A Low Complexity Hybrid Precoding Scheme for Massive MIMO System

In this paper, we propose a hybrid precoding scheme utilizing traditional linear precoding methods to achieve approximate optimal performance with low complexity. The proposed scheme implements phase control using linear precoding methods at the analog precoding domain and employs the same linear precoding method in the digital domain to maintain the antenna gain. We simulate our proposed schemes in both Rayleigh fading channels and a geometric channel based on the extended Saleh-Valenzuela model. The simulation results prove that the proposed scheme can achieve desirable performance in both channel models and has flexibility for various network conditions by combining with different linear precoding methods.