Priori-aided channel tracking for millimeter-Wave beamspace massive MIMO systems

摘要: Beamspace MIMO can utilize beam selection to reduce the number of required RF chains in mmWave massive systems. However, requires information beamspace channel large size. This is a challenging task, since user mobility usually leads fast variation channels, and real-time estimation involves unaffordable pilot overhead. To solve this problem, paper we propose priori-aided (PA) tracking scheme. Specifically, by considering practical motion model, first excavate temporal law physical direction between base station each mobile user. Then, based on special sparse structure obtained channels previous time slots predict prior following slot. Finally, aided information, time-varying be tracked with low Simulation results verify that proposed PA scheme achieve much better performance than conventional schemes.