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Multiple Input Multiple Output patents



      
           
This page is updated frequently with new Multiple Input Multiple Output-related patent applications. Subscribe to the Multiple Input Multiple Output RSS feed to automatically get the update: related Multiple RSS feeds. RSS updates for this page: Multiple Input Multiple Output RSS RSS


Receiver-aided multi-user mimo and coordinated beamforming

Broadcom

Receiver-aided multi-user mimo and coordinated beamforming

Method and apparatus for resource allocation in a mimo communication system

Alcatel Lucent

Method and apparatus for resource allocation in a mimo communication system

Method and apparatus for resource allocation in a mimo communication system

Lg Electronics

Method and apparatus of transmitting a spatial stream for mu - mimo in a wireless local area network system

Date/App# patent app List of recent Multiple Input Multiple Output-related patents
02/19/15
20150049698
 Method for transmitting uplink control information patent thumbnailMethod for transmitting uplink control information
A method for transmitting uplink channel state information (csi) in a coordinated multi-point (comp) system is provided, which includes coding and multiplexing operations. In a multiple input multiple output (mimo) system, a method for transmitting csi of multiple coordinated points according to an embodiment of the present invention includes coding the csi of the multiple coordinated points, modulating the coded csi of the multiple coordinated points, and multiplexing the modulated csi on a physical uplink shared channel (pusch).
Alcatel Lucent
02/12/15
20150043450
 Receiver-aided multi-user mimo and coordinated beamforming patent thumbnailReceiver-aided multi-user mimo and coordinated beamforming
Embodiments include systems and methods for improving the beamforming efficiency of multi-user multiple input multiple output (mu-mimo) and/or coordinate beamforming (cb) in wireless multi-access networks. In one aspect, a receiver-aided approach for mu-mimo and/or cb is provided.
Broadcom Corporation
02/12/15
20150043341
 Method and  resource allocation in a mimo communication system patent thumbnailMethod and resource allocation in a mimo communication system
A method of controlling uplink multiple input multiple output transmission between user equipment and a base station of a wireless communications network, user equipment and a computer program product are disclosed. The method comprises the steps of: identifying whether insufficient capacity exists on a primary uplink stream to carry pending uplink data packets; and if insufficient capacity exists, preventing establishment of a secondary uplink stream when it is determined that pending uplink data packets which would not be carried by the primary uplink stream would under-utilise the secondary uplink stream.
Alcatel Lucent
02/05/15
20150036674
 Method and apparatus of transmitting a spatial stream for mu - mimo in a wireless local area network system patent thumbnailMethod and apparatus of transmitting a spatial stream for mu - mimo in a wireless local area network system
A method of transmitting a spatial stream for multi user (mu)-multiple input multiple output (mimo) in a wireless local area network system and a transmitter for performing the method are provided. The method includes transmitting, to a receiver, a management frame including group information to assign or change a position of a plurality of spatial streams corresponding to each of a plurality of groups, and transmitting, to the receiver, a frame including at least one spatial stream, wherein the group information includes a plurality of group indicators and a plurality of spatial stream (ss) indicators, each of the plurality of group indicators indicating whether the receiver is a member of each of the plurality of groups, each of the plurality of ss indicators indicating a position of the plurality of spatial streams corresponding to each of the plurality of groups..
Lg Electronics Inc.
01/29/15
20150030097
 Method and  subcarrier and antenna selection in mimo-ofdm system patent thumbnailMethod and subcarrier and antenna selection in mimo-ofdm system
A method and apparatus for radio resources control in a multiple input multiple output (mimo) orthogonal frequency division multiplexing (ofdm) communication system are disclosed. Radio resources are controlled by producing and applying a respective adaptive modulation and coding to each data stream.
Interdigital Technology Corporation
01/29/15
20150030093
 Encoding apparatus and encoding  multiple input multiple output communication system patent thumbnailEncoding apparatus and encoding multiple input multiple output communication system
When precoding information corresponding to data items of respective layers to be transmitted is received from an upper layer, an encoding apparatus of a multiple input multiple output (mimo) communication system selects a precoding matrix among a plurality of precoding matrices stored in a storage using the precoding information and precodes the data items of the respective layers by simple operations consisting of at least one operation combination of addition, subtraction, selection, and inversion operations in accordance with a kind of the selected precoding matrix and a precoding operation pattern.. .
Electronics And Telecommunications Research Institute
01/29/15
20150029986
 Mu-mimo transmission method in wireless lan system patent thumbnailMu-mimo transmission method in wireless lan system
A multi-user-multiple input multiple output (mu-mimo) transmission method performed by an access point (ap) in a wireless local area network (wlan) system is provided. The method includes transmitting an mu-mimo initiation message to a destination station (sta) which is a target of a mu-mimo transmission, the mu-mimo initiation message informing that mu-mimo transmission will be initiated, receiving a sounding frame transmitted by the destination sta as a response to the mu-mimo initiation message and performing mu-mimo transmission on data by beamforming based on channel information obtained from the sounding frame.
Lg Electronics Inc.
01/22/15
20150023248
 Multi-user multiple input multiple output (mimo) communication with distributed antenna systems in wireless networks patent thumbnailMulti-user multiple input multiple output (mimo) communication with distributed antenna systems in wireless networks
A system and a method are provided. The method includes deploying a plurality of antennas of an access point or a base station as a distributed antenna system.
Nec Laboratories America, Inc.
01/22/15
20150023187
 Wireless local area network system and  operating the same patent thumbnailWireless local area network system and operating the same
A method of operating a wireless local area network (wlan) system is provided. The wlan includes an access point supporting uplink multiple user multiple input multiple output mode.
Samsung Electronics Co., Ltd.
01/08/15
20150010104
 Transmitter and signal transmitting method thereof patent thumbnailTransmitter and signal transmitting method thereof
A signal transmitter and receiver are provided. The transmitter includes: a multiple input multiple output (mimo) precoder configured to, in response to a first input signal and a second input signal, generate a first transmission signal and a second transmission signal by performing mimo precoding by pre-phase shifting or pre-phase shifting/hopping the second input signal, and superposition encoding the first input signal and the pre-phase shifted or pre-phase shifted/hopped second input signal; and an orthogonal frequency division multiplexing (ofdm) modulator configured to ofdm modulate the first transmission signal and the second transmission signal..
Samsung Electronics Co., Ltd.
01/01/15
20150003374

