Impact of high mobility on constant envelope precoded multi-user massive MIMO systems

In this paper, the impact of high mobility on the constant envelope (CE) precoded multi-user massive multiple-input multiple-output (MIMO) systems is analyzed. We derive a closed-form expression for the achievable ergodic information rate taking into account the impact of channel estimation error due to high mobility. The system performance is evaluated in terms of both achievable ergodic per-user information rate and bit-error-rate (BER) by numerical simulations. The performance of systems with various configurations is presented, which shows that channel estimation error caused by high mobility degrades the performance and increasing ratio of base station (BS) antennas to users reduces the degradation of performance.