US 12,362,803 B2
Precoder matrix quantization for compressed CSI feedback
Min Huang, Beijing (CN); Chenxi Hao, Beijing (CN); Yu Zhang, San Diego, CA (US); Chao Wei, Beijing (CN); Liangming Wu, Beijing (CN); and Qiaoyu Li, Beijing (CN)
Assigned to QUALCOMM Incorporated, San Diego, CA (US)
Filed by QUALCOMM Incorporated, San Diego, CA (US)
Filed on Jun. 11, 2024, as Appl. No. 18/740,247.
Application 18/740,247 is a continuation of application No. 17/425,018, granted, now 12,047,142, previously published as PCT/CN2020/073761, filed on Jan. 22, 2020.
Prior Publication US 2024/0333356 A1, Oct. 3, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. H04B 7/06 (2006.01); H04B 7/0417 (2017.01)
CPC H04B 7/0626 (2013.01) [H04B 7/0417 (2013.01); H04B 7/0634 (2013.01); H04B 7/0658 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method for wireless communications by a user equipment (UE), the method comprising:
receiving a channel state information (CSI) report configuration for frequency domain compressed precoder matrix feedback, wherein the CSI report configuration configures the UE to report, for a plurality of selected beams at a plurality of time domain taps, a frequency domain compression basis vector and a plurality of linear combination coefficients associated with the frequency domain compression, wherein the linear combination coefficients comprise amplitude coefficients;
for each of the plurality of beams, grouping the time domain taps into at least a first group and a second group, wherein a number of time domain taps in each group is zero, one, or greater than one; and
quantizing at least one of: the corresponding linear combination coefficients or the frequency domain compression basis vectors based on the grouping, comprising quantizing the amplitude coefficients in the first group individually using a first number of bits and quantizing the amplitude coefficients in the second group by quantizing a common value for all of the amplitude coefficients in the second group with the second number of bits, and quantizing a differential value for all of the amplitude coefficients in the second group with a third number of bits.