论文标题
基于MSE的收发器设计，用于与硬件障碍的RIS ADED通信
MSE-Based Transceiver Designs for RIS-Aided Communications With Hardware Impairments
论文作者
论文摘要
由于固有的硬件障碍（HIS），精确配置可重构智能表面（RIS）的反射元素的相移（RIS）是一项挑战。在本文中，使用收发器和RIS相位噪声的RIS辅助单用户多输入多输入（MIMO）通信系统研究了均方误差（MSE）性能。我们的目标是共同优化发射编码器，线性接收的均衡器，并反映矩阵以最小化MSE。为了解决此问题，提出了一种迭代算法，其中对波束形成矩阵进行了交替优化。具体而言，对于波束形成优化的子问题，我们得出了最佳的预码器和均衡器矩阵的闭合形式表达。然后，对于相移优化子问题，提出了一种基于大型化最小化（MM）方法的有效算法。仿真结果表明，提出的基于MSE的RIS AID收发器方案极大地优于常规系统算法，这些算法在收发器和RIS上都不认为他的算法。
It is challenging to precisely configure the phase shifts of the reflecting elements at the reconfigurable intelligent surface (RIS) due to inherent hardware impairments (HIs). In this paper, the mean square error (MSE) performance is investigated in an RIS-aided single-user multiple-input multipleoutput (MIMO) communication system with transceiver HIs and RIS phase noise. We aim to jointly optimize the transmit precoder, linear received equalizer, and RIS reflecting matrices to minimize the MSE. To tackle this problem, an iterative algorithm is proposed, wherein the beamforming matrices are alternately optimized. Specifically, for the beamforming optimization subproblem, we derive the closed-form expression of the optimal precoder and equalizer matrices. Then, for the phase shift optimization subproblem, an efficient algorithm based on the majorization-minimization (MM) method is proposed. Simulation results show that the proposed MSE-based RIS-aided transceiver scheme dramatically outperforms the conventional system algorithms that do not consider HIs at both the transceiver and the RIS.
