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This page is updated frequently with new Multiple Input Multiple Output-related patent applications.




 Pilot time slot hopping patent thumbnailnew patent Pilot time slot hopping
Embodiments are directed to systems, methods and computer program products for pilot time slot hopping to mitigate interference-based pilot time slot contamination. Embodiments include generating a multiple input multiple output (mimo) system message frame structure comprising a header comprising a plurality of header time slots, an uplink (ul) time slot (optional), and a downlink (dl) time slot.
Sony Corporation


 Method for antenna array with steerable spotlight beams patent thumbnailnew patent Method for antenna array with steerable spotlight beams
Cellular array implementations with multiple steerable spotlight beams irradiated from a common aperture are disclosed herein. Such an approach can easily be adapted to suit various geographical population densities and distributions.
Huawei Technologies Co., Ltd.


 Communication method and apparatus using analog and digital hybrid beamforming patent thumbnailCommunication method and apparatus using analog and digital hybrid beamforming
A communication method and apparatus using analog and digital hybrid beamforming are provided. The method includes receiving a first message including a measurement and selection condition for hybrid beamforming from a base station (bs), measuring channels of a plurality of bs transmission beams, selecting at least one bs transmission beam based on channel measurements, transmitting report information about the selected at least one bs transmission beam to the bs, receiving from the bs a second message, estimating an effective channel matrix for the selected final bs transmission beam according to the measurement and report condition, determining feedback information for digital beamforming of the bs based on the effective channel matrix, transmitting the determined feedback information to the bs, and receiving a data burst from the bs according to a multiple input multiple output (mimo) mode and/or a configuration scheduled based on the feedback information..
Samsung Electronics Co., Ltd.


 Explicit feedback format within single user, multiple user, multiple access, and/or mimo wireless communications patent thumbnailExplicit feedback format within single user, multiple user, multiple access, and/or mimo wireless communications
Explicit feedback format within single user, multiple user, multiple access, and/or mimo wireless communications. A beamformer provides a first communication to a beamformee, and based thereon, the beamformee may ascertain certain characteristics associated with the type and format of feedback to be provided to the beamformee via a second communication from the beamformee to the beamformer.
Broadcom Corporation


 Apparatus and  performing user terminal selection operation and beam forming operation in wireless communication system supporting mimo technology patent thumbnailApparatus and performing user terminal selection operation and beam forming operation in wireless communication system supporting mimo technology
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 a long term evolution (lte). A method of transmitting feedback information by a receiving apparatus in a wireless communication system supporting a multiple input multiple output (mimo) scheme is provided.
Korea Advanced Institute Of Science And Technology


 Adaptive time diversity and spatial diversity for ofdm patent thumbnailAdaptive time diversity and spatial diversity for ofdm
An adaptable orthogonal frequency-division multiplexing system (ofdm) that uses a multiple input multiple output (mimo) to having ofdm signals transmitted either in accordance with time diversity to reducing signal fading or in accordance with spatial diversity to increase the data rate. Sub-carriers are classified for spatial diversity transmission or for time diversity transmission based on the result of a comparison between threshold values and at least one of three criteria.
Apple Inc.


 Apparatus for and  channel quality prediction through computation of multi-layer channel quality metric patent thumbnailApparatus for and channel quality prediction through computation of multi-layer channel quality metric
An apparatus and method for a transceiver are provided. The apparatus for the transceiver includes a multiple input multiple output (mimo) antenna; a transceiver connected to the mimo antenna; and a processor configured to measure channel gain hk, based on the received signal, where k is a sample index from 1 to k, hk is an m×n matrix of complex channel gain known to the transceiver, measure noise variance σ2 of a channel, calculate a per-sample channel quality metric q(hk, σ2) using at least one bound of mutual information; reduce a dimension of a channel quality metric vector (q(h1, σ2), .
Samsung Electronics Co., Ltd.


 Method and  multiple frame transmission for supporting mu-mimo patent thumbnailMethod and multiple frame transmission for supporting mu-mimo
A method of multi user multiple input multiple output (mimo) communication in a wireless local area network (wlan) system; and a transmitting device therefore are discussed. The method according to an embodiment includes generating an aggregate-medium access control protocol data unit (a-mpdu) including an a-mpdu subframe, the a-mpdu subframe including a medium access control protocol data unit (mpdu) delimiter field; and selecting a type of a guard interval.
Lg Electronics Inc.


 Point-to-multipoint microwave communication patent thumbnailPoint-to-multipoint microwave communication
A microwave communication system may include subscriber stations in communication with a base station. The stations may include time duplex circuitry normally found in wireless local area networks (wlans).
Skyriver Communications, Inc.


 Channel-state-information reference signals for advanced wireless systems patent thumbnailChannel-state-information reference signals for advanced wireless systems
A mobile station includes a receiver configured to receive containing a complex-valued modulation symbol from a base station, a processor configured to extract the complex-valued modulation symbol from the signal, wherein in response to being configured with code-division multiplex-4 (cdm-4), the complex-valued modulation symbol is mapped using a reference signal sequence. A base station includes a processor configured to generate a reference signal sequence for each subcarrier and ofdm symbol, and in response to being configured with code-division multiplex-4 (cdm-4), map a reference signal sequence to the complex-valued modulation symbols.
Samsung Electronics Co., Ltd


Reference signal transmission downlink multiple input multiple output system


A reference signal transmission method in a downlink mimo system is disclosed. The downlink mimo system supports a first ue supporting n transmission antennas among a total of m transmission antennas (where m>n) and a second ue supporting the m transmission antennas.
Lg Electronics Inc.


