US 12,335,005 B2
Beamforming feedback reduction in wifi
Sayak Roy, Kolkata (IN); Ankit Sethi, Pune (IN); and Sudhir Srinivasa, Los Gatos, CA (US)
Assigned to NXP USA, Inc., Austin, TX (US)
Filed by NXP USA, Inc., Austin, TX (US)
Filed on Nov. 17, 2023, as Appl. No. 18/512,796.
Claims priority of application No. 202221066010 (IN), filed on Nov. 17, 2022.
Prior Publication US 2024/0171238 A1, May 23, 2024
Int. Cl. H04B 7/06 (2006.01); H04L 5/00 (2006.01); H04W 84/12 (2009.01)
CPC H04B 7/0617 (2013.01) [H04B 7/0634 (2013.01); H04L 5/0048 (2013.01); H04W 84/12 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A method for beamforming feedback reduction in a WLAN (wireless local area network), comprising:
receiving, by a beamformee, a sounding packet having a set of feedback tones;
deriving a set of channel coefficients from the sounding packet;
forming a channel matrix for each tone in the set of feedback tones;
computing a singular value decomposition (SVD) on a subset of the feedback tones;
deriving a plurality of steering matrices as right singular matrices from the SVD;
vectorizing each of the steering matrices into a plurality of vectors;
performing a lossy compression on the plurality of vectors to form a lossy compression matrix; and
generating a set of per-tone beamforming angle information from the lossy compression matrix.