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智能超表面(Reconfigurable Intelligent Surface, RIS)作为一种变革性的技术，可通过智能重构无线环境提高无线信号的传输速率和可靠性。尽管现有文献对RIS辅助无线系统已开展了广泛的研究，但主要集中于仅由一个或多个RIS进行单次信号反射的无线通信系统。然而，在复杂环境中，单反射RIS链路往往容易受到环境中密集障碍物的阻挡，严重限制了无线覆盖范围。为此，现有文献提出了全新的协作式多RIS系统，其利用密集部署超表面形成的大量协作式反射视距(Line-of-Sight, LOS)链路，显著拓展了高频覆盖范围。然而，与传统单反射RIS系统相比，协作式多RIS系统在部署设计、性能优化以及信道获取等多个方面面临着全新挑战。为此，对当前协作式多RIS系统的相关研究成果进行系统性回顾，梳理其在部署策略、波束成形与路由、信道估计与性能分析等方面的最新进展，为该方向未来的研究提供重要参考。
Abstract：As a transformative technology, Reconfigurable Intelligent Surface(RIS) can intelligently reconfigure wireless environments to enhance the data rate and reliability of wireless signal transmission.Although extensive research has been conducted on RIS-assisted wireless systems in existing literature, early studies primarily focused on systems where signals are reflected once by a single or multiple RISs.However, in complex environments, single-reflection RIS links are often prone to blockage by dense obstacles, severely limiting wireless coverage.To address this challenge, recent studies have proposed a novel collaborative multi-RIS system that leverages densely deployed RISs to establish rich cooperatively reflected Line-of-Sight(LOS) links, significantly extending the high-frequency coverage range.However, compared to traditional single-reflection RIS systems, collaborative multi-RIS systems face new challenges in deployment design, performance optimization, and channel acquisition.This paper reviews recent advances in collaborative multi-RIS systems systematically, summarizing progress in deployment strategies, beamforming, and cooperative passive beam routing, channel estimation, and performance analysis, providing key references for future research in this field.
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基本信息:
中图分类号:TN92
引用信息:
[1]梅渭东,蒋宇航,王栋,等.协作式多智能超表面辅助的无线通信系统研究综述[J].无线电通信技术,2026,52(02):225-235.
基金信息:
四川省自然科学基金(2025ZNSFSC0514)~~
2026-01-27
2026-01-27
2026-01-27