Channel state information acquisition and feedback for full dimension multiple input multiple output


Various communication systems may benefit from feedback related to communication conditions. For example, certainly wireless communication systems may benefit from channel state information acquisition and feedback, particularly in connection with, for example, full dimension multiple input multiple output.
Nokia Solutions And Networks Oy


Method and apparatus of link adaptation in wireless local area network


A method of link adaptation performed by an access point supporting multi user (mu) multiple input multiple output (mimo) in wireless local area network system is provided. The method includes transmitting, to a first station, a physical layer convergence procedure (plcp) protocol data unit (ppdu) containing a modulation and coding scheme (mcs) request (mrq) and receiving, from the first station, a mcs feedback (mfb) in response to the mrq, wherein the first station is one of destination stations of mu-mimo transmission performed by the access point, and the mfb includes a recommended mcs value computed, by the first station, on the assumption that the first station, as a member of the destination stations, receives data transmitted over at least one spatial stream allocated to the first station in mu-mimo transmission..
Lg Electronics Inc.


Multiple-input multiple-output (mimo) antenna


A multiple input multiple output (mimo) antenna is provided. The mimo antenna may include, but is not limited to, a printed circuit board having a plurality of edges and a ground layer including, but not limited to a plurality of antenna element mounting locations, at least one of the plurality of antenna element mounting locations being arranged on a first side of the printed circuit board and at least one of the plurality of antenna element mounting locations being arranged on a second side of the printed circuit board, a plurality of slots, each of the plurality of slots extending a predetermined distance from an edge of the printed circuit board, and at least one ground stub, the at least one ground stub comprising an extension of the ground layer of a predetermined electrical length at a predetermined angle relative to the edge of the printed circuit board..
Galtronics Corporation Ltd.


Uplink training for mimo implicit beamforming


In a method for beamforming in a multiple input multiple output (mimo) communication system, a data unit is received from a communication device via a mimo communication channel, and it is determined whether the data unit satisfies one or more selection criteria. Further, when it is determined that the data unit satisfies the one or more selection criteria, the data unit is selected to be used in developing a steering matrix for transmitting data units to the communication device..
Marvell World Trade Ltd.


Beam modulation and demodulation method and apparatus based on beam-space multiple input multiple output (mimo) antenna system


Provided is a beam modulation and demodulation method and apparatus based on a beam-space multiple input multiple output (mimo) antenna system, the beam modulation method including generating a preparatory beam list including a plurality of beams, generating a beam combination table of beam combinations of beams selected from the preparatory beam list, generating a beam modulation rule to map the beam combinations and bit data patterns, and determining a beam combination corresponding to input data from the beam combination table based on the beam modulation rule.. .
Korea Advanced Institute Of Science And Technology


Method and base station for mu-mimo transmission in wireless communication system


The present disclosure provides a method and base station for multiple user-multiple input multiple output (mu-mimo) transmission in a wireless communication system. The base station re-allocates frequency resources of a dmrs port which are allocated to n first data flows to m second data flows, wherein m is greater than n, and n first data flows may be used by n first ues or less than n first ues.
Ntt Docomo, Inc.


Spatial null creation using massive mimo (m-mimo)


In a base station having a massive multiple input multiple output (m-mimo) antenna array, the availability of the m-mimo antenna array is exploited to manage the interference caused by the base station to neighboring cells. In one embodiment, the large number of antenna elements of the m-mimo antenna array are used to create precise transmit and/or receive spatial nulls at specific user equipments (ues) being served by a neighboring cell and/or in select areas of the neighboring cell.
Broadcom Corporation


Cellular array with steerable spotlight beams


Cellular array implementations with multiple steerable spotlight beams irradiated from a common aperture are disclosed herein. Such an approach can easily be adapted to suit various geographical population densities and distributions.

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Method, apparatus and system for electrical downtilt adjustment in a multiple input multiple output system


Machine-readable media, methods, apparatus and system for electrical downtilt adjustment in a multiple input multiple output system are disclosed. In some embodiments, an apparatus may comprise an electrical downtilt module to determine an electrical downtilt angle for an antenna port selected from a number of antenna ports based on information from an user equipment (ue); and a codebook module to select a codeword corresponding to the antenna port from a codebook and calculate a weight of an antenna array of the enb through inputting the electronic downtilt angle into the codeword, wherein the codebook has a first number of codewords, each of the codewords having a second number of elements to represent the weight of the antenna array, and wherein each of the codewords corresponds to each of the antenna ports and each of the elements corresponds to each antenna of the antenna array..

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.

Delay estimation multiple input multiple output communications system, and system


A delay estimation method for a multiple input multiple output communications system, includes: calculating, by a receiver, a channel response matrix of a multiple input multiple output mimo communications system, where there are n transmit channels and m receive channels in the mimo communications system, n≧2, m≧2, and the channel response matrix includes channel responses of n*m sub-channels; calculating, by the receiver, an integer delay, relative to a reference sub-channel, of each of the n*m sub-channels according to the channel response matrix, where the reference sub-channel is any sub-channel in the n*m sub-channels; calculating, by the receiver, fraction delays of the n*m sub-channels according to the channel response matrix; and separating out, by the receiver, delays of the m receive channels according to delays of the n*m sub-channels.. .
Huawei Technologies Co., Ltd.


Apparatus and transmitting and receiving of cyclic shift parameter for supporting orthogonality in mimo environment


A method includes: determining a cyclic shift (cs) parameter that implicitly indicates an orthogonality allocation rule and orthogonality-related information, by determining a multiple access state of a user equipment (ue), and transmitting the determined cs parameter to the ue, wherein the orthogonality-related information includes an orthogonal cover code indicated by the cs parameter, the orthogonality allocation rule is determined as a uniform scheme or a non-uniform scheme according to the cs parameter, determining the cs parameter by which the non-uniform scheme is applied if the ue is in a single user multiple input multiple output state, and determining the cs parameter by which the uniform scheme is applied if the ue is in a multiple user multiple input multiple output state.. .
Pantech Co., Ltd.


