公开(公告)号：US20240030981A1

公开(公告)日：2024-01-25

申请号：US18358459

申请日：2023-07-25

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Li FAN ,  Shibin GE ,  Jie WANG ,  Zhimeng ZHONG ,  Qibo QIN ,  Huangping JIN

IPC: H04B7/06

CPC classification number: H04B7/0626 ,  H04B7/0639

Abstract: This application discloses a channel state information feedback method and a communication apparatus. The method includes: determining channel state information based on a first codebook, and sending the channel state information. The first codebook is determined based on a channel represented by one or more spatial-frequency domain column vectors, and the one or more spatial-frequency domain column vectors indicate the channel in joint spatial-frequency domain. In this solution, the first codebook may be determined based on the channel represented by the one or more spatial-frequency domain column vectors. Because the one or more spatial-frequency domain column vectors may represent the channel in joint spatial-frequency domain, that is, the first codebook represents the channel based on joint spatial-frequency domain, a joint spatial-frequency domain feature may be fully used, to explore a sparse feature of the channel, thereby improving system performance.

公开(公告)号：US20250132790A1

公开(公告)日：2025-04-24

申请号：US19002155

申请日：2024-12-26

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Li FAN ,  Qibo QIN ,  Shujing CHEN ,  Zhimeng ZHONG ,  Huangping JIN

IPC: H04B7/0417 ,  H04B7/06

Abstract: Embodiments of this application provide a channel state information (CSI) reporting method and a communications apparatus. In the method, a receiving device obtains first CSI and second CSI, and determines reference information based on the first CSI and the second CSI. The first CSI is correlated with the second CSI, the reference information includes first quantization information including projection quantization information of a common subspace and second quantization information including projection quantization information of a first non-common subspace, the common subspace includes an intersection of a first space used to quantize the first CSI and a second space used to quantize the second CSI, and the first non-common subspace includes a subspace other than the common subspace in the first space. The receiving device sends the reference information to a sending device, and the sending device determines the first CSI based on the reference information and the second CSI.