to the first table, among encoding values according to the second table, may have ri and first pmi identically corresponding to those of the encoding value according to the first table..
Lg Electronics Inc.

Method and transmitting channel state information in wireless communication system

The present invention relates to a wireless communication system. A method for a terminal for transmitting channel state information (csi) in a wireless communication system according to an embodiment of the present invention comprises the steps of: subsampling a first codebook associated with a first precoding matrix indicator (pmi) and a second codebook associated with a second pmi according to a reporting mode for a four-antenna port; and reporting the channel state information on the basis of the subsampled first codebook and second codebook, wherein a second codebook index for the second pmi may have any one index from a first index group if the first codebook index for the first pmi is an odd number, and if same is an even number, may have any one index from a second index group..
Lg Electronics Inc.

Beamforming signaling in a wireless network

A wireless receives at least one channel state input information element (ie) from a first base station. The wireless device computes a precoding matrix indicator (pmi) employing, at least in part, the at least one channel state input ie and measurement of signals received from a second base station.
Comcast Cable Communications, Llc

Method and transmitting channel state information in wireless communication system

The present invention relates to a wireless communication system. According to one embodiment of the present invention, a method for transmitting, by a terminal, channel state information (csi) in a wireless communication system comprises the steps of: subsampling a code book for four antenna ports, including sixteen precoding matrixes; and feeding back the csi on the basis of the subsampled code book, wherein the csi includes at least one of a rank indicator (ri), a precoding matrix indicator (pmi) and a channel quality indicator (cqi), and if the ri is 3, the subsampled code book can be determined so as to minimize a chordal distance between subsampled code words..
Lg Electronics Inc.

Linear precoding in full-dimensional mimo systems and dynamic vertical sectorization

Certain aspects of the present disclosure provide methods and apparatus for linear precoding in full-dimensional mimo (fd-mimo) systems. According to aspects, an enb may compress a larger number of antenna elements to a smaller number of antenna ports.
Qualcomm Incorporated

Transmission modes and signaling for uplink mimo support or single tb dual-layer transmission in lte uplink

An apparatus for mapping data in a wireless communication system. The apparatus includes circuitry for generating a precoding matrix for multi-antenna transmission based on a precoding matrix indicator (pmi) feedback from at least one remote receiver where the pmi indicates a choice of precoding matrix derived from a matrix multiplication of two matrices from a first code book and a second codebook.
Texas Instruments Incorporated

Method for determining precoding matrix indicator, user equipment, and base station

The present invention provides a method for determining a precoding matrix indicator, user equipment, and a base station. The method includes: receiving a first reference signal set sent by a base station; determining, based on the first reference signal set, one or more intermediate matrices, and reporting, to the base station, a first index used to indicate the intermediate matrix; receiving a second reference signal set sent by the base station; and determining, based on the second reference signal set, a precoding matrix, and reporting, to the base station, a precoding matrix indicator used to indicate the precoding matrix, where the precoding matrix is a product w of two matrices w1 and w2, and w=w1w2, where w1 is a block diagonal matrix, w1=diag{x1,x2}.
Huawei Technologies Co., Ltd.

Method for determining precoding matrix indicator, user equipment, and base station

A method for determining a precoding matrix indicator, user equipment, and a base station are disclosed in embodiments of the present invention. The method includes: receiving a first reference signal set sent by a base station, where the first reference signal set is associated with a user equipment-specific matrix or matrix set; selecting a precoding matrix based on the first reference signal set, where the precoding matrix is a function of the user equipment-specific matrix or matrix set; and sending a precoding matrix indicator to the base station, where the precoding matrix indicator corresponds to the selected precoding matrix.
Huawei Technologies Co., Ltd.

Precoding techniques for optimized channel capacity in mimo systems

A method of deriving a precoding matrix for a mimo signal operates by maximising a function of channel capacity over values of precoding matrices so as to maximise the minimum channel capacity for the set of channel realisations. In this way, the least worst channel capacity may be achieved in broadcast arrangements in which the actual channel may be unknown..
British Broadcasting Corporation

Layer alignment multilayer three-dimensional beamforming in wireless communication system

A method for transmitting feedback information for fractional beamforming using a massive antenna array from a user equipment (ue) to a base station (bs) in a wireless communication system is disclosed. The method includes receiving information about a plurality of reference signal (rs) resources from the bs; selecting at least one of a sub-precoder for at least one rs resources, and one linking precoder for linking the rs resources, based on a preset codebook; and reporting information about the selected precoder to the bs.
Lg Electronics Inc.

Method, user equipment and base station for determining precoding matrix indicator

The present disclosure discloses a method, a user equipment and a base station for determining a pmi. The method includes: receiving a reference signal set sent by a base station; based on the reference signal set, selecting a precoding matrix from a codebook, the codebook at least including a non-constant modulus precoding matrix, the non-constant modulus precoding matrix at least including a non-constant modulus column vector, amplitude values of at least two elements of the non-constant modulus column vector forming a symmetrical sequence; and sending a pmi to the base station, the pmi corresponding to the selected precoding matrix.
Huawei Technologies Co., Ltd.

Huawei Technologies Co., Ltd.