Method and base station for csi process configuration and method and user equipment for csi feedback


The present disclosure provides a method in a base station for channel state information (csi) process configuration and an associated base station. The method comprises: setting csi process information for a user equipment (ue) supporting three dimensional (3d) multiple input multiple output (mimo), the csi process information including at least an index of a csi reference signal resource (csi-rs-r) for a vertical direction of a 3d mimo antenna array; and transmitting the set csi process information to the ue.
Sharp Kabushiki Kaisha


Method and implementing wireless body area network


Disclosed are a method and apparatus for implementing a wireless body area network (wban). The present invention relates to multiple input multiple output mimo technologies; and more particularly to a method and apparatus for implementing a wireless body area network.
Zte Corporation


Method for transmitting and receiving physical layer convergence procedure protocol data unit in wireless local area network system supporting power save mode operation and the same


A method of transmitting a data frame in a wireless local area network (wlan) is provided. The method includes transmitting, by an access point (ap), a scheduling information element including information on a time period for data frame transmission to a first station (sta) and a second sta, wherein the scheduling information element includes an offset field indicating a start time point of the time period and transmitting, by the ap, the data frame to the first sta and the second sta by using a multi user-multiple input multiple output (mu-mimo) transmission scheme after the start time point indicated by the offset field..
Lg Electronics Inc.


Method and reporting feedback information for multi-carrier operation


Method and apparatus for reporting feedback information for multi-carrier operation are disclosed. A wireless transmit/receive unit (wtru) is configured with multiple carriers.
Interdigital Patent Holdings, Inc.


Method for transmitting reference signals in a downlink multiple input multiple output system


A method for transmitting a reference signal for channel measurement (csi-rs) to a user equipment; a base station therefore; a method for receiving a csi-rs; and the user equipment therefore are discussed. The method for transmitting a csi-rs according to one embodiment includes transmitting csi-rs pattern information for indicating a pattern of time-frequency resource to be nulled, hereinafter referred to as null csi-rs pattern, and csi-rs subframe information for indicating in which subframe the null csi-rs pattern occurs; and nulling a time-frequency resource corresponding to the null csi-rs pattern in a subframe corresponding to the csi-rs subframe information, hereinafter referred to as null csi-rs subframe, based on the csi-rs pattern information and the csi-rs subframe information.
Lg Electronics Inc.


Method for uplink multiuser data transmission and system for uplink multiuser multiple input multiple output


The embodiments of the present disclosure disclose a method for uplink multiuser data transmission and a system for uplink multiuser multiple input multiple output. The method includes: sending, by an access point ap, indication information to at least two stations stas, wherein the indication information is used for indicating that the at least two stas perform an uplink multiuser data transmission; receiving, by the ap, uplink data sent by the at least two stas through channels from the at least two stas to the ap, respectively; and demodulating, by the ap, the uplink data sent by the at least two stas using receiving beams corresponding to pre-estimated channels from the at least two stas to the ap, respectively.
Huawei Technologies Co., Ltd.


Antenna isolator


An antenna, including, but not limited to, a multiple input multiple output antenna is provided. The antenna may include, but is not limited to, a transmission array configured to radiate in a first frequency range, the transmission array including a plurality of dipoles, and an isolator located between the plurality of dipoles of the transmission array, the isolator including at least one conductive strip..
Galtronics Corporation Ltd.


System and multi-user multiple input multiple output communications


A method for operating a communications controller in a wireless communications system includes scheduling a pair of user equipments (ue) located in different ones of a plurality of split beams using an appropriate code pair that produces the plurality of split beams for multi-user multiple-input multiple output (mu-mimo) mode transmission, and transmitting data packets to the pair of ues in accordance with the appropriate code pair.. .
Futurewei Technologies, Inc.


Method and processing uci and transmission thereof based on mimo system


The present invention provides a method and apparatus for processing uplink control information (uci) and a method for transmitting the uci based on a multiple input multiple output system, which processing method comprises: repeating ack/nack source bits and/or rank indicator (ri) source bits in the uplink control information to form m groups, with each group corresponding to a code word (s302), wherein m is the total number of code words; carrying out channel encoding on the ack/nack source bits and/or ri source bits of each code word to obtain qack*li output bits (s304), wherein qack is the channel encoding output bits corresponding to each layer in a certain code word, l is the total number of layers, and the layer number corresponding to the i-th code word is li; and multiplexing and interleaving the output bits and the data bits of the corresponding code word (s306). The present invention solves the problems of transmission and channel encoding of the ack/nack and/or ri in the multiple input multiple output (mimo) system, and at the same time takes into account high load situations and backward compatibility..
China Academy Of Telecommunications Technology


Method for transmitting and receiving data unit based on uplink multiple user multiple input multiple output transmission and the same


In an aspect, a method of receiving a data unit, performed by an access point (ap), in a wireless lan (wlan) system is provided. The method includes transmitting a signal protection frame, the signal protection frame comprising a group id field indicating a multiple input multiple output (mimo) transmission sta group including a first station (sta) and a second sta; and, a spatial stream field indicating a number of spatial streams allocated to each of member stas included in the mimo transmission sta group; receiving a first preamble for a first data unit from the first sta; receiving a second preamble for a second data unit from the second sta; and simultaneously receiving the first data unit from the first sta and the second data unit from the second sta..
Lg Electronics Inc.


Method and transmitting reference signal, measuring and reporting channel state information, and configuring the same


A method in which a base station transmits a csi (channel state information)-rs (reference signal) in a mimo (multiple input multiple output) antenna system is provided. The base station periodically transmits a csi-rs for first csi to a terminal.
Electronics And Telecommunications Research Institute


Sub-band feedback for beamforming on downlink multiple user mimo configurations


A method in a communication network includes an access point, using a multiple input multiple output antenna configuration, sending out a sounding packet to a plurality of client stations. The client stations determine a channel estimation of the sounding packet, but only a channel estimation of a portion of the entire sounding packet to avoid processing the entire packet.
Marvell World Trade Ltd.


