US 11,936,455 B2
Channel state information feedback method and device
Hui Li, Beijing (CN); Qiubin Gao, Beijing (CN); Zhengxuan Liu, Beijing (CN); and Runhua Chen, Beijing (CN)
Assigned to DATANG MOBILE COMMUNICATIONS EQUIPMENT CO., LTD., Beijing (CN)
Appl. No. 17/598,834
Filed by DATANG MOBILE COMMUNICATIONS EQUIPMENT CO., LTD., Beijing (CN)
PCT Filed Feb. 26, 2020, PCT No. PCT/CN2020/076840
§ 371(c)(1), (2) Date Sep. 27, 2021,
PCT Pub. No. WO2020/192346, PCT Pub. Date Oct. 1, 2020.
Claims priority of application No. 201910239518.3 (CN), filed on Mar. 27, 2019.
Prior Publication US 2022/0182121 A1, Jun. 9, 2022
Int. Cl. H04B 7/06 (2006.01); H04B 7/0456 (2017.01)
CPC H04B 7/0626 (2013.01) [H04B 7/0469 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A channel state information feedback method, the method comprising:
determining, by a terminal, an orthogonal beam group and precoding matrix information according to codebook parameter information; wherein a same beam in the orthogonal beam group has same specified coefficients in first and second polarization directions, each of the specified coefficients comprises an amplitude coefficient and/or a phase coefficient, the precoding matrix information comprises the specified coefficients and adjustment factors, the adjustment factors are used together with the specified coefficients to determine linear combination coefficients except the specified coefficients in a linear combination coefficient set; wherein the specified coefficients are a part of coefficients in the linear combination coefficient set;
sending the precoding matrix information to a network-side device.