Abstract
The hybrid beamforming (HBF) design for terahertz (THz) massive multiple-input multiple-output (mMIMO) communications is an essential but challenging problem in future wireless communications. In this paper, we propose an efficient HBF design framework for downlink multi-user multi-stream transmission in broadband THz mMIMO systems. First, the analytic solutions for digital precoder are derived to minimize the sum-mean-square error between the transmitted and received symbols. Then, we propose a tractable criterion for the codebook-based fully-connected analog precoder design, and further extend it to the case where the dynamic partially-connected structure is considered. A low-complexity energy-based greedy antenna grouping scheme is proposed for the dynamic hybrid structure. Simulation results demonstrate the effectiveness and the superiority of the proposed scheme in terms of sum rate and bit error rate over its counterparts.
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© 2023 ICST Institute for Computer Sciences, Social Informatics and Telecommunications Engineering
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Wan, Z. et al. (2023). Hybrid Beamforming Design for Multi-User Multi-Stream Communications with Terahertz Massive MIMO. In: Zhao, J. (eds) Wireless and Satellite Systems. WiSATS 2023. Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering, vol 509. Springer, Cham. https://doi.org/10.1007/978-3-031-34851-8_5
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DOI: https://doi.org/10.1007/978-3-031-34851-8_5
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