Equalization in the receiver of a multiple input multiple output system


Embodiments of the invention concern a method of equalizing (s9), in a turbo equalizing system (s10), by sphere decoding (s11) a signal transmitted over a channel by a multiple input multiple output system, comprising: receiving (s3) said transmitted signal, building (s4) at least one search tree, providing (s6) likelihoods of bits, for said transmitted signal, from said built search tree(s) and from said received transmitted signal, wherein equalizing method (s9) also comprises receiving feedback signal from a channel decoder (s8) of said turbo equalizing system (s10), and wherein said feedback signal is used to build (s4) said search tree(s).. .
Telefonaktiebolaget L M Ericsson (publ)


Dual qr decomposition decoder for spatially multiplexed mimo signals


Wireless communication systems employ multiple input multiple output (mimo) transmission and reception schemes to increase performance and the data rate of the system. A new approach for an sm-mimo decoder that operates on the received symbols in parallel is presented.
Mbit Wireless, Inc.


Transmission apparatus, transmission method, and wireless communication system for orthogonal cover code (occ) generation and occ mapping


A base station which performs multiple input multiple output (mimo) transmission. A processor configured to generate reference signals by spreading with four groups of orthogonal code sequences, each group of orthogonal code sequences including four orthogonal sequences, wherein the orthogonal code sequences correspond to transmission layers and each of the orthogonal code sequences has a length of four, and a transmit circuit configured to transmit the reference signals.
Fujitsu Limited


Architecture and method in a wireless communication network


Radio network node comprises a plurality of antenna sub arrays, forming a multiple antenna array which is configured for beamforming, spatial multiplexing and multiple input multiple output, mimo, transmission/reception, and further comprising an antenna base band processing unit and a central base band processing unit. The radio network node further comprises a plurality of antenna active modules, wherein each active antenna module is connected to one of the antenna sub arrays, comprised in the multiple antenna array, and wherein each active antenna module is configured for pre-processing of signals over the respective antenna sub array, before any forwarding of signals is made to the central base band processing unit..
Huawei Technologies Co., Ltd.


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Distributed antenna system for mimo signals


A distributed antenna system includes a master unit configured to receive at least one set of multiple input multiple output (mimo) channel signals from at least one signal source. The master unit is configured to frequency convert at least one of the mimo channel signals to a different frequency from an original frequency, and combine the mimo channel signals for transmission.
Commscope Technologies Llc


Coexistent channel access method


A method is provided for transmitting a multiple input multiple output (mimo) packet in a wireless local area network. A physical layer convergence procedure (plcp) protocol data unit (ppdu) is generated including at least one training field, a very high throughput (vht)-signal field and a plurality of data streams.

Method and generating common signal in multiple input multiple output system


Provided is a method for generating, by a base station, a common signal commonly required for surrounding terminals of the base station in a massive multiple input multiple output (mimo) system. The base station generates data commonly required for the surrounding terminals.

Codebook for full-dimension multiple input multiple output communications


Various embodiments include an apparatus to be employed by an enhanced node b (enb), the apparatus comprising communication circuitry to receive, from a user equipment (ue), feedback information and control circuitry, coupled with the communication circuitry, to identify a codeword from a three-dimensional codebook based on the feedback information received from the ue, wherein the communication circuitry is further to precode data to be transmitted to the ue based on the codeword. An apparatus to be employed by a ue and additional methods are described..
Intel Ip Corporation


Uplink multi-user multiple input multiple output for wireless local area network


A communication device of a client uplink group transmits an enhanced request to send (e-rts) message to an access point of a wireless local area network, wherein the e-rts message includes i) a length of a txop of the communication device and ii) an indication of a data unit size for an uplink mu-mimo data unit to be transmitted by the communication device simultaneously with transmissions of other members of the client uplink group. The communication device receives a communication frame from the access point, the communication frame including a prompt to transmit an uplink mu-mimo data unit having the indicated data unit size.
Marvell World Trade Ltd.


Simplified multiple input multiple output (mimo) communication schemes for interchip and intrachip communications


Aspects disclosed in the detailed description include simplified multiple input multiple output (mimo) communication schemes for interchip and intrachip communications. In exemplary aspects, mimo techniques are applied to interchip and intrachip communication systems.
Qualcomm Incorporated


Method and system for signaling transmission layers for single user and multi user mimo


A method and system to signal transmission layers or dedicated reference signal ports to be used in a multiple input multiple output system, the method including providing a downlink control signal containing information for transmission layers or dedicated reference signal ports utilized, the dedicated reference signal ports being associated with the transmission layers; and using the information to demodulate data on each transmission layer.. .
Blackberry Limited


Method and transmitting data streams in mimo system


A method for transmitting data streams in a multiple input multiple output (mimo) system is provided, where each data stream is mapped to multiple layers in an mimo channel space for transmission, and the method includes: performing inter-layer interleaving for n data streams to obtain n interleaved data streams; mapping the n interleaved data streams respectively to n layers in the mimo channel space, and transmitting the n interleaved data streams that are mapped to the n layers. By using the method of the present invention, a combined cqi can be used in a better way to improve mimo transmission performance.
Huawei Technologies Co., Ltd.


