Channel Estimation and Passive Beamforming for Intelligent Reflecting Surface: Discrete Phase Shift and Progressive Refinement - You, Changsheng; Zheng, Beixiong; Zhang, Rui (IEEE journal on selected areas in communications, 2020)
Keywords: Array signal processing; Beamforming; Channel estimation; Channels; Communications systems; Data communication; Data transmission; Design; discrete phase shift; Hardware; Intelligent reflecting surface; passive beamforming; Phase shift; Reconfigurable intelligent surfaces; Reflection; Training; Wireless communication