Patent ID: 11943022
Assignee: INTEL CORPORATION
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 10:
11. The apparatus of claim 1, wherein the processing circuitry is further arranged to, for communications above 6 GHz:
determine a reference signal sub-carrier group assigned to the base station, the reference signal sub-carrier group having P frequency locations uniformly spaced across an entire bandwidth used by the base station,
use M random beamformers on M orthogonal frequency-division multiplexing (OFDM) symbols received on M different measurement beams by Nr antenna elements, each random beamformer being a Nr×1 vector of independent random phases generated using Nr phase shifters, where M<Nr,
perform channel sounding on the M OFDM symbols using a different beamformer for each OFDM symbol, where each OFDM symbol is N samples long with inter sub-carrier frequency δf bandwidth of N δf, and
perform channel estimation using M×P samples of the M OFDM symbols and detect an optimal beam, of the measurement beams, from a beamforming codebook that is able to differ from a measurement beamforming codebook used to measure pilot signals.