Coexistent channel access method


A method for transmitting a multiple input multiple output (mimo) packet in a wireless local area network is described. The method includes generating a physical layer protocol data unit (ppdu) including a short training field (stf), a long training field (ltf), a very high throughput (vht)-signal field, a vht-stf, a vht-ltf and a plurality of data streams.
Lg Electronics Inc.
01/01/15
20150003350

Downlink transmission in a mu-mimo system


A method is provided for managing a downlink transmission in a multi user-multiple input multiple output (mu-mimo) system. The mu-mimo system includes a base station and a set of remote radio units connected to the base station.
Orange
01/01/15
20150003325

Progressive channel state information


Embodiments of system, device, and method configurations for implementing a progressive channel state indicator (csi) evaluation are disclosed herein. In one example, techniques for increasing the precision of channel feedback information by detecting a best beam index in a progressively scanning grid of beams is deployed in a long term evolution (lte) network.
01/01/15
20150003239

Method and response scheduling in a downlink multiple-user multiple input multiple output network


Embodiment and methods and apparatus for scheduling one or more responses for multiple stations (stas) in a downlink multiple-user multiple-input-multiple-output (mimo) network transmission are provided.. .
12/25/14
20140376601

Adaptive 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.
12/25/14
20140376503

Control channel transmitting method, base station and terminal


A method used in a communication system including a base station and a terminal, the method includes: transmitting from the base station to the terminal a control channel with use of a control channel format selected from among a plurality of control channel formats, each including modulation scheme information, according to whether multiple input multiple output (mimo) transmission is applied or not, and receiving the control channel by the terminal, wherein a number of bits indicating a modulation scheme included in a control channel format to be selected when the mimo transmission is applied is greater than that included in a control channel format to be selected when the mimo transmission is not applied.. .
Fujitsu Limited
12/18/14
20140370905

