US 12,381,605 B2
Information transmission method and apparatus
Shijie Cai, Beijing (CN); Kunpeng Liu, Beijing (CN); and Yongxing Zhou, Beijing (CN)
Assigned to HUAWEI TECHNOLOGIES CO., LTD., Shenzhen (CN)
Filed by HUAWEI TECHNOLOGIES CO., LTD., Shenzhen (CN)
Filed on Aug. 5, 2022, as Appl. No. 17/882,068.
Application 17/882,068 is a continuation of application No. PCT/CN2020/074564, filed on Feb. 7, 2020.
Prior Publication US 2022/0385343 A1, Dec. 1, 2022
Int. Cl. H04B 7/0456 (2017.01)
CPC H04B 7/0456 (2013.01) 12 Claims
OG exemplary drawing
 
1. An information transmission method, comprising:
generating, by a terminal device, a first codeword, wherein the first codeword is obtained based on a second codeword, a quantity of elements comprised in the second codeword is greater than a quantity of elements comprised in the first codeword, the second codeword is associated with a first coefficient set corresponding to a plurality of spatial layers or ports having same domain bases of a downlink channel, and the first coefficient set comprises an element comprised in at least one row vector or column vector of a first coefficient matrix corresponding to a spatial layer or port of the plurality of spatial layer or ports, wherein
the first coefficient matrix is determined based on a first matrix, a second matrix, and a third matrix, the third matrix is a channel matrix or a precoding matrix of the downlink channel, and the third matrix satisfies a product of the first matrix, the first coefficient matrix, and the second matrix; the first coefficient matrix is determined based on a first matrix and a third matrix, the third matrix is a channel matrix or a precoding matrix of the downlink channel, and the third matrix satisfies a product of the first matrix and the first coefficient matrix; the first coefficient matrix is determined based on a second matrix and a third matrix, the third matrix is a channel matrix or a precoding matrix of the downlink channel, and the third matrix satisfies a product of the first coefficient matrix and the second matrix; or the first coefficient matrix is determined based on a third matrix, and the third matrix is a channel matrix or a precoding matrix of the downlink channel; and the spatial layer or receive port is in a one-to-one correspondence with the third matrix and the first coefficient matrix;
determining, by the terminal device, a fourth matrix, wherein the second codeword satisfies a product of the fourth matrix and a first vector or satisfies a product of the first vector and the fourth matrix;
wherein the fourth matrix is a dictionary matrix used by the terminal device to compress an element in the first coefficient set; and
feeding back, by the terminal device, the first codeword and the fourth matrix to a network device.