Sony Group Corporation
COMMUNICATION DEVICES AND METHODS

Abstract:

A first communication device that simultaneously transmits to a group of two or more second communication devices using multi-user multiple input multiple output (MU-MIMO) communication performs beamforming training with a selected second communication device of said group of second communication devices by transmitting one or more training units, wherein an analog beamforming training matrix and/or a digital beamforming training matrix adapted for beamforming training with the selected second communication device are applied on the one or more training units, receiving from the selected second communication device feedback in response to the transmitted transmit packets, and determining, for use in the simultaneous transmission of data to a group of two or more second communication devices including the selected second communication device, an updated analog beamforming matrix and/or an updated digital beamforming matrix based at least on the received feedback.