A Low-Complexity Hybrid Beamforming Algorithm with One-Bit Resolution Phase Shifters in mmWave MIMO

• 1、School of Information and Communication Engineering, Beijing University of Posts and Telecommunications, Beijing 100876

Abstract：To meet the practical requirements in hybrid beamforming system based on full-connected structure,which is that the low resolution phase shifters should be adopted considering the system cost and energy consumption, a hybrid beamforming algorithm for the one-bit resolution phase shifters scenario is proposed in this paper. First, the candidate set of the analog precoding vectors and the candidate set of the analog combining vectors are established and searched form for the optimal analog precoding vector and the optimal analog combining. The analog precoding matrix and the analog combining matrix are consequently obtained. Then, the digital precoding matrix and the digital combining matrix are determined based on the equivalent baseband channel. Numerical simulation results, which demonstrate the effectiveness of the proposed algorithm, show that the computational complexity of the proposed algorithm is reduced by the order of magnitude of the number of antennas, and the achievable rate of the proposed algorithm is almost the same compared with the comparison algorithm.

Keywords： communication and information system; massive MIMO; hybrid beamforming; one-bit resolution phase shifters我的导师谢刚（xiegang@bupt.edu.cn）同意发表论文 将通过edu邮件说明情况。