公开(公告)号：US11139869B2

公开(公告)日：2021-10-05

申请号：US16938582

申请日：2020-07-24

Applicant: Huawei Technologies Co., Ltd.

Inventor： Xiaohan Wang ,  Huangping Jin ,  Xiang Ren ,  Wei Han ,  Xiaoyan Bi

IPC: H04L25/02 ,  H04B7/0417 ,  H04B7/0456

Abstract: Embodiments of this application disclose a channel estimation method and apparatus, and relate to the field of communications technologies, to help reduce indication overheads. The method may include: generating and sending indication information, where the indication information is used to indicate M N-dimensional precoding vectors, each precoding vector is applied to one of M frequency bands, the M N-dimensional precoding vectors form a space-frequency matrix, and the space-frequency matrix is generated by performing weighted combination on a plurality of space-frequency component matrices, where the space-frequency matrix is an M×N-dimensional space-frequency vector or an X×Y space-frequency matrix, X and Y are one and the other of M and N, M≥1, N≥2, and both M and N are integers.

公开(公告)号：US11115091B2

公开(公告)日：2021-09-07

申请号：US16728388

申请日：2019-12-27

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Huangping Jin ,  Peng Jiang ,  Xiaoyan Bi ,  Wei Han

IPC: H04L27/20 ,  H04B7/0456 ,  H04B7/06 ,  H04B7/10 ,  H04L7/00 ,  H04L5/14

Abstract: Embodiments of this application disclose channel state information feedback and receiving methods, a transmit-end device and a receive-end device, and relate to the field of communications technologies. The method includes: generating and sending, by a transmit-end device, codebook indication information of K transport layers, where K is an integer greater than or equal to 2; the codebook indication information includes: L pieces of beam information used by the K transport layers, and indication information used to indicate beam information associated with each of the K transport layers; L is an integer greater than or equal to 2, and a quantity of pieces of beam information associated with at least one of the K transport layers is less than L. Implementing a channel state information feedback and receiving technology provided in this application helps reduce feedback overheads of channel state information.

公开(公告)号：US20210167835A1

公开(公告)日：2021-06-03

申请号：US17171714

申请日：2021-02-09

Applicant: Huawei Technologies Co., Ltd.

Inventor： Xiaohan Wang ,  Huangping Jin ,  Xiaoyan Bi

IPC: H04B7/06 ,  H04B7/10 ,  H04B7/0456

Abstract: A precoding matrix indicating and determining method, including determining a precoding matrix indicator (PMI) having R groups of space-frequency information corresponding to R transmission layers, where the R groups of space-frequency information are used to determine a precoding matrix of each subband, and an rth group of space-frequency information in the R groups indicates P×L space domain vectors corresponding to an rth transmission layer in the R transmission layers, K frequency domain vectors corresponding to the rth transmission layer, and P×L×K coefficients corresponding to the rth transmission layer, where each of the P×L×K coefficients indicates a linear superposition coefficient of a vector operation result of a P×L space domain vectors and one of the K frequency domain vectors, R is a quantity of transmission layers, P is a quantity of polarization directions, and R, r, P, L, and K are all positive integers, and sending the PMI.

公开(公告)号：US10911109B2

公开(公告)日：2021-02-02

申请号：US16805374

申请日：2020-02-28

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Peng Jiang ,  Huangping Jin ,  Wei Han ,  Peng Shang

IPC: H04B7/06 ,  H04B7/0456

Abstract: This application disclose a method for indicating and determining a precoding vector related to precoding technologies to increase an overall system performance gain. The method may include: generating indication information, and sending the indication information. The indication information is used to indicate a plurality of component vectors of a precoding vector and a combination coefficient of each component vector. The combination coefficient of the component vector includes at least one of the following types: a wideband amplitude coefficient, a narrowband amplitude coefficient, and a narrowband phase coefficient.

公开(公告)号：US10608714B2

公开(公告)日：2020-03-31

申请号：US16576594

申请日：2019-09-19

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Peng Jiang ,  Huangping Jin ,  Wei Han ,  Peng Shang

IPC: H04B7/0456

Abstract: This application disclose a method for indicating and determining a precoding vector related to precoding technologies to increase an overall system performance gain. The method may include: generating indication information, and sending the indication information. The indication information is used to indicate a plurality of component vectors of a precoding vector and a combination coefficient of each component vector. The combination coefficient of the component vector includes at least one of the following types: a wideband amplitude coefficient, a narrowband amplitude coefficient, and a narrowband phase coefficient.

