论文标题
通过截止率优化RIS AID的MIMO系统
Optimization of RIS-aided MIMO Systems via the Cutoff Rate
论文作者
论文摘要
关于优化具有离散信号传导的可重构智能表面（RIS）辅助通信系统中相互信息（MI）的主要困难是无法以可分析的可触犯方式提出此优化问题。因此，我们建议将截止率（CR）用作更易于处理的度量，以优化MI，并引入两种优化方法以最大化CR，假设对通道状态信息（CSI）的完美知识。第一种方法基于投影梯度方法（PGM），而第二种方法是从连续凸近似（SCA）的原理得出的。仿真结果表明，提出的优化方法显着增强了CR和相应的MI。
The main difficulty concerning optimizing the mutual information (MI) in reconfigurable intelligent surface (RIS)-aided communication systems with discrete signaling is the inability to formulate this optimization problem in an analytically tractable manner. Therefore, we propose to use the cutoff rate (CR) as a more tractable metric for optimizing the MI and introduce two optimization methods to maximize the CR, assuming perfect knowledge of the channel state information (CSI). The first method is based on the projected gradient method (PGM), while the second method is derived from the principles of successive convex approximation (SCA). Simulation results show that the proposed optimization methods significantly enhance the CR and the corresponding MI.
