标题： 物联网系统中有限分辨率智能表面的控制与部署，具有不完美信道状态信息 显示英文标题

标题： Control and Placement of Finite-Resolution Intelligent Surfaces in IoT Systems with Imperfect CSI

摘要： 在本文中，我们研究了在单输入单输出（SISO）分布式物联网（IoT）网络中使用可重构智能表面（RISs）进行干扰抑制的优势。 实施RIS辅助的网络面临各种问题，主要与RIS的控制和放置有关。 为了解决与控制相关的问题，我们考虑了噪声和局部信道知识，并在此基础上设计算法，以优化可能分布的RISs，以实现总体网络目标，例如总速率。 我们使用一个具有集中式RIS的网络作为比较基准。 我们进一步假设RIS上使用低比特相移器，以捕捉现实世界的硬件限制。 我们还研究了RIS的放置，并分析量化了RIS所需的最小控制度作为其位置的函数，以保证特定的网络性能指标，并通过仿真验证了结果。 显示英文摘要

摘要： 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.