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.
作者
赵亚军
章嘉懿
艾渤
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)
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)。
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
smart high-speed railway
reconfigurable intelligent surface
Doppler frequency shift
penetration loss
train positioning
channel estimation
beamforming
