论文标题
两次计算传输设计和RIS优化用于集成本地化和通信
Two-Timescale Transmission Design and RIS Optimization for Integrated Localization and Communications
论文作者
论文摘要
可重新配置的智能表面（RISS）具有提高通信性能的巨大潜力，尤其是当用户设备（UE）和基站（BS）之间的视线（LOS）路径被阻止时。为了控制RIS，需要渠道状态信息（CSI），这需要大量的飞行员开销。为了减少此开销和频繁的RIS重新配置的需求，我们为集成定位和通信提供了一个新颖的框架，其中RIS配置在位置相干间隔期间固定，而BS预编码器则优化了每个通道相干间隔。该框架利用借助几个RIS以及新颖的RIS优化和通道估计方法获得的准确位置信息。在本地化精度，通道估计误差和可实现的速率方面的性能证明了所提出的方法的有效性。
Reconfigurable intelligent surfaces (RISs) have tremendous potential to boost communication performance, especially when the line-of-sight (LOS) path between the user equipment (UE) and base station (BS) is blocked. To control the RIS, channel state information (CSI) is needed, which entails significant pilot overhead. To reduce this overhead and the need for frequent RIS reconfiguration, we propose a novel framework for integrated localization and communications, where RIS configurations are fixed during location coherence intervals, while BS precoders are optimized every channel coherence interval. This framework leverages accurate location information obtained with the aid of several RISs as well as novel RIS optimization and channel estimation methods. Performance in terms of localization accuracy, channel estimation error, and achievable rate demonstrates the effectiveness of the proposed approach.
