In this paper, we study a multi-user visible light communication (VLC) system assisted with optical reflecting intelligent surface (ORIS). Joint precoding and alignment matrices are designed to maximize the average signal-to-interference plus noise ratio (SINR) criteria. Considering the constraints of the constant mean transmission power of LEDs and the power associated with all users, an optimization problem is proposed. To solve this problem, we utilize an alternating optimization algorithm to optimize the precoding and alignment matrices. The simulation results demonstrate that the resultant SINR of the proposed method outperforms ZF and MMSE precoding algorithms.

翻译：本文研究了一种基于光学反射智能表面（ORIS）辅助的多用户可见光通信（VLC）系统。为最大化平均信干噪比（SINR）准则，我们联合设计了预编码矩阵与对齐矩阵。考虑到LED恒定平均传输功率以及所有用户功率的约束条件，提出了一种优化问题。为解决该问题，我们采用交替优化算法对预编码矩阵与对齐矩阵进行联合优化。仿真结果表明，所提方法获得的SINR性能优于ZF和MMSE预编码算法。