公开(公告)号：US11824616B2

公开(公告)日：2023-11-21

申请号：US17899178

申请日：2022-08-30

Applicant: Apple Inc.

Inventor： Franz J. Eder ,  Adrian Carlos Loch Navarro ,  Andre Janssen ,  Holger Neuhaus ,  Kenan Kocagoez

IPC: H04B7/02 ,  H04B7/08 ,  H04B7/06

CPC classification number: H04B7/0857 ,  H04B7/0617 ,  H04B7/0639 ,  H04B7/086 ,  H04B7/088

Abstract: Some aspects relate to apparatuses and methods for selecting a receiving beam based on hybrid channel based beamforming and codebook based beamforming. A user equipment (UE) can determine, based on a first measurement related to signal to noise ratio (SNR) and predetermined threshold values, whether the UE is in a low SNR state. If the UE is in a low SRN state, the UE can derive an estimated channel covariance matrix RCH for channels at a set of antenna elements of the UE based on channel based beamforming (CHBF). Afterwards, a set of test beams {0, . . . Ntest−1} is selected based on the channel covariance matrix RCH, and a set of codebook measurement beams is further selected based on the set of test beams. A receiving beam is selected based on a set of measurements performed on the set of codebook measurement beams at the measurement opportunity for codebook based beamforming (CBBF).

公开(公告)号：US12224843B2

公开(公告)日：2025-02-11

申请号：US18474375

申请日：2023-09-26

Applicant: APPLE INC.

Inventor： Franz J. Eder ,  Adrian Carlos Loch Navarro ,  Andre Janssen ,  Holger Neuhaus ,  Kenan Kocagoez

IPC: H04B7/10 ,  H04B7/06 ,  H04B7/08

Abstract: Some aspects relate to apparatuses and methods for selecting a receiving beam based on hybrid channel based beamforming and codebook based beamforming. A user equipment (UE) can determine, based on a first measurement related to signal to noise ratio (SNR) and predetermined threshold values, whether the UE is in a low SNR state. If the UE is in a low SRN state, the UE can derive an estimated channel covariance matrix RCH for channels at a set of antenna elements of the UE based on channel based bearmforming (CHBF). Afterwards, a set of test bears {0, . . . Ntest−1} is selected based on the channel covariance matrix RCH, and a set of codebook measurement beams is further selected based on the set of test beams. A receiving beam is selected based on a set of measurements performed on the set of codebook measurement beams at the measurement opportunity for codebook based beamforming (CBBF).