公开(公告)号：US10511363B2

公开(公告)日：2019-12-17

申请号：US16256898

申请日：2019-01-24

Applicant: Samsung Electronics Co., Ltd.

Inventor： Ahmed Ibrahim ,  Young-Han Nam ,  Yeqing Hu ,  Eun Yong Kim ,  Jianzhong Zhang

IPC: H04B7/04 ,  H04B7/0456 ,  H04B7/06 ,  H04B17/309 ,  H04B7/0426

Abstract: Base station (BS) capable of beamforming in a wireless communication includes a transceiver comprising an antenna array, the transceiver configured to measure SRS from a UE, using at least one portion of the antenna array, and a processor configured to select at least one UL beam vector based on an SRS measurement from a UL beam-codebook comprising a set of beam weight vectors, determine at least one DL beam weight vector corresponding to each of the selected at least one UL beam weight vector, transmit a beamformed CSI-RS by applying the at least one DL beam weight vector to the antenna array, receive a CSI feedback including a PMI from the UE, wherein the PMI is determined based on the beamformed CSI-RS, and construct a precoding channel matrix for the UE based on the PMI and the at least one DL beam weight vector.

公开(公告)号：US10911111B2

公开(公告)日：2021-02-02

申请号：US16594918

申请日：2019-10-07

Applicant: Samsung Electronics Co., Ltd.

Inventor： Yeqing Hu ,  Ahmed Ibrahim ,  Young-Han Nam ,  Jianzhong Zhang ,  Eun Yong Kim

IPC: H04L1/02 ,  H04B7/0456 ,  H04B7/0417 ,  H04B7/0452

Abstract: A method of a base station (BS) in a wireless communication system is provided, The method comprises: receiving, from a user equipment (UE), a 1st layer sounding reference signal (SRS); arranging the 1st layer SRS based on two antenna polarizations of an antenna system of the BS; identifying a dominant direction of a channel based on the 1st layer SRS; identifying a coefficient between two antenna polarizations based on the 1st layer SRS; constructing a 2-layer channel matrix based on the identified dominant direction and the identified coefficient; and transmitting, to the UE, a downlink signal via the antenna system based on the constructed 2-layer channel matrix.

公开(公告)号：US20190341978A1

公开(公告)日：2019-11-07

申请号：US16256898

申请日：2019-01-24

Applicant: Samsung Electronics Co., Ltd.

Inventor： Ahmed Ibrahim ,  Young-Han Nam ,  Yeqing Hu ,  Eun Yong Kim ,  Jianzhong Zhang

IPC: H04B7/0456 ,  H04B7/06 ,  H04B17/309

Abstract: Base station (BS) capable of beamforming in a wireless communication includes a transceiver comprising an antenna array, the transceiver configured to measure SRS from a UE, using at least one portion of the antenna array, and a processor configured to select at least one UL beam vector based on an SRS measurement from a UL beam-codebook comprising a set of beam weight vectors, determine at least one DL beam weight vector corresponding to each of the selected at least one UL beam weight vector, transmit a beamformed CSI-RS by applying the at least one DL beam weight vector to the antenna array, receive a CSI feedback including a PMI from the UE, wherein the PMI is determined based on the beamformed CSI-RS, and construct a precoding channel matrix for the UE based on the PMI and the at least one DL beam weight vector.