公开(公告)号：US11233550B2

公开(公告)日：2022-01-25

申请号：US16802373

申请日：2020-02-26

Applicant: Samsung Electronics Co., Ltd.

Inventor： Ahmed Atef Ibrahim ,  Yeqing Hu ,  Young-Han Nam ,  Jianzhong Zhang

IPC: H03D3/18 ,  H04B7/0456 ,  H04B7/0417 ,  H04B7/10 ,  H04B7/0452

Abstract: A base station for generating multi-user precoders. The base station includes a transceiver configured to receive sounding reference signals (SRSs) from a set of user equipments (UEs), and a processor configured to select, for one or more UEs in the set of UEs, one or more codewords from an uplink codebook based on a correlation between the one or more codewords and the one or more SRSs; determine, using a composite downlink codebook, downlink codewords for the selected uplink codewords, respectively, the composite downlink codebook mapping uplink codewords to downlink codewords based on steering angles derived from the uplink codewords; transmit a set of pre-coded channel state information reference signals (CSI-RSs) to the one or more UEs, wherein the pre-coded CSI-RSs are pre-coded based on the determined downlink codewords; and identify a downlink channel matrix based on CSI feedback from the one or more UEs and the pre-coded CSI-RSs.

公开(公告)号：US20200336187A1

公开(公告)日：2020-10-22

申请号：US16796688

申请日：2020-02-20

Applicant: Samsung Electronics Co., Ltd.

Inventor： Yeqing Hu ,  Ahmed Atef Ibrahim ,  Jianzhong Zhang

IPC: H04B7/06 ,  H04L5/00 ,  H04B7/0452 ,  H04B7/0456

Abstract: A base station, method, and computer-readable storage medium for channel state information (CSI) acquisition. The base station includes a transceiver configured to transmit a first, unprecoded channel state information reference signal (CSI-RS) on a first antenna dimension; receive a first CSI report on the first antenna dimension; transmit a second, precoded CSI-RS on a second antenna dimension; and receive a second CSI report on the second antenna dimension. The first CSI report includes a precoding matrix index (PMI), a rank indicator (RI), and channel quality indicator (CQI) for the first antenna dimension; and the second CSI report comprises a PMI, a RI, and a CQI for the second antenna dimension. The base station also includes a processor operably connected to the transceiver, the processor configured to generate a downlink (DL) CSI for multi-user multi-input, multi-output (MU-MIMO) scheduling and precoding based on the first CSI report and the second CSI report.

公开(公告)号：US11290167B2

公开(公告)日：2022-03-29

申请号：US16796688

申请日：2020-02-20

Applicant: Samsung Electronics Co., Ltd.

Inventor： Yeqing Hu ,  Ahmed Atef Ibrahim ,  Jianzhong Zhang

IPC: H04B7/06 ,  H04L5/00 ,  H04B7/0456 ,  H04B7/0452

Abstract: A base station, method, and computer-readable storage medium for channel state information (CSI) acquisition. The base station includes a transceiver configured to transmit a first, unprecoded channel state information reference signal (CSI-RS) on a first antenna dimension; receive a first CSI report on the first antenna dimension; transmit a second, precoded CSI-RS on a second antenna dimension; and receive a second CSI report on the second antenna dimension. The first CSI report includes a precoding matrix index (PMI), a rank indicator (RI), and channel quality indicator (CQI) for the first antenna dimension; and the second CSI report comprises a PMI, a RI, and a CQI for the second antenna dimension. The base station also includes a processor operably connected to the transceiver, the processor configured to generate a downlink (DL) CSI for multi-user multi-input, multi-output (MU-MIMO) scheduling and precoding based on the first CSI report and the second CSI report.

公开(公告)号：US20200304182A1

公开(公告)日：2020-09-24

申请号：US16802373

申请日：2020-02-26

Applicant: Samsung Electronics Co., Ltd.

Inventor： Ahmed Atef Ibrahim ,  Yeqing Hu ,  Young-Han Nam ,  Jianzhong Zhang

IPC: H04B7/0456 ,  H04B7/0452 ,  H04B7/10 ,  H04B7/0417

Abstract: A base station for generating multi-user precoders. The base station includes a transceiver configured to receive sounding reference signals (SRSs) from a set of user equipments (UEs), and a processor configured to select, for one or more UEs in the set of UEs, one or more codewords from an uplink codebook based on a correlation between the one or more codewords and the one or more SRSs; determine, using a composite downlink codebook, downlink codewords for the selected uplink codewords, respectively, the composite downlink codebook mapping uplink codewords to downlink codewords based on steering angles derived from the uplink codewords; transmit a set of pre-coded channel state information reference signals (CSI-RSs) to the one or more UEs, wherein the pre-coded CSI-RSs are pre-coded based on the determined downlink codewords; and identify a downlink channel matrix based on CSI feedback from the one or more UEs and the pre-coded CSI-RSs.