Beam Training and Tracking Efficiency Analysis for UAV mmWave Communication

摘要

Millimeter-wave (mmWave) communication has the advantage of providing large bandwidth and high throughput. Unmanned Aerial Vehicle (UAV) communication has merit in providing large coverage and flexibility, which can compensate the propagation loss in mmWave communication. In this paper, we study the beam training and beam tracking for UAV mmWave communication. We consider UAV as aerial base stations equipped with multiple antennas serving mobile users on the ground. We firstly study the trade-off between beam training quality and training cost in order to maximize bandwidth efficiency. Then, we propose an efficient motion driven adaptive beam tracking method based on reduced beam training for UAV BS, where we utilize the maximum speed to predict and update the beam direction by transmitting two adjacent beams. Simulation results show that the bandwidth efficiency for beam training and tracking can be optimized, and our proposed method outperforms existing methods in terms of capacity and accuracy.