公开(公告)号：US12284018B2

公开(公告)日：2025-04-22

申请号：US17241165

申请日：2021-04-27

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Huangping Jin ,  Xiaohan Wang ,  Xiaoyan Bi

IPC: H04B7/06 ,  H04L1/1607

Abstract: Example precoding vector indication methods, precoding vector determining methods, and communications apparatus to reduce feedback overheads are described. One example method includes generating and sending a channel state information (CSI) report by a terminal device. A network device determines a precoding vector of one or more frequency domain units based on the CSI report. The CSI report is used to indicate M space-frequency units and a weighting coefficient of a part or all of the M space-frequency units, each of the M space-frequency units corresponds to one beam vector and one frequency domain vector, and a weighted sum of the part or all of the M space-frequency units is used to determine the precoding vector of the one or more frequency domain units.

公开(公告)号：US12244382B2

公开(公告)日：2025-03-04

申请号：US17887209

申请日：2022-08-12

Applicant: Huawei Technologies Co., Ltd.

Inventor： Shibin Ge ,  Huangping Jin ,  Xiaohan Wang ,  Yiling Yuan ,  Xiaoyan Bi

IPC: H04B7/06 ,  H04B7/0456

Abstract: A channel state information feedback method includes: a terminal receives first indication information from a network device, and the terminal sends channel state information to the network device. The first indication information is used to indicate a type of a right multiplication matrix in a first codebook, and the first codebook satisfies a formula (I). W is the first codebook, W1 is a port selection matrix, (II) is a linear superposition coefficient matrix, Wf is the right multiplication matrix, and (III) is a conjugate transpose of Wf, and is used by the terminal to determine the channel state information based on the first codebook. According to the method, when there are a plurality of codebooks, the codebook used by the terminal to obtain the CSI can be clearly indicated.

公开(公告)号：US20240421866A1

公开(公告)日：2024-12-19

申请号：US18819597

申请日：2024-08-29

Applicant: Huawei Technologies Co., Ltd.

Inventor： Ting Li ,  Xiaohan Wang ,  Huangping Jin

IPC: H04B7/0456 ,  H04B7/06

Abstract: This application provides a channel state information feedback method and a communication apparatus. The method includes: A first apparatus generates indication information, and sends the indication information. The indication information is used to determine at least two precoding submatrices. Different precoding submatrices correspond to different port groups, and the different port groups may correspond to different stations. According to the channel state information feedback method provided in this application, the first apparatus may indicate the information for determining the at least two precoding submatrices, so that coherent joint transmission can be performed between a plurality of stations.

公开(公告)号：US20230164004A1

公开(公告)日：2023-05-25

申请号：US18158216

申请日：2023-01-23

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Yiling Yuan ,  Shibin Ge ,  Huangping Jin ,  Xiaoyan Bi

IPC: H04L25/02

CPC classification number: H04L25/0224

Abstract: Embodiments of this application disclose methods and apparatuses for obtaining channel parameters. In an implementation, a method includes, sending, by a network device, a precoded reference signal and indication information indicating K selected frequency domain bases, wherein the precoded reference signal is generated on P ports by mapping K virtual ports associated with the K selected frequency domain bases to each of the P ports through beamforming, wherein K is an integer greater than 1, and wherein the P ports are precoded channel state information reference signal (CSI-RS) ports of the network device and user equipment, and receiving, by the network device, a linear superposition coefficient sent by the user equipment, wherein the linear superposition coefficient corresponds to M frequency domain bases in the K selected frequency domain bases and T ports in the P ports, wherein 1≤T≤P, and 1≤M≤K.

公开(公告)号：US11445396B2

公开(公告)日：2022-09-13

申请号：US16674858

申请日：2019-11-05

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Wei Han ,  Huangping Jin ,  Ye Wu ,  Xiaoyan Bi

IPC: H04W24/10 ,  H04B7/06 ,  H04L5/00 ,  H04L25/02 ,  H04W72/04

Abstract: Embodiments of the present invention provide a channel measurement method and an apparatus. The method includes: for a to-be-measured frequency band that includes at least one reporting subband and 0 or more non-reporting subbands, obtaining channel state information of each reporting subband, where the channel state information of each reporting subband is obtained based on channel estimation, and the at least one reporting subband is included in reporting subbands that are contiguous in frequency domain, or the at least one reporting subband is included in reporting subbands that are not contiguous in frequency domain; and sending a measurement report of the to-be-measured frequency band to a transmit end device, where the measurement report includes the channel state information of one or more of the at least one reporting subband.