针对可重构智能表面(Reconfigurable Intelligent Surface,RIS)辅助无线通信系统存在"双衰落效应"问题,提出了一种RIS位置部署优化方法.建立了符合实际应用场景的RIS辅助无线通信系统模型,该模型考虑RIS可部署在三维空间中任意位置.以最大化用户接收信噪比(Signal to Noise Ratio,SNR)为目标,通过数值分析三维空间中基站、RIS和用户之间的相对位置关系,理论推导出RIS最优部署位置的闭式解.仿真实验结果表明,将RIS部署在通过数值分析方法获取的最优位置处,提高了实际应用场景下RIS辅助无线通信系统中的用户接收SNR.
Research on RIS Location Deployment in Three-dimensional Space for Communication SNR Enhancement
To deal with the problem of"double fading effect"in Reconfigurable Intelligent Surface(RIS)assisted wireless communication system,an optimization method of RIS location deployment is proposed.A model of RIS-assisted wireless communication system is established in accordance with the practical application scenario,which considers that the RIS can be deployed at any location in the three-dimensional space.With the objective of maximizing the user-received Signal to Noise Ratio(SNR),the closed-form solution for the optimal deployment location of RIS is theoretically derived by numerically analyzing the relative position relationship among the base station,the RIS and the user in the three-dimensional space.The results of simulation experiments show that deploying the RIS at the optimal location obtained by the numerical analysis method improves the user-received SNR for the RIS-assisted wireless communication system in practical application scenarios.
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