US 12,009,898 B2
Channel state information (CSI) with spatial and time domain compression
Liangming Wu, Beijing (CN); Chenxi Hao, Beijing (CN); Qiaoyu Li, Beijing (CN); Chao Wei, Beijing (CN); Wanshi Chen, San Diego, CA (US); Joseph Binamira Soriaga, San Diego, CA (US); and Yu Zhang, Beijing (CN)
Assigned to QUALCOMM Incorporated, San Diego, CA (US)
Appl. No. 17/288,496
Filed by QUALCOMM Incorporated, San Diego, CA (US)
PCT Filed Oct. 30, 2019, PCT No. PCT/CN2019/114247
§ 371(c)(1), (2) Date Apr. 23, 2021,
PCT Pub. No. WO2020/088496, PCT Pub. Date May 7, 2020.
Claims priority of application No. PCT/CN2018/113808 (WO), filed on Nov. 2, 2018.
Prior Publication US 2021/0391910 A1, Dec. 16, 2021
Int. Cl. H04B 7/06 (2006.01); H04B 7/0408 (2017.01)
CPC H04B 7/0658 (2013.01) [H04B 7/0408 (2013.01); H04B 7/0617 (2013.01); H04B 7/0639 (2013.01)] 27 Claims
OG exemplary drawing
 
1. A method of wireless communications by a first wireless communications device, the method comprising:
receiving one or more signals from a second wireless communications device;
determining a precoder matrix index (PMI) based on the signals;
determining one or more parameters for performing a frequency domain compression of the PMI to select a first subset of a plurality of taps corresponding to a plurality of beams based on a time domain representation of the PMI in a first stage and to select a second subset of the first subset for each beam of the plurality of beams in a second stage;
performing the frequency domain compression of the PMI according to the parameters; and
transmitting information regarding the frequency domain compressed PMI to the second wireless communications device.