Codebook feedback multiple-antenna channel in mimo system


A codebook feedback method and apparatus for a multiple-antenna channel in a multiple input multiple output (mimo) system are provided. In an embodiment, a method (20) includes: detecting (21) a downlink multiple-antenna channel; determining (22) a first codeword in a first level codebook corresponding to the rank of r, where any codeword in the first level codebook is four diagonal matrices, two same 2×c block matrices exist on a diagonal line, and c column vectors of the 2×c block matrix are selected from q1 discrete fourier transform (dft) beam vectors; feeding back (23) an index of the first codeword; determining (24) a second codeword in a second level codebook corresponding to the rank of r, where any codeword in the second level codebook is a 2c×r matrix, each column of the 2c×r matrix is formed of one c×1 beam selection vector and one c×1 beam selection vector including phase offset information; and feeding back (25) an index of the second codeword.
Alcatel Lucent


Multiple input multiple output communications over nonlinear channels using orthogonal frequency division multiplexing


An ofdm receiver comprises a (fec) decoder and a nonlinearity compensation circuit. The nonlinearity compensation circuit is operable to generate estimates of constellation points transmitted on each of a plurality of subcarriers of a received signal based on soft decisions from the fec decoder and based on a model of nonlinear distortion introduced by a transmitter from which the received signal was received.
Magnacom Ltd.


Method and measuring channel quality in multiple input multiple output system


A method and an apparatus for measuring channel quality in a mimo system is provided. The method includes measuring a first sinr based on an assumption that a first detector is used, using a channel estimation value of a reception signal with respect to each of a plurality of space layers, and a second sinr for each of the plurality of space layers corresponding to a case where the plurality of space layers exist independently using the channel estimation value of the reception signal; determining a log likelihood ratio of reception data based on an assumption that a second detector is used, with respect to each of the plurality of space layers; and generating channel quality information based on an assumption that the second detector is used, based on the first sinr and the second sinr with respect to each of the plurality of space layers, and the llr..
Samsung Electronics Co., Ltd.


Methods and procedures for non-linear precoding based multiuser multiple input multiple output


A station is used to implement non-linear coding based multiuser multiple-input multiple-output (mu-mimo). The station includes a processor that may be configured to perform a number of actions.
Interdigital Patent Holdings, Inc.


Scattered pilot pattern and channel estimation mimo-ofdm systems


Methods and apparatus are provided for inserting data symbols and pilot symbols in an ofdm (orthogonal frequency division multiplexing) transmission resource utilizing frequency hopping patterns for the data symbols and/or the pilot symbols. Data symbols and pilot symbols are allocated for down link (base station to mobile station) and up link (mobile station to bases station) transmission resources in a two-dimensional time-frequency pattern.
Blackberry Limited


Method and operating a power save mode in a wireless lan system


A communication method that includes transmitting a power save multi-poll (psmp) frame containing a power save mode (psm) of a non-access point (ap) station (sta) to a first station and to a second station which are paired with an ap on the basis of multiple input multiple output (mimo) technology. Information on the psm indicates the point in time of starting a downlink transmission period, the duration of the downlink transmission period, and transmission object station identification information.
Lg Electronics Inc.


Multiple input multiple output (mimo) communication chip to chip and intrachip communication


multiple input multiple output (mimo) communication systems and methods for chip to chip and intrachip communication are disclosed. In one aspect, mimo techniques that have been applied to wireless communication systems are applied to interchip and intrachip communication systems.
Qualcomm Incorporated


Mimo antenna with elevation detection


A multiple input multiple output (mimo) antenna for a radar system includes a receive antenna, a first transmit-antenna-arrangement, and a second transmit-antenna-arrangement. The receive-antenna is configured to detect radar-signals reflected by a target toward the receive-antenna.
Delphi Technologies, Inc.


Method of reference signaling resource allocation for control channel transmission in wireless communication system


In legacy systems such as 3rd generation partnership project (3gpp) releases 8 to 10, the control channel is transmitted using the first few orthogonal frequency division multiplexing (ofdm) symbols in a subframe. The limited control channel capacity will impact the system performance in future releases as more and more user equipments (ues) will be scheduled in a subframe with technologies such as mulituser-multiple input multiple output (mu-mimo) and coordinated multipoint (comp) transmission being enhanced or introduced.
Samsung Electronics Co., Ltd.


Method of reference signaling resource allocation for control channel transmission in wireless communication system


In legacy systems such as 3rd generation partnership project (3gpp) releases 8 to 10, the control channel is transmitted using the first few orthogonal frequency division multiplexing (ofdm) symbols in a subframe. The limited control channel capacity will impact the system performance in future releases as more and more user equipments (ues) will be scheduled in a subframe with technologies such as mulituser-multiple input multiple output (mu-mimo) and coordinated multipoint (comp) transmission being enhanced or introduced.
Samsung Electronics Co., Ltd.


User equipment and base station


Techniques for providing codebooks extended by gain information that can be transmitted in a reduced amount of signaling are disclosed. One aspect of the present invention relates to a user equipment comprising: a transmission and reception unit configured to communicate a radio signal with a base station in accordance with mimo (multiple input multiple output) transmission; a codebook storage unit configured to store predefined codebooks to specify precoding matrices for use in the mimo transmission, wherein the codebooks are arranged to represent phase information and gain information; a channel measurement unit configured to measure channel conditions based on reference signals transmitted from multiple antennas in the base station; and a codebook selection unit configured to select a codebook to be indicated to the base station from the stored codebooks based on the measured channel conditions and instruct the transmission and reception unit to indicate feedback information to the base station, wherein the feedback information includes a codebook index for identifying the selected codebook..
Ntt Docomo, Inc.


A network node, a core network node, and methods therein


A method in a network node for sending a pilot power value in a heterogeneous mobile communications network. The heterogeneous mobile communications network comprises a second set of base station nodes selected to operate in a multiple input multiple output, mimo, -mode.
Telefonaktiebolaget L M Ericsson (publ)


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Method and system for ue measurements in support of mimo ota


A method of processing the measurements of the user equipment (ue) antenna pattern for multiple input multiple output (mimo) over-the-air (ota) testing consistent with the ue performing antenna pattern measurements using radiated test methods subsequent to conducted testing where the measured radiation pattern is then utilized. The method involves antenna pattern measurements which do not take into consideration the impact of radiated interference.
Zte (usa) Inc.


