智能超表面技术在智能高铁通信场景的应用探讨  

Applications of Reconfigurable Intelligent Surface in Smart High-Speed Railway Communications

作　　者：赵亚军 章嘉懿[3] 艾渤[3] ZHAO Yajun;ZHANG Jiayi;AI Bo(State Key Laboratory of Mobile Network and Mobile Multimedia Technology,Shenzhen 518057,China;ZTE Corporation,Shenzhen 518057,China;State Key Lab of Rail Traffic Control&Safety,Beijing Jiaotong University,Beijing 100044,China)

机构地区：[1]移动网络和移动多媒体技术国家重点实验室,深圳518057 [2]中兴通讯股份有限公司,深圳518057 [3]北京交通大学轨道交通控制与安全国家重点实验室,北京100044

出　　处：《中兴通讯技术》2021年第4期36-43,共8页ZTE Technology Journal

基　　金：国家重点研发计划(2020YFB1807600)。

摘　　要：作为最具发展潜力的5G-Adv和6G关键技术之一,智能超表面(RIS)技术具有低成本、低复杂度和易于部署等特点,为智能高铁通信的发展提供了新契机。介绍了RIS辅助的智能高铁通信的典型应用,包括抑制多普勒频移效应、解决频繁切换问题、克服高穿透损耗问题和支持高精度列车定位。深入讨论了RIS辅助的智能高铁通信中的关键技术,包括信道测量与建模、信道估计与反馈、波束赋形、网络架构与部署。认为智能高铁新基建与RIS构建的电磁新基建的结合,将会给智能高铁带来广阔的前景。Reconfigurable intelligent surface(RIS)is one of the most promising technologies for 5 G-Adv and 6 G.It has the characteristics of low cost,low complexity,and easy deployment,which provides a new opportunity to develop intelligent high-speed railway communications.The typical applications of RIS-assisted smart high-speed railway communications are introduced in detail,including suppressing the Doppler shift effect,solving frequent handoff problems,overcoming high penetration loss problems,and supporting high-precision train positioning.The key technologies of RIS-assisted smart high-speed railway communications are discussed in-depth,including channel measurement and modeling,channel estimation and feedback,beamforming,network architecture,and network deployment.It is believed that the combination of the new intelligent high-speed railway infrastructure and the new electromagnetic infrastructure built by RIS will bring broad industrial prospects to the intelligent high-speed railway in the future.

关 键 词：智能高铁 智能超表面 多普勒频移 穿透损耗 列车定位 信道估计 波束赋形 

分 类 号：U285.2[交通运输工程—交通信息工程及控制] TN929.5[交通运输工程—道路与铁道工程]