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arXiv · 2106.02776

Study of Multi-Branch Tomlinson-Harashima Precoding with Multiple-Antenna Systems and Rate Splitting

A. Flores·R. C. de Lamare·B. Clerckx
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Abstract

Rate splitting (RS) has emerged as a valuable technology for wireless communications systems due to its capability to deal with uncertainties in the channel state information at the transmitter (CSIT). RS with linear and non-linear precoders, such as the Tomlinson-Harashima (THP) precoder, have been explored in the downlink (DL) of multiuser multi antenna systems. In this work, we propose a multi-branch (MB) scheme for a RS-based multiple-antenna system, which creates patterns to order the transmitted symbols and enhances the overall sum rate performance compared to existing approaches. Closed-form expressions are derived for the sum rate through statistical analysis. Simulation results show that the proposed MB-THP for RS outperforms conventional THP and MB-THP schemes.

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A. Flores, R. C. de Lamare, B. Clerckx. 2021-06-05. Study of Multi-Branch Tomlinson-Harashima Precoding with Multiple-Antenna Systems and Rate Splitting. https://arxiv.org/abs/2106.02776

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