可重构智能超表面在卫星导航系统中的应用展望  

Application prospects of reconfigurable intelligent surfaces in global navigation satellite systems

作　　者：张可 李井源[1] 刘增军[1] 黄新明[1] 倪少杰[1] ZHANG Ke;LI Jingyuan;LIU Zengjun;HUANG Xinming;NI Shaojie(College of Electronic Science and Technology,National University of Defense Technology/Key Laboratory of Satellite Navigation Technology,Changsha 410073,China)

机构地区：[1]国防科技大学电子科学学院/卫星导航技术重点实验室,长沙410073

出　　处：《导航定位学报》2024年第4期151-157,共7页Journal of Navigation and Positioning

基　　金：国家自然科学基金项目(U20A0193)。

摘　　要：高中低轨复杂大型星座是下一代全球卫星导航系统(GNSS)的发展方向,尤其是低轨卫星的大量部署,对卫星段和地面段的波束扫描天线在成本、重量及功耗等方面提出了更高要求,传统的电扫相控阵天线和机械扫描天线均无法较好地满足需求。近些年,可重构智能超表面(RIS)因其可低成本、低功耗地控制波束传播方向而被极大关注,并在下一代移动通信中被视为能够提升网络容量和覆盖范围的主要关键技术之一,利用RIS来解决卫星导航系统中的天线问题具有较大的潜力,但同时也面临诸多挑战。基于下一代卫星导航系统的发展需求,本文简要介绍了RIS的基本原理及目前的发展现状,重点分析了RIS在卫星导航系统中的应用前景,并提出了需要解决的核心关键技术。The complex large constellations in both high,medium,and low orbits are the development direction of the next generation of global navigation satellite system(GNSS),especially the large-scale deployment of low orbit satellites,which puts higher requirements on the cost,weight,and power consumption of beam scanning antennas in the space and ground segments of GNSS.However,traditional electric scanning phased array antennas and mechanical scanning antennas cannot meet these requirements well.In recent years,reconfigurable intelligent surface(RIS)has received great attention due to its ability to control the direction of beam propagation at low cost and power consumption,and is considered as one of the key technologies in the next generation of mobile communication to improve network capacity and coverage.Using RIS to solve antenna problems in satellite navigation systems has great potential,but it also faces many challenges.Based on the development needs of nextgeneration satellite navigation systems,this paper briefly introduced the basic principles and current development status of RIS,focused on analyzing the application prospects of RIS in satellite navigation systems,and proposed the core key technologies that should be addressed.

关 键 词：全球卫星导航系统(GNSS) 可重构智能超表面(RIS) 波束控制 信道测量 

分 类 号：TN927.21[电子电信—通信与信息系统]