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Multiple Input Multiple Output patents



      

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




Date/App# patent app List of recent Multiple Input Multiple Output-related patents
02/04/16
20160036611 
 Scattered pilot pattern and channel estimation  mimo-ofdm systems patent thumbnailScattered 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


02/04/16
20160036503 
 Method and  operating a power save mode in a wireless lan system patent thumbnailMethod 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.


02/04/16
20160036501 
 Multiple input multiple output (mimo) communication  chip to chip and intrachip communication patent thumbnailMultiple 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


02/04/16
20160033632 
 Mimo antenna with elevation detection patent thumbnailMimo 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.


01/14/16
20160014733 
 Method of reference signaling resource allocation for control channel transmission in wireless communication system patent thumbnailMethod 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.


01/14/16
20160014732 
 Method of reference signaling resource allocation for control channel transmission in wireless communication system patent thumbnailMethod 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.


01/14/16
20160013849 
 User equipment and base station patent thumbnailUser 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.


12/31/15
20150382314 
 A network node, a core network node, and methods therein patent thumbnailA 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)


12/31/15
20150381292 
 Method and system for ue measurements in support of mimo ota patent thumbnailMethod 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.


12/31/15
20150381245 
 Method of enhancing system performance and related wireless module patent thumbnailMethod 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


12/31/15
20150381243 

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.


12/24/15
20150373625 

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.


12/24/15
20150372842 

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


12/24/15
20150372793 

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.


12/24/15
20150369851 

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


12/17/15
20150365938 

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


12/17/15
20150365143 

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.


12/17/15
20150365142 

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.


12/10/15
20150358130 

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.


12/10/15
20150358105 

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.


12/03/15
20150349897 

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.


11/26/15
20150341955 

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


11/19/15
20150333845 

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


11/19/15
20150333392 

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.


11/12/15
20150327277 

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)


11/05/15
20150319739 

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.


11/05/15
20150318906 

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.


10/22/15
20150304007 

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.


10/08/15
20150288434 

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.

10/01/15
20150280799 

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.


09/24/15
20150271762 

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


09/24/15
20150270872 

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


09/17/15
20150264560 

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)


09/17/15
20150263796 

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.


09/10/15
20150256244 

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


09/10/15
20150253420 

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.


09/10/15
20150253419 

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.


09/03/15
20150249490 

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)


08/27/15
20150245368 

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.


08/27/15
20150244433 

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


08/20/15
20150237613 

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.


08/20/15
20150236765 

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


08/13/15
20150230190 

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.


08/06/15
20150223223 

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.


07/30/15
20150215862 

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.


07/30/15
20150215017 

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.


07/30/15
20150215013 

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


07/09/15
20150195825 

Control channel transmitting method, base station and terminal


A method used by a terminal in a wireless communication system, the method includes: receiving a control channel transmitted from a base station 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 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


07/02/15
20150188733 

Method for removing signal interference based on multiple input multiple output


Disclosed is a method for removing signal interference in a mimo-based interference removing apparatus including transmitting a reference signal to at least one receiver; if channel information is estimated by the receiver, receiving the estimated channel information from the receiver as a feedback signal; and producing transmission pre-coding matrix, beam forming matrix, and weighted matrix using the received channel information. Further, the method includes transmitting information containing the transmission pre-coding matrix, the beam forming matrix, and the weighted matrix by including them in a pilot signal to the receiver, and the mimo-based interference removing apparatus comprises at least one transmitter..
Electronics And Telecommunications Research Institute


07/02/15
20150188686 

Method of performing link adaptation procedure


A method of communicating in a wireless local area network is described. An access point transmits a first physical layer protocol data unit (ppdu) via multi-user multiple input multiple output (mu mimo) transmission to a plurality of stations.
Lg Electronics Inc.


06/25/15
20150181363 

Point-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.


06/25/15
20150180684 

Csi-rs antenna ports extension and 3d codebook design


A system and a method is disclosed for selecting at least one vertical precoding vector of a three-dimensional multiple input multiple output (3d-mimo) configuration based on channel state information-reference signal (csi-rs) information that is feedback from a wireless terminal device to an evolved node b (enb). The 3d-mimo csi-rs process is configured for a plurality of csi-rs ports in which the plurality of csi-rs ports that are grouped into a plurality of csi-rs port groups and in which corresponds to the 3d arrangement of antennas.