Ue capability report method and apparatus in mobile communication system


A method and an apparatus for reporting a capability of a user equipment (ue) supporting advanced functions such as carrier aggregation (ca) are provided. The method includes checking, when a control message requesting a capability report is received, a radio access technology (rat) type and transmitting, when the rat type is set to evolved universal terrestrial radio access (eutra), at least one band combination information on at least one band combination supported by the terminal.
Samsung Electronics Co., Ltd.
12/11/14
20140362834

Scheduling information transmission method, device, and communications system


A scheduling information transmission method, device, and communications system are provided. The method includes: generating a channel attribute parameter and a serving grant (sg), where the channel attribute parameter and the sg are used for data scheduling of uplink multiple input multiple output (mimo); and delivering the channel attribute parameter and the sg to a user equipment (ue) through a target channel, where the channel attribute parameter is used by the ue to determine a primary-stream enhanced dedicated channel transport format combination indicator (e-tfci) and a secondary-stream e-tfci.
11/27/14
20140348260

Method to implement a multiple input multiple output transmission mode


A method to implement a multiple input multiple output transmission mode in the method of the invention, said mimo transmission mode comprises using a certain number of antennas in a user equipment and a given number of antennas in a radio access node for the communication between said user equipment and said radio access node, said communication carried out by means of a communication channel, said communication channel represented by a channel matrix. The method of the invention is characterised in that it comprises uncorrelating at least part of the coefficients of said channel matrix when said communication channel is degenerate by making use of at least one additional antenna in each of said radio access node and said user equipment in order to change the radiation pattern associated to transmission layers of said communication enabling the use of an enhanced mimo transmission mode..
11/27/14
20140348097

Method for performing channel sounding in wireless lan system and supporting same


The present invention relates to a method of performing channel sounding in a wireless lan system. The method includes transmitting a null data packet announcement (ndpa) frame for providing notice of an ndp to be transmitted, and transmitting the ndp and receiving a feedback frame from a station (sta).
11/27/14
20140347240

Mimo antenna arrays built on metamaterial substrates


A magnetic permeability enhanced metamaterial is used to enhance the antenna array of a multiple input multiple output (mimo) communication system. A rectangular patch antenna array is formed including a stack of a plurality of unit cells, where each unit cell includes an inductive loop of magnetic permeability enhanced metamaterials embedded in a host dielectric substrate.
11/20/14
20140341320

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.
11/20/14
20140341314

Implementing multi user multiple input multiple output (mu mimo) base station using single-user (su) mimo co-located base stations


A system that implements multi user multiple inputs multiple outputs (mu mimo) base station using a plurality of co-located single-user (su) mimo base stations is provided herein. The system may include a number n co-located single-user multiple input multiple output (su-mimo) bases stations each having a number k mimo rank, wherein said n co-located su-mimo base stations are configured to share a common antennas array, operating over a common frequency band; a front-end mimo processor connected to said n co-located su-mimo base stations and further coupleable to said common antennas array; and a back-end coordinator configured to collaboratively assist in optimizing operation of said n co-located su-mimo base stations, such that said n co-located su-mimo base stations and said front-end mimo processor collaboratively implement a multi-user multiple input multiple output (mu-mimo) base station capable of dynamically separating a coverage area into n*k spatial channels..
11/13/14
20140334565

Method and miniaturization of mimo systems via tightly coupled antenna array


In a multiple input multiple output (mimo) system, an apparatus and method includes a tightly coupled array antennas (tca) or current sheet antennas (csa). Far-field radiation patterns from any current sheet antenna are formed from the combination of the fields generated by a set of currents on the csa of array port orthogonal modes, such as the characteristic modes (cm).
11/13/14
20140334460

Method and transmitting reference signals in uplink multiple input multiple output (mimo) transmission


