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arXiv 2007.11704eess.SP
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基于统计CSI的RIS辅助多对通信分析与优化

Analysis and Optimization for RIS-Aided Multi-Pair Communications Relying on Statistical CSI

Zhangjie Peng, Tianshu Li, Cunhua Pan, Hong Ren, Wei Xu, Marco Di Renzo

摘要:

本文研究了一种可重构智能表面(RIS)辅助的多对通信系统,其中多对用户通过RIS交换信息。我们通过假设统计信道状态信息(CSI)是可用的,推导出可达速率的近似表达式。提出了一种求解速率最大化问题的遗传算法。特别是,我们考虑实现的RIS连续相移(CPS)和离散相移(DPS)。仿真结果验证了所得结果的正确性,并表明所提出的遗传算法具有几乎相同的性能作为全局最优解。此外,数值结果表明,三个量化比特可以实现的CPS设置的总和可实现的速率的大部分。

英文摘要:

In this paper, we investigate a reconfigurable intelligent surface (RIS) aided multi-pair communication system, in which multi-pair users exchange information via an RIS. We derive an approximate expression of the achievable rate by assuming that statistical channel state information (CSI) is available. A genetic algorithm (GA) to solve the rate maximization problem is proposed as well. In particular, we consider implementations of RISs with continuous phase shifts (CPSs) and discrete phase shifts (DPSs). Simulation results verify the correctness of the obtained results and show that the proposed GA method has almost the same performance as the globally optimal solution. In addition, numerical results show that three quantization bits can achieve a large portion of the sum achievable rate for the CPSs setup.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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