Method of enhancing system performance and related wireless module


The present disclosure provides a performance enhancement method for a multi-user multiple input multiple output (mimo) system. The performance enhancement method includes determining whether a connection node of a data stream matches when a transmission packet is waiting for transmission in the data stream, wherein the data stream is dedicated to serving a wireless subscriber, collecting a plurality of radio-frequency parameters and mimo information when the connection node matches, using a time-division multiple access (tdma) mechanism to divide the transmission packet into a plurality of sub-packets, applying space-time block code (stbc) to the sub-packets, and transmitting the encoded sub-packets in one data stream in different time instants..
Wistron Neweb Corporation


Antenna sharing device for wireless access node systems in wireless communication network


The present invention relates to a device for sharing the antennas of wireless access node systems in a wireless communication network comprising a wireless access node system a and a wireless access node system b, each of which comprises at least one transmission/reception unit for processing transmission/reception signals in at least one frequency band, the device comprising: an mimo coupler a for coupling a signal in a first transmission/reception route among multiple input multiple output (mimo) routes for said at least one transmission/reception unit of the wireless access node system a, and a signal in a second transmission/reception route among mimo routes for said at least one transmission/reception unit of the wireless access node system b, to the antenna of the wireless access node system a; and an mimo coupler b for coupling a signal in a first transmission/reception route among the mimo routes for said at least one transmission/reception unit of the wireless access node system b, and a signal in a second transmission/reception route among the mimo routes for said at least one transmission/reception unit of the wireless access node system a, to the antenna of the wireless access node system b.. .
Kmw Inc.


Method and transmitting management information frame in wireless local area network system


A method for reporting load information in a wireless local area network system, and a device therefore are discussed. The method according to one embodiment includes transmitting basic service set (bss) load information, the bss load information including a multi user (mu) multiple input multiple output (mimo) capable station count field, a first utilization field and a second utilization field.
Lg Electronics Inc.


Systems and methods for improved wireless channel estimation


Systems and methods are disclosed herein to provide improved channel estimation in a wireless data communication system, including but not limited to multiple input multiple output (mimo) communication systems. In accordance with one or more embodiments and aspects thereof, a channel estimation system is disclosed that utilizes data payload portions of received wireless packets to calculate estimates of the radio frequency (rf) channel traversed by these packets, and iteratively refines and improves these estimates by selectively utilizing successive received packets according to the application of certain metrics.
Ixia


Method and providing antenna configuration information for massive multiple input multiple output in a wireless communication system


A method for transmitting a reference signal for supporting a plurality of antennas to a user equipment (ue) at a base station (bs) in a wireless communication system is disclosed. The method includes grouping the plurality of antennas into antenna groups comprising a predetermined number of antenna ports, transmitting resource information about a reference signal for at least one antenna group of the antenna groups, and transmitting the reference signal for the at least one antenna group to the ue based on the resource information..
Lg Electronics Inc.


Flexible shielded antenna array for radiated wireless test


Systems and methods are disclosed herein to provide shielding and radio frequency (rf) antenna coupling for communication test systems for the testing of wireless data communication devices and systems, including multiple input multiple output (mimo) devices and systems. In accordance with one or more embodiments, a shielding and coupling system containing an array of rf antennas is disclosed that includes a flexible jacket integrated with rf shielding material that simultaneously isolates a device under test (dut) and couples signals from the antennas of the dut.
Ixia


Adaptive cross-radio access technology (rat) channel assignment


Systems and methods for channel assignment configuration in a multiple access point (ap) environment are provided. The multiple aps can be homogeneous or heterogeneous and can implement one or more radio access technologies (rats), including massive multiple input multiple output (m-mimo) rats.
Broadcom Corporation


Efficient large-scale multiple input multiple output communications


Methods and systems for beam forming, implemented in a base station used in a communication system, include measuring channel state information (csi) for a number of active phased-array antennas less than a full number of phased-array antennas. Analog beam forming weights are determined using the measured csi.
Nec Laboratories America, Inc.


Efficient large-scale multiple input multiple output communications


Methods and systems for beam forming include measuring channel state information for a set of different codebook entries. An angle of arrival (aoa) distribution is determined with a processor using compressive testing based on the measured channel state information.
Nec Laboratories America, Inc.


Signal sending method and signal sending device


The present invention provides a signal sending method and a signal sending device, where the signal sending method includes: canceling interference from symbols of a boundary between at least two precoding code blocks in a multiple input multiple output filter bank multicarrier mimo-fbmc system, where the precoding code block includes at least one time-frequency resource element that uses same precoding; performing precoding on a to-be-sent symbol in the precoding code block to obtain a precoded symbol; and sending the precoded symbol. In the present invention, mutual interference between precoding code blocks at a time-frequency critical location can be completely or partially canceled..
Huawei Technologies Co., Ltd.


Method for transmitting network assistance information for removing interference and serving cell base station


One embodiment of the present specification provides a method for transmitting network support information in a serving cell in order to remove interference of a terminal. The method for transmitting the network support information comprises the steps of: enabling the serving cell to select a first terminal and a second terminal to which a multi-user multiple input multiple output (mu-mimo) is applied; enabling the serving cell to select different codewords for a downlink data channel to the selected first and second terminals; enabling the serving cell to determine whether the first terminal can remove the interference; and transmitting, to the first terminal, the network support information for supporting the interference removal using the downlink data channel to the second terminal if the first terminal can remove the interference..
Lg Electronics Inc.


