Linear Pre-coding Base on Imperfect CSI in Massive MIMO

Abstract

The estimation of channel state information at the base station in large scale MIMO system directly affects the design of downlink pre-coding matrix and affects the performance of the system. Aiming at the problem of Rayleigh fading channel and Rician Fading Channel estimation error, this paper firstly studies the influence of channel estimation error on the system, and then designs the pre-coding matrix based on the minimum mean square error criterion. The simulation results show that the proposed algorithm is superior to the traditional pre-coding algorithm.