US 11,838,082 B2
Frequency domain channel state information (CSI) compression
Victor Sergeev, Nizhny Novgorod (RU); Alexei Davydov, Nizhny Novgorod (RU); Bishwarup Mondal, San Ramon, CA (US); Gregory Morozov, Nizhny Novgorod (RU); and Dmitry Dikarev, Nizhny Novgorod (RU)
Assigned to APPLE INC., Cupertino, CA (US)
Filed by Apple Inc., Cupertino, CA (US)
Filed on Nov. 23, 2022, as Appl. No. 17/993,511.
Application 17/993,511 is a continuation of application No. 17/417,302, granted, now 11,515,917, previously published as PCT/US2020/014235, filed on Jan. 18, 2020.
Claims priority of provisional application 62/794,220, filed on Jan. 18, 2019.
Prior Publication US 2023/0089326 A1, Mar. 23, 2023
Int. Cl. H04B 7/06 (2006.01); H04B 7/0456 (2017.01)
CPC H04B 7/0626 (2013.01) [H04B 7/0478 (2013.01); H04B 7/0632 (2013.01); H04B 7/0639 (2013.01); H04B 7/0663 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A user equipment (UE), comprising:
at least one processor configured to:
construct a precoding matrix based on a linear combination of a plurality of mutually orthogonal digital Fourier transformation (DFT) spatial beams;
determine a number of bits for a precoding matrix indicator (PMI) of the precoding matrix;
determine a space frequency matrix based, at least in part, on the number of bits for the PMI and the precoding matrix;
compress the space frequency matrix; and
determine a compressed PMI based, at least in part, on the space frequency matrix; and
radio front end circuitry configured to transmit the compressed PMI over a wireless network to a base station (BS).