Apparatus and method for channel sounding

Abstract

Provided is an operating method of a first device communicating with a second device in a wireless local area network (WLAN) system, the WLAN system including the first device and the second device, and the method including estimating channels corresponding to a plurality of subcarriers using a null data packet (NDP) received from the second device to obtain estimated channels, generating beam steering matrices corresponding to the plurality of subcarriers by performing singular value decomposition on the estimated channels, generating overridden angle information based on the beam steering matrices, the overridden angle information corresponding to target subcarriers among the plurality of subcarriers, and transmitting beamforming feedback to the second device, the beamforming feedback including the overridden angle information.

Dependencies are inferred from the claim text.