Method and system for ue measurements in support of mimo ota


A method of processing the measurements of the user equipment (ue) antenna pattern for multiple input multiple output (mimo) over-the-air (ota) testing consistent with the ue performing antenna pattern measurements using radiated test methods subsequent to conducted testing where the measured radiation pattern is then utilized. The method involves antenna pattern measurements which do not take into consideration the impact of radiated interference.
Zet (usa) Inc.


Multi-user multiple input multiple output wireless communications


Certain aspects of the present disclosure relate to a method for enhanced multi-user multiple input multiple output (mu-mimo) wireless communications. The proposed method may reduce and/or eliminate stringent frequency and time synchronization requirements for stations (stas) to participate in a downlink mu-mimo transaction by utilizing deterministic scheduling..
Qualcomm Incorporated


Methods and devices for mimo transmission


Methods and devices of controlling impact from interference from transmission to a 4-branch multiple input multiple output, mimo, enabled user equipment, ue, in a cellular radio system where legacy non 4-branch mimo ues co-exist are provided. The control involves determining an estimated channel quality indicator, cqi, delay, and based on the estimated cqi delay determining if there exists a cqi under-estimation or cqi over-estimation.
Telefonaktiebolaget L M Ericsson


Multiband mimo vehicular antenna assemblies with dsrc capabilities


Disclosed are exemplary embodiments of multiband multiple input multiple output (mimo) vehicular antenna assemblies for installation to a vehicle body wall. In exemplary embodiments, a multiband mimo vehicular antenna assembly generally includes at least one cellular antenna configured to be operable over one or more cellular frequencies (e.g., long term evolution (lte), etc.), at least one satellite antenna configured to be operable over one or more satellite frequencies (e.g., global navigation satellite system (gnss), satellite digital audio radio services (sdars), etc.) and at least one dedicated short range communication (dsrc) antenna configured to be operable over dsrc frequencies..
Laird Technologies, Inc.


Method, network node, and computer program for determining rank


It is presented a method for determining a rank indicating the number of layers to be used by a multiple input multiple output, mimo, transmitter in a mobile communication network, the method being executed in a network node of the mobile communication network. The method comprises the steps of: obtaining success measurements indicating whether data frames, comprising user data, have been successfully transmitted between the network node and a mobile communication terminal for each one of a plurality of ranks; determining usage frequencies for each one of the plurality of ranks based on the success measurements for the respective ranks; and determining the rank to be used for transmission between the network node and the mobile communication terminal based on the usage frequencies.
Telefonaktiebolaget L M Ericsson (publ)


Method and transmitting downlink signal in a mimo wireless communication system


A method and apparatus for transmitting a downlink signal in a multiple input multiple output (mimo) wireless communication system is disclosed. A method for receiving a downlink signal from a base station to a user equipment in a multiple input multiple output (mimo) system, which supports dual layer transmission based on first and second antenna ports, comprises receiving downlink control information (dci) through a downlink control channel; and receiving downlink data through a downlink data channel, the downlink data including one or more of a first transport block and a second transport block, wherein the downlink control information includes a new data indicator (ndi) for each of the first and second transport blocks, and if the first transport block is disabled and the second transport block is enabled, the new data indicator for the first transport block indicates an antenna port through which the second transport block is received..
Lg Electronics Inc.


Method and transmitting/receiving feedback information in a wireless packet data communication system


Methods and apparatuses are provided for transmitting feedback information in a communication system supporting multiple transmission methods with multi antenna transmission. Information for a default multiple input multiple output (mimo) mode is received.
Samsung Electronics Co., Ltd.


Uplink multi-user multiple input multiple output beamforming


As part of a beamforming training procedure, a first communication device transmits a beamforming training packet. The first device then receives a plurality of respective beamforming feedback packets from a plurality of second communication devices.
Marvell World Trade Ltd.


Multi-user multiple input multiple output wireless communications


A method implemented in a user equipment used in a wireless communications system is disclosed. The method comprises receiving from a base station an indication of a first modulation type for the user equipment, receiving from the base station a first data signal for the user equipment, receiving from the base station an indication of a minimum time-frequency unit that is assigned to another user equipment, receiving a second data signal for said another user equipment, where a second modulation type for said another user equipment is unknown to the user equipment, and cancelling and suppressing interference by using the minimum time-frequency unit.

Communication system and method using space division multi-user multiple input multiple output (sd-mimo) communication method


Provided is a communication system using a space division multi-user multiple input multiple output (sd-mimo) communication method. A transmission apparatus may transmit, to each of terminals included within a coverage, common control information commonly transmitted to the terminals and individual control information individually transmitted to each of the terminals.
Samsung Electronics Co., Ltd.


Power loading in mu-mimo


Embodiments of a system and method for transmitting data from an access point in a multiple user multiple input multiple output (mu-mimo) system are provided. A first indication of signal quality (isq) is received at the access point from a first station and a second isq is received from a second station.
Intel Corporation


Higher-order multiple input multiple output in ethernet


A method of mimo signal transmission on a cable is disclosed. The cable includes at least a first inner conductor, a second inner conductor, and an outer conductive shield.
Qualcomm Incorporated


Handling of stream restriction in a cellular communications system supporting four branch mimo


Methods, user equipment and controlling node for handling of stream restriction of the user equipment in a cellular communications system supporting four branch multiple input multiple output (mimo) are disclosed. The user equipment supports one or more mimo modes associated with four branch mimo and one or more of a single stream restriction, a dual stream restriction and no restriction.
Telefonaktiebolaget L M Ericsson (publ)


Channel state information for reporting an advanced wireless communications system


Multi-user channel quality, information (mu-cqi) indicating demodulation interference at the user equipment between co-channel signals within a multi-user, multiple input multiple output (mu-mimo) transmission is derived utilizing a demodulation interference measurement resource (dm-imr) and based upon a demodulation reference signal (dmrs). Derivation of signal, interference, and signal-plus-interference parts of the mu-cqi is configurable, as is the mu-cqi reporting, selection of physical resource blocks (prbs) to be employed, and periods, subframes and/or antenna ports for determining mu-cqi.
Samsung Electronics Co., Ltd.