The present invention relates to a wireless communication system, and more particularly, to a method and an apparatus for transmitting reference signals in uplink mimo transmission. According to one embodiment of the present invention, the method for transmitting uplink signals through a terminal in the wireless communication system comprises the steps of: receiving control information including the information on a cyclic shift and/or an orthogonal cover code; allocating the multiplexed reference signals onto an uplink subframe; and transmitting the subframe through a multi-antenna.
11/13/14
20140334413

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 includes transmitting by the mu-mimo transmitter, a physical layer convergence procedure (plcp) 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, by the mu-mimo transmitter, the ppdu to a receiving station.
10/30/14
20140321568

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


Methods and apparatuses are provided for transmitting control information to a terminal, by a base station, in a multiple input multiple output (mimo) mobile communication system. The control information is generated including a field indicating either a precoding scheme or a pilot format according to a type of pilot used for data demodulation in the terminal.
10/23/14
20140317241

Utility-maximization framework for dynamic adaptive video streaming over hypertext transfer protocol in multiuser-multiple input multiple output long-term evolution networks


A method for scheduling user equipment (ue) devices comprising sorting the plurality of ue devices based on a weight of priority associated with each of the ue devices with respect to a plurality of subbands, and assigning one or more of the ue devices to each of the subbands using the weight of priority associated with the ue devices, wherein the weight of priority is based on one or more network utility functions associated with the ue devices. A computer program product comprising computer executable instructions to receive a media content segment using a dynamic adaptive video streaming over hypertext transfer protocol (http) (dash) protocol, monitor a playback buffer size of a ue device, monitor a battery energy level of the ue device, and adjust a representation quality level in a segment request based on the target requested video rate, the playback buffer size and the battery energy level..
10/23/14
20140314166

Adaptive signaling and feedback for multi-user multiple input multiple output (mu-mimo)


Embodiments recognize that multi-user multiple input multiple output (mu-mimo) performance can be greatly enhanced if additional parameters are provided to the user equipment (ue) during link adaptation and/or data demodulation. Recognizing the overhead that such signaling entails, embodiments provide mu-mimo enhancement solutions that identify and signal only those parameters that can result in a large gain improvement when known at the ue.
10/16/14
20140307819

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.
10/16/14
20140307818

Base station configuration using massive multiple input multiple output (m-mimo)


Systems and methods for configuring base stations in a geographic region to handle specific respective types of data traffics are provided. The configuration of the base stations can be static, semi-static, or dynamic.
10/16/14
20140307702

Massive mimo (m-mimo) support for heterogeneous networks (hetnets)


Systems and methods for enabling a wireless backhaul network between access points (aps) in a wireless network are provided. In an embodiment, the wireless backhaul network is enabled using a massive multiple input multiple output (mimo) radio access technology (rat).
10/09/14
20140301383

Method and apapratus for transmitting a frame in a wireless lan system


The present invention relates to a method and apparatus for transmitting a frame in a wireless lan system. An access point (ap) receives a single orthogonal frequency division multiplexing (ofdm) symbol from each of a plurality of stations (sta) and a single-tone request to send (srts) frame through a single subcarrier, selects stas for performing uplink (ul) multiuser (mu)-multiple input multiple output (mimo) transmission, and transmits to the plurality of stas a single-tone clear to send (scts) frame allocated to the same subcarrier as a subcarrier to which the srts frames received from the selected stas are allocated..
10/02/14
20140292593

Multiband mimo antenna assemblies operable with lte frequencies


According to various aspects, exemplary embodiments are disclosed herein of multiple input multiple output (mimo) antenna assemblies operable over multiple frequency bands, including lte (long term evolution) frequencies (e.g., 4g, 3g, other lte generation, b17 (lte), lte (700 mhz), etc.). In various embodiments, an antenna assembly generally includes a first or primary cellular antenna and a second or secondary cellular antenna.
09/25/14
20140286648

