公开(公告)号：US11881916B2

公开(公告)日：2024-01-23

申请号：US17643997

申请日：2021-12-13

Applicant: Huawei Technologies Co., Ltd.

Inventor： Senbao Guo ,  Guibao Li ,  Zhiying Wang

IPC: H04B7/0456 ,  H04W52/36

CPC classification number: H04B7/0456 ,  H04W52/367

Abstract: This application provides a precoding method and an apparatus for improving a power utilization of antennas. The method includes: determining a generalized inverse matrix Hm+ of a channel value matrix Hm of K users in an mth iteration in J iteration operations, where m=1, 2, . . . , and J, 1≤J≤M−K+1, and M is a quantity of antennas; selecting, from a set S1m-1 based on Hm+, an antenna index nm and an update coefficient αm corresponding to nm, where S1m-1 is a set of n unselected in antenna indexes n of the M antennas until an (m−1)th iteration ends; determining a weight matrix Wm based on Hm+ and αm; and assigning a row in Wm and corresponding to nm to a row in a final weight matrix Wopt and corresponding to nm, where Wopt is to adjust transmit powers of at least J of the M antennas to a preset maximum transmit power P after the J iteration operations end.

公开(公告)号：US10567062B2

公开(公告)日：2020-02-18

申请号：US16009185

申请日：2018-06-14

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Fei Yang ,  Zhiying Wang ,  Chengsheng Que

IPC: H04B7/06 ,  H04B7/0413 ,  H04L5/00

Abstract: This application discloses a downlink channel reconstruction method and apparatus. In one embodiment, the method includes: sending, by a base station, multiple different weighted pilot signals to a terminal, where each of the weighted pilot signals includes a product of a pilot signal and a weighting matrix; receiving, by the base station, multiple different optimal code words returned by the terminal, where each of the optimal code words is obtained based on a channel estimation of a weighted pilot signal; and reconstructing, by the base station, a downlink channel according to the multiple different optimal code words. According to the foregoing method, a quantization error can be reduced, so that a beam direction of a reconstructed channel correctly points to the terminal.

公开(公告)号：US11817929B2

公开(公告)日：2023-11-14

申请号：US17484936

申请日：2021-09-24

Applicant: Huawei Technologies Co., Ltd.

Inventor： Yunfeng Sun ,  Guibao Li ,  Chenhong Lu ,  Qunfang Lou ,  Zhiying Wang ,  Feng Li

IPC: H04B7/06 ,  H04L5/00 ,  H04W24/08

CPC classification number: H04B7/0626 ,  H04L5/0048 ,  H04W24/08

Abstract: A channel state information measurement method and apparatus and a network side device are described. The measurement method includes configuring, by a network side device, channel state information reference signal (CSI-RS) transmit information of M access points. The CSI-RS transmit information is used to indicate the M access points to periodically send a CSI-RS to a first user equipment at a preset interval. The preset interval is a time interval and/or a subband interval, and M is an integer greater than 1. The network side device obtains channel state information (CSI) corresponding to each of the M access points. The CSI corresponding to the access point includes first CSI, and the first CSI is information that is measured based on the CSI-RS corresponding to the access point and fed back by the first user equipment.