. .

Transmission apparatus and massive multi-antenna system

The present invention relates to a method and apparatus for supporting multi-users using a massive mimo technology in an fdd environment. A communication method of a ue in a mimo system according to an embodiment of the present invention may comprise: estimating a channel; calculating a first precoding matrix indication having a minimum correlation with the estimated channel; and transmitting the calculated first precoding matrix indication to a bs.
Industry-academic Cooperation Foundation, Yonsei University

Precoding matrix indicator feedback method, receive end, and transmit end

And the first antenna group and the second antenna group belong to a same multi-antenna system; and sending, by the receive end, a precoding matrix indicator (pmi) to the transmit end. In this way, using the coefficient α to perform the phase adjustment on φn can increase a size of a codebook set applicable to different antenna configurations, and improve precision of the receive end to feed back a pmi..

Method for determining precoding matrix indicator, user equipment, and base station evolved nodeb

The present invention relates to a method for determining a precoding matrix indicator, a user equipment ue, a base station enb, and a system. The method includes: receiving a reference signal sent by a base station; selecting, based on the reference signal, a precoding matrix from a codebook, where a precoding matrix w included in the codebook is a product of two matrices w1 and w2, where w1 is a block diagonal matrix, where each block matrix is a kronecker product of a matrix ai and a matrix bi; and sending a precoding matrix indicator pmi to the base station, where the pmi corresponds to the selected precoding matrix, so that the base station obtains the precoding matrix according to the pmi..
Huawei Technologies Co., Ltd.

Interference cancellation user equipment in cellular communication system

An interference cancellation method and apparatus of user equipment in a cellular communication system is provided. The method includes receiving signals including a desired signal and an interference signal from one or more base stations; determining a maximum likelihood (ml) decision metric to determine a value “l” of a rank indicator (ri), a value “p” of a precoding matrix indicator (pmi), and a value “q” of a modulation (mod) level of the interference signal; applying a logarithm to the ml decision metric, and applying a maximum-log approximation to a serving data vector and an interference data vector, which are included in the ml decision metric; determining the values of “l,” “p,” and “q” using the applied ml decision metric; and cancelling the interference signal from the received signals using the determined values of “l,” “p,” and “q.”.
Samsung Electronics Co., Ltd.

Method and device for reporting channel state information in wireless communication system

The present invention relates to a wireless communication system and, more specifically, to a method and device for reporting channel state information (csi). The method by which a terminal in a wireless communication system reports csi, according to one embodiment of the present invention, can comprise the steps for: receiving a reference signal from a base station; and reporting, to the base station, the csi generated by using the reference signal.
Lg Electronics Inc.

Method for reporting channel state information, user equipment, and base station

Embodiments of the present invention provide a method includes: receiving a reference signal sent by a base station; selecting, based on the reference signal, a precoding matrix from a codebook, where a precoding matrix w included in the codebook is a product of three matrices being w1, z, and w2, that is, w=w1zw2, where both w1 and z are block diagonal matrices, w1=a formula (i), z=a formula (ii), each of w1 and z includes at least one block matrix, that is, nb≧1, and each column of each block matrix zi in the matrix z has the following structure formula (iii); and sending a precoding matrix indicator (pmi) to the base station, where the pmi corresponds to the selected precoding matrix, and is used by the base station to obtain the selected precoding matrix w according to the pmi.. .
Huawei Technologies Co., Ltd.

Reference signal measurement use in wireless communication system including plural base stations with distributed antennas

An apparatus and a method of measuring a reference signal for efficient downlink transmission in a mobile communication system are provided. The system includes plural base stations, each having a plurality of antennas distributed in the service area thereof based on a distributed antenna system (das).
Samsung Electronics Co., Ltd.

Codebook sub-sampling for csi feedback on pucch for 4tx mimo

Channel state information (csi) feedback in a wireless communication system is disclosed. User equipment transmits a csi feedback signal via a physical uplink control channel (pucch).
Texas Instruments Incorporated

Transmission method, transmitter apparatus, reception method and receiver apparatus

Transmission quality is improved in an environment in which direct waves dominate in a transmission method for transmitting a plurality of modulated signals from a plurality of antennas at the same time. All data symbols used in data transmission of a modulated signal are precoded by hopping between precoding matrices so that the precoding matrix used to precode each data symbol and the precoding matrices used to precode data symbols that are adjacent to the data symbol in the frequency domain and the time domain all differ.
Panasonic Intellectual Property Corporation Of America

System and multiplexing on an lte uplink control channel

A wireless communication network comprising a plurality of base stations capable of wireless communication with a plurality of subscriber stations within a coverage area of the network, wherein at least one of the plurality of base stations is capable of: determining a multiplexing scheme for multiplexing a frequency-selective channel quality information/precoding matrix index (fs cqi/pmi) feedback report with a wideband channel quality information/precoding matrix index (wb cqi/pmi) feedback report and a rank information (ri) report on a physical uplink control channel; transmitting the multiplexing scheme to a subscriber station; and receiving, from the subscriber station, an fs cqi/pmi feedback report multiplexed with a wb cqi/pmi feedback report and a ri report on the physical uplink control channel according to the multiplexing scheme.. .
Panasonic Intellectual Property Management Co., Ltd.