Optical mimo processing


A technique is provided for an optical multiple input multiple output (mimo) processing system. The optical (mimo) processing system includes an interface to a multi-mode fiber at a first end of the optical processing system; m first single-mode waveguides coupled to the interface; wherein the first waveguides are arranged to carry m first optical signals, respectively; n second single-mode waveguides at a second end of the optical processing system, wherein the second waveguides are arranged to carry n second optical signals, respectively, wherein the n second optical signals are associated with n modes carried by the multi-mode fiber; and an optical processing core arranged to transform the first optical signals into the second optical signals such that a correlation between the second optical signals is decreased compared to a correlation between the first optical signals using a plurality of optical couplers for coupling each of the m first optical signals with one another, such that each of the n second optical signals is a linear combination of all of the m first optical signals..
09/25/14
20140286327

Method for transmitting control information and the same


Methods and devices for transmitting or receiving data in a wireless local area network are provided. The method in one embodiment includes transmitting, by a transmitter, a first long training field (ltf) to a receiver; transmitting, by the transmitter, a very high throughput (vht)-sig-a field to the receiver; transmitting, by a transmitter, a second ltf for multiple input multiple output (mimo) channel estimation to the receiver; transmitting, by the transmitter, a vht-sig-b field to the receiver; and transmitting, by the transmitter, a data field to the receiver, wherein the first ltf, the vht-sig-a field, the second ltf, the vht-sig-b field and the data field are sequentially transmitted, and wherein the second ltf and the data field are mapped to at least one spatial stream based on a mapping matrix but the first ltf and the vht sig-a field are not mapped to the at least one spatial stream..
09/25/14
20140286184

Method and transmitting reference signal for reducing intercell interference in multiple input multiple output communication system


According to one embodiment, a method for receiving a channel state information-reference signal (csi-rs) for measuring a channel includes: receiving csi-rss on resource elements (res) in a subframe configured for the csi-rss from a base station, wherein if each csi-rs of the received csi-rss is transmitted from each of four or more transmit antenna ports of the base station, at least two res on which each csi-rs is received are associated with each of the four or more transmit antenna ports; and transmitting channel state information based on the received csi-rss.. .
09/18/14
20140269617

Method for modifying multiple input multiple output mode across radio network controllers


A method for modifying multiple input multiple output (mimo) mode across radio network controllers (rncs) is provided by the present disclosure. In the method of the present disclosure, a serving rnc (srnc) transmits a request message to a drift rnc (drnc), wherein the request message requests the drnc to set a radio link for a mobile equipment in a cell controlled by the drnc, and the drnc feeds back a response message to the srnc based on the capability of the drnc and the cell controlled by the drnc, wherein the response message contains the element used for configuring the radio link in the non-mimo mode.
09/18/14
20140266868

Methods and systems for multiple input multiple output synthetic aperture radar ground moving target indicator


A multiple-input multiple-output (mimo) synthetic aperture radar (sar) system. The radar system includes spatially offset transmitting antennas simultaneously transmitting at least two distinguishable waveform signals and receiving antennas receiving incoming waveform returns for each of the distinguishable waveform signals.
09/11/14
20140254713

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.
09/11/14
20140254514

Codebook enchancement for long term evolution (lte)


multiple input multiple output systems using a transmit precoder codebook designed for a four-transmitter (4tx) antenna configuration are described. The 4tx antenna configuration is an attractive option for base stations in cellular network environments and it is desirable to use a transmitter precoder codebook that provides sufficient granularity in typical operating scenarios, and to address various antenna configurations.
09/04/14
20140247812

Mimo communication method, transmitting device, and receiving device


A multiple input multiple output (mimo) communication method and system for performing communication between n (n is an integer greater than or equal to 2) transmitting devices each having a transmit antenna and at least one receiving device having n receive antennas by using a multi-user mimo scheme. The method includes dividing the n transmitting devices into a plurality of sets, and assigning an orthogonal code to each set of transmitting devices as a digital signal sequence to be transmitted by each of the transmitting devices, and arranging the digital signal sequences to be transmitted by the transmitting devices in a frequency axis direction in which an inverse fast fourier transform is performed, and performing coding..
08/28/14
20140241451