06/25/15
20150180561 

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


05/28/15
20150146812 

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.


05/28/15
20150146676 

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


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


05/28/15
20150146654 

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


A method for selecting members of a client uplink group is described. An uplink traffic characteristic information signal is received from each of a plurality of communication devices.
Marvell World Trade Ltd.


05/28/15
20150146652 

System and a scale-invariant symbol demodulator


It is possible to improve the spectral efficiency of multi-layer multiple input multiple output (mimo) transmissions by estimating the magnitude parameter at the receiver side, rather signaling the magnitude parameter from the transmitter to the receiver. In long term evolution (lte) networks, the user equipment (ue) may estimate the power allocation (pa) parameter by executing a series of steps.
Futurewei Technologies, Inc.


05/28/15
20150146512 

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.


05/21/15
20150139046 

Transmitter and receiver calibration for obtaining the channel reciprocity for time division duplex mimo systems


A communication device operating in time division duplex (tdd) mode using multiple antennas is provided herein. The communication device uses receive channel estimation measurements to perform transmit beamforming and multiple input multiple output (mimo) transmission, based on self-calibration of the various up/down paths via a method of transmission and reception between its own antennas, thus achieving reciprocity mapping between up and down links.
Magnolia Broadband Inc.


05/14/15
20150131629 

Methods and system for scheduling a virtual mimo communication environment


A system and method for scheduling cooperative uplink transmissions in a virtual multiple input multiple output (mimo) wireless communication environment are provided. More specifically, both random and channel aware orthogonal scheduling techniques for identifying a sub-set of n mobile terminals to provide cooperative uplink transmissions for each transmit time interval are provided..

05/07/15
20150124911 

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) and orthogonal frequency division multiplexing (ofdm) communication systems. In accordance with one or more embodiments and aspects thereof, a channel estimation system is disclosed that regenerates a representation of the original transmitted signal from the received digital bitstream and selectively applies it to refine and improve channel estimation and signal equalization calculations using the data symbols contained within received frames.
Ixia


05/07/15
20150124901 

Channel quality indicator apparatus and method


A method and apparatus are provided for a wireless communication system including a base station and at least one user equipment. A channel quality indicator (cqi) table can be generated so that only an index corresponding to the measured cqi needs to be fed back to the base station.
Microsoft Corporation


05/07/15
20150124693 

Radio repeater apparatus and system, and operating method thereof


A radio repeater system may include: a multiple input multiple output (mimo) donor antenna configured to transmit/receive mimo signals to/from base stations; a beamforming control unit configured to control beamforming by adaptively applying a phase weight to the repeated signals received from the mimo donor antenna; an interference signal cancellation unit configured to estimate and analyze feedback interference signals introduced from a mimo service antenna to the mimo donor antenna and adaptively cancel the feedback interference signals; and the mimo service antenna configured to transmit/receive mimo signals to/from radio terminals in a service area.. .
Airpoint Co., Ltd.


04/30/15
20150117563 

Method for transmitting channel quality information in a multiple input multiple output system


A method for transmitting channel quality information (cqi) in a mimo system is provided that allows a receiver to feed back a cqi value to a transmitter. The method includes receiving a transmission (tx) pilot signal for each tx antenna from a base station (bs), measuring a first cqi value of a first codeword and a second cqi value of a second codeword based on the pilot signal, and transmitting the first cqi value of the first codeword and the second cqi value of the second codeword to the bs where at least the first or second cqi value includes specific information capable of indicating a transmission restriction status of a corresponding codeword..
Lg Electronics Inc.


04/30/15
20150117372 

Assignment of radio resources to be used on downlink transmissions in a multiple input multiple output (mimo) communication system


An access point and method are described herein for receiving a report from the mobile station containing at least one of a channel quality and a signal strength for each of one or more streams associated with each of one or more transmission modes used during a period of time to send payload to the mobile station, and analyzing the received report to determine one or more downlink control parameters to be used for sending additional payload to the mobile station. In addition, a mobile station and method are described herein for detecting one or more modes of transmissions used by the access point during a period of time to send payload to the mobile station, generating a report containing at least one of a channel quality and a signal strength for each of one or more streams associated with each of the detected one or more transmission modes used by the access point to send the payload to the mobile station, and transmitting the report to the access point..
Telefonaktiebolaget L M Ericsson (publ)


04/30/15
20150117371 

Assignment of radio resources to be used on uplink transmissions in a multi-user multiple input multiple output (mu-mimo) communication system


