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332 条记录 (耗时 0.034 秒)

    CHANNEL COVARIANCE FEEDBACK FOR ENHANCED FD-MIMO
    33.
    发明申请
    CHANNEL COVARIANCE FEEDBACK FOR ENHANCED FD-MIMO 审中-公开

    公开(公告)号：US20190058560A1

    公开(公告)日：2019-02-21

    申请号：US16078434

    申请日：2017-02-17

    申请人： Bo CHEN ,  Chao WEI ,  Liangming WU ,  Neng WANG ,  QUALCOMM Incorporated

    发明人： Bo CHEN ,  Chao WEI ,  Liangming WU ,  Neng WANG

    IPC分类号： H04L5/00 ,  H04W24/08 ,  H04B7/0413 ,  H04W24/10

    摘要： Channel covariance feedback is disclosed for enhanced full-dimension multiple input, multiple output (eFD-MIMO) systems. Channel state information (CSI) reference signal (CSI-RS) feedback operations are implemented using spatial covariance feedback of a covariance estimate. After obtaining a set of orthogonal basis vectors, a user equipment (UE) measures the CSI-RS from a base station and determines the spatial covariance matrix from the signal. The UE may then compress the spatial covariance matrix into a lower-dimension covariance estimate matrix using the orthogonal basis vectors. The lower-dimension matrix along with element-wise quantization allows for feedback of spatial covariance for eFD-MIMO systems without excessive feedback overhead.

    ENHANCED CSI FEEDBACK FOR FD-MIMO
    34.
    发明申请
    ENHANCED CSI FEEDBACK FOR FD-MIMO 审中-公开

    公开(公告)号：US20180351621A1

    公开(公告)日：2018-12-06

    申请号：US15780451

    申请日：2016-01-07

    申请人： Chao WEI ,  Wanshi CHEN ,  Peter GAAL ,  Yu ZHANG ,  QUALCOMM Incorporated

    发明人： Chao WEI ,  Wanshi CHEN ,  Peter GAAL ,  Yu ZHANG

    IPC分类号： H04B7/06 ,  H04B7/0456 ,  H04L5/00 ,  H04W24/10

    CPC分类号： H04L5/0057 ,  H04B7/0478 ,  H04B7/06 ,  H04B7/0639 ,  H04L5/0023 ,  H04W72/082

    摘要： Enhanced channel state information (CSI) feedback is disclosed for full dimensional multiple input, multiple output (FD-MIMO) operations. In one aspect, a CSI process is defined that may be used to identify an azimuth and elevation CSI-reference signal (RS) ports. A user equipment (UE) will send a precoding matrix indictor (PMI) report including a precoding matrix indicator (PMI) for the azimuth ports and a PMI for the elevation ports. One of the PMIs is assigned a low rank. The base station will use the two PMIs to create a whole channel precoding matrix. In another aspect, a single CSI process is configured having a plurality of CSI-RS resources. The UE generates channel measurement information for each of the CSI-RS resources, but only sets a CSI report to the base station of a subset of the total number of resources.

    NUMBER OF NON-ZERO COEFFICIENTS REPORTING FOR TYPE II CSI CODEBOOK WITH FREQUENCY COMPRESSION
    36.
    发明申请
    NUMBER OF NON-ZERO COEFFICIENTS REPORTING FOR TYPE II CSI CODEBOOK WITH FREQUENCY COMPRESSION 有权

    公开(公告)号：US20220109480A1

    公开(公告)日：2022-04-07

    申请号：US17310748

    申请日：2020-02-22

    申请人： Chenxi HAO ,  Chao WEI ,  Yu ZHANG ,  Liangming WU ,  QUALCOMM Incorporated

    发明人： Chenxi HAO ,  Chao WEI ,  Yu ZHANG ,  Liangming WU

    IPC分类号： H04B7/06 ,  H04B7/0417

    摘要： Certain aspects of the present disclosure provide techniques for channel state information (CSI) reporting with frequency compression. A method that can be performed by a user equipment (UE) includes receiving a CSI report configuration. The CSI report configuration configures the UE for reporting precoding matrix information including, for each layer, a plurality of selected beams L, a plurality of frequency domain compression bases F for the L beams, and a subset of linear combination coefficients associated with the frequency domain compression bases and beams. The UE can determine a number of coefficients to report for a higher rank based on a configured maximum number of coefficients to report for a lower rank.