Method for transmitting control information and the same


Methods and devices for transmitting or receiving data in a wireless local area network are provided. The method in one embodiment includes transmitting, by a transmitter, a first long training field (ltf) to a receiver; transmitting, by the transmitter, a very high throughput (vht)-sig-a field to the receiver; transmitting, by the transmitter, a second ltf for multiple input multiple output (mimo) channel estimation to the receiver; transmitting, by the transmitter, a vht-sig-b field to the receiver; and transmitting, by the transmitter, a data field to the receiver, wherein the first ltf, the vht-sig-a field, the second ltf, the vht-sig-b field and the data field are sequentially transmitted, and wherein the second ltf and the data field are mapped to at least one spatial stream based on a mapping matrix but the first ltf and the vht sig-a field are not mapped to the at least one spatial stream..
08/28/14
20140241211

Mimo-ofdm system for robust and efficient neuromorphic inter-device communication


A multiple input multiple output (mimo) orthogonal frequency division multiplexing (ofdm) system for inter-device communication is described. Information data from each neuromorphic chip is coded and modulated, on the basis of destination, into different channels.
08/28/14
20140241192

Method and exchanging information between base station and terminal


A method and apparatus of exchanging information on the number of layers which is supported commonly between the base station and the terminals in multi-user multiple input multiple output (mu-mimo) environment is provided for performance enhancement. The communication method of a terminal in a wireless communication system according to the present disclosure includes receiving a reference signal and information on a number of layers supportable simultaneously from a base station, measuring a channel state value based on the reference signal and the number of layers, determining whether the measured channel state value fulfills a minimum required channel state value, and transmitting, when the measured channel state value fulfills the minimum required channel state value, a value determined based on the measured channel state value to the base station..
08/28/14
20140240178

Portable terminal with antenna device for display element or display assembly including flexible functional region


A portable terminal is provided. The portable terminal includes a flexible display element, a first antenna element disposed at a first region on the display element, a second antenna element disposed at a foldable second region on the display element to face the first region, and a switch element configured to selectively connect the second antenna element.
08/21/14
20140233414

Mu-mimo-ofdma methods and systems for signaling multi-rank cqis and precoders


A method for determining attributes of communication channels of multi-user (mu)-multiple input multiple output (mimo) users in an orthogonal frequency division multiplexing based multiple access (ofdma) system is disclosed. The method comprises receiving from a base station, for at least one sub-band of contiguous sub-carriers, an indication of an estimate of or an upper-bound on a total number of streams that are co-scheduled by the base station on the at least one sub-band or an indication of a fraction of a transmit power at the base station that is applied to streams that are scheduled for transmission to a particular user, determining one or more signal quality measures for the at least one sub-band based on at least one of the fraction or the estimate of or the upper-bound on the total number of streams that are scheduled by the base station on the at least one sub-band, and transmitting to the base station an indication of the one or more signal quality measures.
08/14/14
20140228028

Multiple input multiple output (mimo) based concurrent scan of neighbor cells


Methods, systems, and devices are described for concurrently performing handoff-related measurements for neighbor cells using multiple input multiple output (mimo) antenna resources. In one example, a mobile device is in communication with a serving cell.
08/14/14
20140226745

Multi-user multiple input multiple output wireless communications


A method implemented in a user equipment used in a multi-user multiple input multiple output (mu-mimo) wireless communications system is disclosed. The method includes receiving from a base station an indication of a first modulation type for the user equipment, receiving a first data signal for the user equipment, receiving a second data signal for a co-scheduled user equipment, where a second modulation type for the co-scheduled user equipment is unknown to the user equipment, and deciding the second modulation type.
08/14/14
20140226744

Communication channel optimization systems and methods in multi-user communication systems


Systems and methods of optimizing communication channels in multi-user communication systems are provided. Coding weights are determined based on communication channel state information for communication channels between a transmitter and multiple receivers.
08/14/14
20140226743

Optimum interleaver design for a communication system


In a method for determining interleaver parameters for a multiple input multiple output (mimo) communication system, maximum average distance for a plurality of adjacent spatial streams for a plurality of system configurations is determined. An interleaver parameter set for the plurality of system configurations is determined based on the determined maximum average distance..
08/14/14
20140226741

Implementing multi user multiple input multiple output (mu mimo) base station using single-user (su) mimo co-located base stations