An access point and method are described herein for interacting with a mobile station and assigning radio resources (e.g., multiple usfs, multiple tscs, multiple mcss, multiple pc levels) at least a portion of which are to be used for upcoming uplink transmissions by the mobile station to the access point. In addition, a mobile station and method are described for interacting with an access point and receiving therefrom assigned radio resources (e.g., multiple usfs, multiple tscs, multiple mcss, multiple pc levels) at least a portion of which are to be used for upcoming uplink transmissions to the access point..
Telefonaktiebolaget L M Ericsson (publ)


04/23/15
20150110210 

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


04/16/15
20150103934 

Method and communication in millimeter wave mimo communication environment


A method and apparatus for communication in millimeter wave multiple input multiple output (mimo) communication are provided. A beamforming matrix by groups for terminals that are classified into a group is generated, and a pilot signal that is beam-formed based on the generated beamforming matrix by groups is transmitted to the terminals.
Electronics And Telecommunications Research Institute


04/16/15
20150103654 

Method and transmitting management information in wireless local area network system


A method for transmitting load information in a wireless local area network. The method according to one embodiment includes generating, by an access point (ap), basic service set (bss) load information, the bss load information including a multiple input multiple output (mimo) channel underutilization field; and transmitting, by the ap, the bss load information.
Lg Electronics Inc.


04/02/15
20150092895 

Adaptation techniques in mimo


A method of the multiple input multiple output feedback is disclosed. In accordance with an embodiment of the invention, the multiple input multiple output feedback method includes a receiver receiving a reference signal from a base station and calculating a signal to interference and noise ratio from the received reference signal.
Intel Mobile Communications Gmbh


04/02/15
20150092876 

Method and amplifying multiple input multiple output (mimo) in wireless communication system


A method and apparatus for amplifying a mimo signal in a wireless communication system are disclosed. A signal amplifier for amplifying a mimo signal in a wireless communication system includes: a recognition module for recognizing network information and antenna information of a source device; and an adaptive link construction module for forming a link between a plurality of antenna with respect to the source device and a plurality of antenna with respect to the destination device on the basis of the recognized information..
Lg Electronics Inc.


04/02/15
20150092621 

Full duplex system in massive mimo


A multiple input multiple output (mimo) antenna system is implemented for communications in a wireless device. Mimo beamforming techniques are utilized to improve communications, and may be utilized in full-duplex mode.
Broadcom Corporation


03/26/15
20150085947 

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.


03/26/15
20150085944 

Methods of antenna system control in massive mimo systems


A multiple input multiple output (mimo) antenna system is implemented for communications in a wireless device. Information regarding the environment surrounding the wireless device may be used to determine which of the mimo antennas are selected such that communications performance is improved.
Broadcom Corporation


03/26/15
20150085820 

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


03/26/15
20150085807 

Communication method and system using uplink multiple input multiple output technology


The present invention discloses a communication method and system using mimo technology. The communication method includes: a network side device determines whether a ue uses a single-stream mode or a multi-stream mode as an uplink data transmission mode; and the network side device notifies the ue of indication information indicating the determined uplink data transmission mode.
Huawei Technologies Co., Ltd.


03/12/15
20150071366 

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.


03/12/15
20150071137 

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.


03/05/15
20150063503 

Maximum likelihood detection


A method of symbol detection in an electronic device employing multi-user multiple input multiple output (mu-mimo) communication over a first transmission layer of first and second transmission layers comprises various steps. A receiver comprises processing circuitry for performing these steps.
Blackberry Limited


03/05/15
20150063480 

Usage of multiflow and multiple input multiple output in cellular communication systems


For each base station of k base stations of a cellular communications network a maximum number of wanted data streams per carrier is decided that is to be scheduled to a terminal accessing the cellular communications network. The terminal has nr receive antennas and k is an integer equal to or greater than two.

03/05/15
20150063478 

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.


03/05/15
20150063294 

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


A method for transmitting, by a base station, configuration information for a reference signal for channel measurement. The method according to one embodiment includes transmitting, to a user equipment, first resource information for indicating a first pattern, first subframe information for indicating a first subframe, second resource information for indicating a second pattern, and second subframe information for indicating a second subframe.
Lg Electronics Inc.


03/05/15
20150063293 

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.


02/19/15
20150049698 

Method 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


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


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


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


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


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


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


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


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


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




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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