论文标题
CSI不完美的物联网系统中有限分辨率智能表面的控制和放置
Control and Placement of Finite-Resolution Intelligent Surfaces in IoT Systems with Imperfect CSI
论文作者
论文摘要
在本文中，我们研究了使用可重构智能表面（RISS）进行单输入单输出（SISO）分布式物联网（IoT）网络中的干扰抑制的优点。实施RIS辅助网络面临着各种问题，主要与RIS的控制和放置有关。为了应对与控制相关的挑战，我们考虑嘈杂和本地渠道知识，基于我们设计算法，以优化潜在的分布式RISS，以实现总体网络目标，例如总和结果。我们使用具有集中式RIS的网络作为我们的比较的基准。我们进一步假设RIS处的低位相位变速器以捕获现实世界的硬件限制。我们还研究了RIS的位置，并通过分析量化了RIS的最低控制程度，以保证特定网络性能指标并通过模拟验证结果。
In this paper, we study the advantages of using reconfigurable intelligent surfaces (RISs) for interference suppression in single-input single-output (SISO) distributed Internet of Things (IoT) networks. Implementing RIS-assisted networks confronts various problems, mostly related to the control and placement of the RIS. To tackle the control-related challenges, we consider noisy and local channel knowledge, based on which we devise algorithms to optimize the potentially distributed RISs to achieve an overall network objective, such as the sum-rate. We use a network with a centralized RIS as a benchmark for our comparisons. We further assume low-bit phase shifters at the RIS to capture real-world hardware limitations. We also study the placement of the RIS and analytically quantify the minimum required degrees-of-control for the RIS as a function of its location to guarantee a specific network performance metric and verify the results via simulations.