A system that implements multi user multiple inputs multiple outputs (mu mimo) base station using a plurality of co-located single-user (su) mimo base stations is provided herein. The system may include a number n co-located single-user multiple input multiple output (su-mimo) bases stations each having a number k mimo rank, wherein said n co-located su-mimo base stations are configured to share a common antennas array, operating over a common frequency band ; a front-end mimo processor connected to said n co-located su-mimo base stations and further coupleable to said common antennas array; and a back-end coordinator configured to collaboratively assist in optimizing operation of said n co-located su-mimo base stations, such that said n co-located su-mimo base stations and said front-end mimo processor collaboratively implement a multi-user multiple input multiple output (mu-mimo) base station capable of dynamically separating a coverage area into n*k spatial channels..
08/14/14
20140226598

Control channel transmitting method, base station and terminal


A communication system, that includes a base station and a terminal, whereby the base station includes, a transmitting unit that transmits a control channel to the terminal with use of a control channel format selected from among a plurality of control channel formats, each including modulation scheme information, according to whether multiple input multiple output (mimo) transmission is applied or not, and wherein the terminal includes, a receiving unit that receives the control channel transmitted from the base station, wherein a number of bits indicating a modulation scheme included in a control channel format to be selected when the mimo transmission is applied is greater than that included in a control channel format to be selected when the mimo transmission is not applied.. .
08/07/14
20140219404

Implementing blind tuning in hybrid mimo rf beamforming systems


A system and a method for applying a blind tuning process to m antennas coupled via n beamformers to a multiple input multiple output (mimo) receiving system having n channels, wherein m>n, are provided herein. The method includes the following steps: periodically measuring channel fading rate at a baseband level to determine the number of antennas l out of k antennas connected to each one of the beamformers, to be combined at each one of the n beamformers; assigning the antennas to the subset l according to some criteria such as best quality indicator; repeatedly applying a tuning process to l antennas in each one of the n beamformers..
08/07/14
20140219263

Method for providing information of access point selection


A method for providing information of access point (ap) selection in a wireless local area network (wlan) system, the method including receiving from candidate aps the ap selection information including channel correlation information for other stations associated with the candidate aps; and selecting one ap from candidate aps according to the channel correlation information corresponding to the candidate aps. Accordingly, a gain of multi-user multiple input multiple output (mimo) can be increased, and an ap suitable for a terminal can be selected..
08/07/14
20140219213

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..
07/31/14
20140211873

Method and reporting downlink channel state


A method of reporting a channel state to a base station supporting downlink multiple input multiple output (mimo) in a wireless communication system includes measuring a downlink channel based on a downlink signal received from the base station, and reporting a codebook index for precoding of the downlink signal according to the measurement of the downlink channel. In the case in which the ue receives channel state information (csi)-reference signal (rs) resources for n1 antenna ports, if a report for n2 (n1>n2) antenna ports is set, a codebook for the n2 antenna ports is configured as a subset of a codebook for the n1 antenna ports configured by the base station.
07/31/14
20140211707

Method and device for allocating group identifier


Embodiments of the present invention discloses a method and a device for allocating a group identifier, which can allocate a non-conflict gid to a non-ap sta in an area covered by multiple bss networks, so that the problem of gid conflict which is occurred when allocating the gid for the non-ap sta can be reduced. A method provided by the embodiment of the present invention includes: dividing all group identifiers (gids) into n parts according to number of the gids, and respectively allocating the n parts to n basic service set (bss) networks, which communicate in a multi user-multiple input multiple output (mu-mimo) mode, where the n bss networks have a common area, n is a natural number which is bigger than 1..
07/24/14
20140204855

Method of transmitting feedback message in wireless communication system


A method of transmitting a feedback message in wireless communication system is provided. The method includes selecting n best subbands of m subbands according to cqi, where both m and n are a natural number and m is larger than n, generating multiple input multiple output (mimo) information comprising n codebook indexes and n differential cqis and transmitting the feedback message comprising the mimo information..
07/24/14
20140204785

