Equivalent Channel-Based Joint Hybrid Precoding/Combining For Large-Scale Mimo Systems

Hybrid precoding is a promising solution to reduce hardware cost and power consumption via decreasing the number of RF chains without causing significant performance loss for large-scale MIMO systems. In this paper, for the single-user scenarios with reduced number of RF chains, a joint hybrid precoding scheme, with high spectral efficiency and low complexity, is proposed based on the equivalent channel. Specifically, hybrid precoding and combining tasks are optimized jointly, and some operations in the original precoding scheme at the transmitter is moved to the receiver side by exploiting the concept of equivalent channel. In this manner, the hybrid precoding operation at the transmitter side is designed accurately, and thus system spectral efficiency is enhanced. Simulation results are presented to verify the effectiveness of the proposed hybrid precoding/combining scheme. (C) 2021 Elsevier B.V. All rights reserved.