Research Article
Robust Hybrid Beamforming for Multi-user Millimeter Wave Systems with Sub-connected Structure
@INPROCEEDINGS{10.1007/978-3-031-34790-0_9, author={Zhen Luo and Lang Luo and Xin Zhang and Hongqing Liu}, title={Robust Hybrid Beamforming for Multi-user Millimeter Wave Systems with Sub-connected Structure}, proceedings={Communications and Networking. 17th EAI International Conference, Chinacom 2022, Virtual Event, November 19-20, 2022, Proceedings}, proceedings_a={CHINACOM}, year={2023}, month={6}, keywords={millimeter wave hybrid beamforming multi-user estimation errors sub-connected}, doi={10.1007/978-3-031-34790-0_9} }- Zhen Luo
Lang Luo
Xin Zhang
Hongqing Liu
Year: 2023
Robust Hybrid Beamforming for Multi-user Millimeter Wave Systems with Sub-connected Structure
CHINACOM
Springer
DOI: 10.1007/978-3-031-34790-0_9
Abstract
In this paper, we investigate a millimeter wave multi-user system to further improve the spectral efficiency. Millimeter wave channels with correlated estimation errors and sub-connected structures are considered to develop a two-stage hybrid beamforming scheme. In the first stage, the analog parts of beamformers are designed to maximize RF-to-RF channel gains. In the second stage, the digital parts of the beamformers are optimized by utilizing the equivalence between the maximization of mutual information and the minimization of weighted minimum mean square error. The numerical results show that the proposed scheme has superior performance over other existing designs.
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