公开(公告)号：US20190334591A1

公开(公告)日：2019-10-31

申请号：US16504832

申请日：2019-07-08

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Kunpeng LIU ,  Xueru LI ,  Bingyu QU

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

Abstract: The present disclosure relates to information feedback methods and apparatus. One example method includes receiving signaling from a base station, where the signaling is used to instruct to feed back transmit diversity-based channel state information and sending feedback information to the base station, where the feedback information includes precoding matrix indicator (PMI), the PMI is used to indicate a precoding matrix in a precoding matrix set, and a structure of the precoding matrix is one of two specific structures.

公开(公告)号：US20190326974A1

公开(公告)日：2019-10-24

申请号：US16460662

申请日：2019-07-02

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Xueru LI ,  Kunpeng LIU ,  Bingyu QU

IPC: H04B7/06 ,  H04B7/0456

Abstract: Embodiments of the present invention provide a communication method, a base station, and a terminal device. The method includes: transmitting, by a base station, signals to a terminal device by using n port groups, where each of the n port groups includes at least two ports; and receiving, by the base station, s first linear combination coefficient groups transmitted by the terminal device, where each first linear combination coefficient group includes first linear combination coefficients of one of s port groups, at least one first linear combination coefficient group includes at least two non-zero coefficients, the s first linear combination coefficient groups are used to determine a first precoding matrix, the s port groups are included in the n port groups. This can improve channel feedback precision of the terminal device, and further help improve performance of transmission between the base station and the terminal device.

公开(公告)号：US20190238198A1

公开(公告)日：2019-08-01

申请号：US16375312

申请日：2019-04-04

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Ruiqi ZHANG ,  Xueru LI

IPC: H04B7/0456 ,  H04B7/06 ,  H04L1/00 ,  H04L5/00

Abstract: This application provides a method for determining a precoding matrix set, so as to avoid a case in which a relatively large quantity of precoding matrices in a precoding matrix set cannot be used, thereby improving system performance. A terminal device receives indication information from a network device, and determines a second precoding matrix set from a first precoding matrix set whose rank is R based on the indication information. Each precoding matrix W in the first precoding matrix set satisfies W=W1×W2, the second precoding matrix set is a proper subset of the first precoding matrix set, and the second precoding matrix set does not include W=W1×W2 that satisfies the specific condition in the first precoding matrix set.