Angular-Domain Selective Channel Tracking and Doppler Compensation for High-Mobility mmWave Massive MIMO

In this paper, we consider a mmWave massive multiple-input multiple-output (MIMO) communication system with one static base station (BS) serving fast-moving user, both equipped very large array. The transmitted signal arrives at the user through multiple paths, each different angle-of-arrival (AoA) and hence Doppler frequency offset (DFO), thus resulting in fast time-varying multipath fading MIMO channel. order to mitigate Doppler-induced channel aging for reduced pilot overhead, propose new angular-domain selective tracking compensation scheme side. Specifically, formulate joint estimation of partial DFO parameters as dynamic compressive sensing (CS) problem. Then Doppler-aware-dynamic variational Bayesian inference (DD-VBI) algorithm solve problem efficiently. Finally, practical which selects dominant paths thereby converts it into slow effective Compared existing methods, proposed can enjoy huge array gain provided by also balance tradeoff between CSI signaling overhead spatial multiplexing gain. Simulation results verify advantages over various baseline schemes.