Method for reporting and receiving channel state information, and device

Embodiments of the present invention provide a method for reporting and receiving channel state information (csi), and a device. The reporting method includes: acquiring reference signal resource configuration information, where antenna port configuration information in the reference signal resource configuration information is used to indicate an antenna port structure; receiving, according to the reference signal resource configuration information, a reference signal sent by a base station; selecting a precoding matrix from a codebook based on the received reference signal, where a structure of the precoding matrix corresponds to the antenna port structure indicated by the antenna port configuration information; and reporting, to the base station, a pmi used to indicate the selected precoding matrix.
Huawei Technologies Co., Ltd.

Method and configuring channel quality indicator and configuring modulation and coding scheme

Embodiments of the present disclosure provide a method and apparatus for configuring channel quality indicator (cqi) and a method and apparatus for configuring modulation and coding scheme. The method for configuring cqi includes: configuring ue with a cqi index table by an enb via cqi index table indication information, so that the ue determines the configured cqi index table according to the indication information, and calculates a cqi index according to calculated precoding matrix indicator (pmi) and rank indication (ri) by using the configured cqi index table.
Fujitsu Limited

Method and transmitting and receiving feedback information in a mobile communication system

A method and user equipment for transmitting channel state information (csi) are provided. The method includes identifying a first csi configuration with a first information for a period and an offset; identifying a second csi configuration with a second information for a period and an offset; generating a first csi for the first csi configuration, the first csi including at least one of a rank indicator (ri), a channel quality indicator (cqi), a precoding matrix indicator (pmi), and a precoding type indicator (pti); generating a second csi for the second csi configuration, the second csi including at least one of a ri, a cqi, a pmi, and a pti; and reporting a csi for a csi configuration among the first csi configuration and the second csi configuration based on a type of the csi, in case of collision between report of the first csi for the first csi configuration and report of the second csi for the second csi configuration, wherein a type of a csi with wideband cqi has lower priority than a type of a csi with ri..
Samsung Electronics Co., Ltd.

Method and transmitting and receiving codebook subset restriction bitmap

A method for transmitting and receiving a codebook subset restriction bitmap is provided. The codebook subset restriction (csr) bitmap transmission method of an evolved node b (enb) in transmission mode 9 for communication with 8 antenna ports includes generating a csr bitmap including bits corresponding to restricted precoding matrix indicators and rank indicators that are not allowed for reporting and transmitting the csr bitmap to a user equipment (ue).
Samsung Electronics Co., Ltd.

Method and managing control channel in a mobile communication system using multiple antennas

Methods and apparatuses are provided for receiving control information by a terminal. A control channel message is received on a control channel.
Samsung Electronics Co., Ltd.

4tx codebook enhancement in lte

Channel state information (csi) feedback in a wireless communication system is disclosed. A precoding matrix is generated for multi-antenna transmission based on precoding matrix indicator (pmi) feedback, wherein the pmi indicates a choice of precoding matrix derived from a matrix multiplication of two matrices from a first codebook and a second codebook.
Texas Instruments Incorporated

Method and transmitting channel state information in wireless communication system

The present invention relates to a wireless communication system. A method for a terminal for transmitting channel state information (csi) in a wireless communication system according to an embodiment of the present invention comprises the steps of: in a reporting mode for a four-antenna port, joint-encoding a rank indicator (ri) and a first precoding matrix indicator (pmi) into a single encoding value; and transmitting channel state information comprising the encoding value, wherein if ri is 1, then a codebook index may have the same value as the encoding value, and if ri is 2, then the codebook index may be less than the encoding value by 8..
Lg Electronics Inc.

Method and reporting downlink channel state

A method and apparatus for reporting a downlink channel state to a serving base station (bs) at a user equipment (ue) in a wireless communication system in which each of n (n is an integer equal to or larger than 2) bss transmits one or more independent layers to the ue are disclosed. The method includes receiving configuration information about a channel state information reference signal (csi-rs) process including csi-rs resource i (i=0, .
Lg Electronics Inc.

Method for adjusting parameters of sending device and receiving device, and terminal device

The present invention discloses a method for adjusting parameters of a sending device and a receiving device, and a terminal device. In the method, a new precoding parameter that needs to be used by a sending device on a line when a precoding matrix in a downlink direction of the line changes, and a new signal recovery parameter that needs to be used by a receiving device and matches the new precoding parameter are first acquired; and then the new precoding parameter, the new signal recovery parameter, and a set moment and/or symbol at which the sending device starts to use the new precoding parameter are sent to the sending device, and the new signal recovery parameter and the set moment and/or symbol are sent to the receiving device by using the sending device..
Huawei Technologies Co., Ltd.

User equipment and methods for codebook subsampling for enhanced 4tx codebooks

Embodiments of user equipment (ue) and methods for codebook subsampling for enhanced 4tx codebooks in 3gpp lte wireless networks are generally described herein. In some embodiments, a physical uplink control channel (pucch) is configured for transmission of channel state information (csi) feedback including a rank indicator (ri) and a precoding matrix (w1).