Beam-Steering Aided Hierarchical Codebook for Near-Field Beam Training - Wang, Tao; You, Changsheng; Yin, Changchuan (IEEE open journal of the Communications Society, 2025)
Keywords: Alignment; Antenna arrays; Array signal processing; Beam steering; beam training; Beamforming; Discrete Fourier transforms; extremely large-scale MIMO (XL-MIMO); Far fields; Feedback amplifiers; feedback overhead; hierarchical codebook; Linear antenna arrays; Near fields; near-field communication (NFC); Radio frequency; Radiofrequency identification; Training; training overhead; Vectors