Apparatus and channel feedback in multiple input multiple output system


An apparatus and a method for feeding a channel back in a wireless communication system using multiple input multiple output antennas (mimo) are provided. The method includes receiving a signal from a transmitter and configuring a channel matrix for the received signal, configuring a basis transformed sparse channel using a sparsifying basis function with respect to the channel matrix, selecting a channel part to be fed back to the transmitter from the transformed sparse channel, and creating a codebook by quantizing the selected channel part, and feeding a codebook index corresponding to the created codebook back to the transmitter..
Industry-academic Cooperation Foundation, Yonsei University


Mimo antenna with elevation detection


A multiple input multiple output (mimo) antenna for a radar system that includes a receive antenna, a first transmit antenna, and a second transmit antenna. The receive antenna is configured to detect radar signals reflected by a target toward the receive antenna.
Delphi Technologies, Inc.


Mimo antenna with improved grating lobe characteristics


A multiple input multiple output (mimo) antenna for a radar system that includes a first transmit antenna, a second transmit antenna, and a receive antenna. The first transmit antenna is configured to emit a first radar signal toward a target.
Delphi Technologies, Inc.


Adaptive transmission mode switching


A node (28) of a radio access network (20) communicates over a radio interface (32) with a wireless terminal (30). The node (28) comprises a transmitter (34) and a controller (40).
Telefonaktiebolaget L M Ericsson (publ)


Wireless radio access network control channel capacity management


Transmission capacity for a control channel sent to multiple mobile wireless devices in a wireless network is increased by transmitting the control channel using multi user multiple input multiple output transmissions (mu mimo). Received signal quality measured at mobile wireless devices in a radio sector are communicated to a radio node and used to determine one or more sets of mobile wireless devices to share transmission of control channel elements on the same time and frequency resource element.
Apple Inc.


Split control and payload via cooperative massive mimo (m-mimo) and non-m-mimo infrastructure


Embodiments provide systems and methods for enabling a wireless multi-access communication system having a first frequency band and a second frequency band. The first frequency band can be used to establish a first channel using a non-massive multiple input multiple output (m-mimo) radio access technology (rat).
Broadcom Corporation


Method and transmitting control information in wlan system


A method and apparatus for signal transmission in a wireless local area network (wlan) system. The method according to one embodiment includes generating a first very high throughput (vht) signal, generating a second vht signal, and transmitting the first vht signal and the second vht signal.
Lg Electronics Inc.


Apparatus and channel feedback in multiple input multiple output system


A method and apparatus for a channel feedback by a signal transmitting device in a multiple input multiple output (mimo) system are provided. The method includes transmitting a pilot in which a compression rate is reflected to a signal receiving device; receiving channel related information on a compressed channel from the signal receiving device; and performing a precoding based on the channel related information.
Industry-academic Cooperation Foundation, Yonsei University


Power control for devices having multiple antennas


Power control for devices having multiple transmit antennas are disclosed, including power control methods for physical uplink control channel (pucch) and sounding reference signal (srs) transmissions for a wireless transmit/receive unit (wtru). The pucch and srs power control methods include selecting a multiple input multiple output (mimo) mode and changing the power of the pucch or srs transmission based on the selected mimo mode.
Interdigital Patent Holdings, Inc.


Method for setting modulation and coding scheme in wireless ran system and apparatus supporting the same


A method of transmitting data by a multi-user multiple input multiple output (mu-mimo) transmitter in a wireless local area network system. The method according to one embodiment includes generating a physical layer protocol data unit (ppdu), the ppdu including a bundled interface field, a modulation and coding scheme (mcs) index field and a data field; and transmitting the ppdu to a plurality of receiving stations.
Lg Electronics Inc.


Method for providing information of access point selection


A method of transmitting basic service set (bss) load information. The method according to one embodiment includes establishing, by an access point (ap), an association with at least one very high throughput (vht) station that has successfully synchronized with the ap and that has a capability of receiving at least one spatial stream of a plurality of spatial streams transmitted via a multi user-multiple input multiple output (mu-mimo) transmission; and broadcasting, by the ap, a beacon frame that includes load information including a station count field and an antenna utilization field.
Lg Electronics Inc.


Method and cancelling interference


A method and apparatus for cancelling interference are disclosed. The method for cancelling interference, performed by a user equipment (ue) includes receiving interference transmission layer restriction information about a neighbor base station (bs) transmitting an interference signal or information about the number of antenna ports used in transmitting the interference signal by the neighbor bs, detecting control information about the interference signal using the interference transmission layer restriction information, and removing the interference signal using the detected control information.
Lg Electronics Inc.


Method and a multi-user multiple input multiple output (mu-mimo) network with single transceiver subscriber modules


In a multi-user multiple input multiple output (mu-mimo) wireless network comprising an access point and several subscriber modules, a subscriber module configured with a single transceiver and two antennas elements operates a polarization switch to cause one of the two antenna elements to be connected with the single transceiver. The polarization switch may be operated in response to receiving a command from the access point.
Cambium Networks Limited




Multiple Input Multiple Output topics:
  • Multiple Input Multiple Output
  • Communication System
  • Base Station
  • Access Point
  • Modulation
  • Pilot Signal
  • Scheduling
  • Demodulation
  • Channel Estimation
  • Communications
  • Computer Program
  • Beamforming
  • User Group
  • Channel Status
  • Allocation


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