US 12,224,843 B2
Receiving beam selection using hybrid channel based beamforming and codebook based beamforming
Franz J. Eder, Neubiberg (DE); Adrian Carlos Loch Navarro, Munich (DE); Andre Janssen, Munich (DE); Holger Neuhaus, Munich (DE); and Kenan Kocagoez, Fürth (DE)
Assigned to Apple Inc., Cupertino, CA (US)
Filed by APPLE INC., Cupertino, CA (US)
Filed on Sep. 26, 2023, as Appl. No. 18/474,375.
Application 18/474,375 is a continuation of application No. 17/899,178, filed on Aug. 30, 2022, granted, now 11,824,616.
Claims priority of provisional application 63/238,705, filed on Aug. 30, 2021.
Prior Publication US 2024/0030997 A1, Jan. 25, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. H04B 7/10 (2017.01); H04B 7/06 (2006.01); H04B 7/08 (2006.01)
CPC H04B 7/0857 (2013.01) [H04B 7/0617 (2013.01); H04B 7/0639 (2013.01); H04B 7/086 (2013.01); H04B 7/088 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method of wireless communications by a user equipment (UE) with a base station in a wireless system, comprising:
determining, based on a first measurement related to signal to noise ratio (SNR) and one or more predetermined threshold values, whether the UE is in a low SNR state;
in response to a determination that the UE is in the low SNR state, deriving, based on a second measurement, an estimated channel covariance matrix RCH for channels received by a set of antenna elements of the UE using channel based beamforming (CHBF); and
selecting a receiving beam of the UE from a codebook (CB) for communication between the UE and the base station based on the estimated channel covariance matrix RCH and a set of codebook measurements performed on a set of codebook measurement beams of the codebook at a measurement opportunity for codebook based beamforming (CBBF).