Communication apparatus and using massive multiple input multiple output


A communication apparatus and method using a massive multiple input multiple output (mimo) is disclosed, the method including measuring a transmission capacity between terminals disposed in a cell and a base station when a number of terminals disposed in the cell of the base station is greater than a number of terminals to be supported by the base station, and selecting at least one terminal for maximizing a network capacity from among terminals disposed in the cell based on the transmission capacity and the number of terminals to be supported by the base station.. .
07/17/14
20140198866

Wireless communication device


A wireless communication device communicates with, using a plurality of antennas, a communication partner device including a plurality of antennas. The wireless communication device includes a communication unit, an interference intensity judgment unit, and a determination unit.
07/17/14
20140198832

Multiple input multiple output antenna module and associated method


A multiple input multiple output (mimo) antenna module, comprising a first signal feed port coupled to a first antenna element disposed along a first edge of a pcb, a second signal feed port coupled to a second antenna element disposed on the pcb and a transceiver operable to be selectively coupled to either or both of the first and second signal feed ports. The first and second antenna elements form a plurality of antenna elements confined to a peripheral section surrounding a central region of the pcb of the mimo antenna module..
07/10/14
20140192918

Method and reporting downlink channel state


A method of reporting a channel state to a base station supporting downlink multiple input multiple output in a wireless communication system includes measuring a downlink channel based on a downlink signal received from the base station, and reporting a codebook index for precoding of the downlink signal according to the measurement of the downlink channel. The codebook for precoding includes an improved codebook (hereinafter, referred to as an improved 4tx codebook) having a dual structure composed of a codebook for wideband and a codebook for subband, for 4 transmit (4tx) antenna ports, and the improved 4tx codebook includes sub-codebooks obtained by sub-sampling the codebook for subband according to priority..
06/26/14
20140177545

Time multiplexed channel state information reporting in a multi antenna wireless communication system


The embodiments herein relates to a method in a user equipment (305) for enabling a base station (301) to schedule the user equipment (305) in a wireless communication system (300). The wireless communication system (300) is in multiple input multiple output, mimo, mode and comprises four transmit antennas.
06/19/14
20140169491

Techniques to manage processing of multiple input multiple output communications


An apparatus may include a channel estimation component to determine a channel estimation matrix h for a tone of a multiplicity of tones in a multiple input multiple output (mimo) communications signal. The apparatus may further include a processor circuit coupled to the receiver component, and a flow selection component for execution on the processor circuit to calculate a figure of merit for power loss for the received tone based upon the channel estimation matrix, and based upon the calculated figure of merit, perform either a max-log calculation or a maximum likelihood calculation to determine a received signal metric, but not both calculations.
06/12/14
20140162670

Codebook for eight transmit antennas and multiple input multiple output communication system using the codebook


A transmitter and a receiver of a multiple input multiple output (mimo) communication system may use two codebooks to share channel information. When the transmitter uses eight transmit antennas, two codebooks may be defined.
06/12/14
20140161157

Interference and noise estimation in a multiple input multiple output (mimo) receiver


A receiver circuit receives a signal including a first reference signal from a first antenna port that is allocated to the ue. The receiver circuit includes a descrambling and despreading unit that despreads and descrambles the signal using a spreading code of the first antenna port and a scrambling sequence assigned to the ue to generate a first antenna port signal.
06/12/14
20140161109

Scheduler and scheduling transmitting data in mimo based wireless lan system


A scheduler and scheduling method that may select a data transmission time interval and a data transmitting station are included in a multi-user multiple input multiple output (mimo) communication system. An access point may include a receiver to receive channel measurement signals from stations using a plurality of receive antennas; a channel estimation unit to generate channel state matrices with respect to wireless channels formed from the stations to the receive antennas using the channel measurement signals; and a scheduler to select at least one transmitting station from the stations by considering the channel state matrices and a number of the receive antennas.
06/12/14
20140161053

Control channel in a high-speed packet access system


The proposed technology relates to a method for conveying information from a node to user equipment, ue, in a hspa, system. The method comprises the step of obtaining (s1) rank information and modulation information related to a four-branch multiple input multiple output, mimo, system.


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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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