    PRECODER MATRIX QUANTIZATION FOR COMPRESSED CSI FEEDBACK
    37.
    发明申请
    PRECODER MATRIX QUANTIZATION FOR COMPRESSED CSI FEEDBACK 有权

    公开(公告)号：US20220085855A1

    公开(公告)日：2022-03-17

    申请号：US17425018

    申请日：2020-01-22

    申请人： Min HUANG ,  Chenxi HAO ,  Yu ZHANG ,  Chao WEI ,  Liangming WU ,  Qiaoyu LI ,  QUALCOMM Incorporated

    发明人： Min HUANG ,  Chenxi HAO ,  Yu ZHANG ,  Chao WEI ,  Liangming WU ,  Qiaoyu LI

    IPC分类号： H04B7/06 ,  H04B7/0417

    摘要： Certain aspects of the present disclosure provide techniques for precoder matrix quantization for compressed channel state information (CSI) feedback. A method for wireless communications by a user equipment (UE) (120a) includes receiving a CSI report configuration for frequency domain compressed precoder matrix feedback. The CSI report configuration configures the UE (120a) to report, for a plurality of selected beams at a plurality of time domain taps, a frequency domain compression basis vector and a plurality of linear combination coefficients associated with the frequency domain compression (805). For each of the beams, the UE (120a) groups the time domain taps into at least first and second groups. The groups each can have zero, one, or more than one time domain taps (810). The UE (120a) quantizes the corresponding linear combination coefficients and/or frequency domain compression basis vectors based on the grouping (815).

    LINK QUALITY FEEDBACK FOR DIVERSITY ENHANCEMENT BASED NON-COHERENT JOINT TRANSMISSION
    38.
    发明申请
    LINK QUALITY FEEDBACK FOR DIVERSITY ENHANCEMENT BASED NON-COHERENT JOINT TRANSMISSION 有权

    公开(公告)号：US20210306102A1

    公开(公告)日：2021-09-30

    申请号：US17268867

    申请日：2019-08-05

    申请人： Qiaoyu LI ,  Chao WEI ,  Yu ZHANG ,  Chenxi HAO ,  Liangming WU ,  Hao XU ,  QUALCOMM Incorporated

    发明人： Qiaoyu LI ,  Chao WEI ,  Yu ZHANG ,  Chenxi HAO ,  Liangming WU ,  Hao XU

    IPC分类号： H04L1/16 ,  H04L1/18 ,  H04L1/06

    摘要： Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment may determine a first decoding result for a plurality of downlink control channels of a diversity enhancement based non-coherent joint transmission communication and a second decoding result for a plurality of data channels corresponding to the plurality of downlink control channels; and selectively provide feedback regarding the first decoding result and feedback regarding the second decoding result, the feedback regarding the first decoding result indicating whether reception of one or more downlink control channels, of the plurality of downlink control channels, is successful, and the feedback regarding the second decoding result indicating whether decoding of a codeword of the plurality of data channels is successful. Numerous other aspects are provided.

    SYNCHRONIZED UPLINK GRANT-FREE NON-ORTHOGONAL MULTIPLE ACCESS TRANSMISSION DESIGN
    40.
    发明申请
    SYNCHRONIZED UPLINK GRANT-FREE NON-ORTHOGONAL MULTIPLE ACCESS TRANSMISSION DESIGN 有权

    公开(公告)号：US20210250993A1

    公开(公告)日：2021-08-12

    申请号：US16972674

    申请日：2019-06-12

    申请人： Qiaoyu LI ,  Chao WEI ,  Kai CHEN ,  Hao XU ,  Qualcomm Incorporated

    发明人： Qiaoyu LI ,  Chao WEI ,  Kai CHEN ,  Hao XU

    IPC分类号： H04W74/08 ,  H04B1/69 ,  H04W72/12

    摘要： Methods, systems, and devices for wireless communications are described in which sequence groups, and sequence hopping patterns may be used to distinguish concurrent non-orthogonal multiple access (NOMA) transmissions. A wireless device, such as a user equipment (UE), may identify, for a message, a first transmission opportunity from a plurality of transmission opportunities associated with grant-free uplink contention-based transmissions (e.g., NOMA transmissions); select a multiple access (MA) signature sequence from a group of MA signature sequences associated with the first transmission opportunity; identify a hopping pattern associated with the MA signature sequence; and transmit one or more redundancy versions of the message in one or more of the plurality of transmission opportunities comprising the first transmission opportunity according to the MA signature sequence and the hopping pattern.