Receiving beam selection using hybrid channel based beamforming and codebook based beamforming

An apparatus of a user equipment (UE), comprising:

• a memory;
• and
• a processor communicatively coupled to the memory and configured to:
• determine, 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, derive, 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
• select a receiving beam of the UE from a codebook (CB) for communication between the UE and a 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).

A non-transitory computer-readable medium storing instructions that, when executed by a processor of a user equipment (UE), cause the UE to perform operations, the operations 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 a 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).