Millimeter Wave Beam Training and Tracking
Beam training is the search procedure that the transmitter and/or the receiver selects one or multiple beams from its beam training codebook (a set of predefined beams), so as to achieve the necessary link budget for subsequent communications via transmitting or receiving signals with these beams. Beam tracking is the adjustment procedure that the transmitter and/or the receiver adjusts its beams to guarantee the link stability for time-varying propagation environment. Beam training and tracking are usually used in the millimeter wave communications to combat the severe path-loss of signal propagation and the user mobility, respectively.
Millimeter wave (mmwave) communications operating in the band of 30–300 GHz has attracted much attention recently and also been recognized as a promising technology for future mobile networks, owing to its abundant spectrum resources (Xiao et al. 2017). However,...
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