一种基于RIS的宽带毫米波SISO定位方法  

An RIS assisted Wideband Millimeter Wave SISO-Based Positioning Method

作　　者：孙俊倡 谷荣妍 马帅 柴进晋 李世银 SUN Junchang;GU Rongyan;MA Shuai;CHAI Jinjin;LI Shiyin(School of Information and Control Engineering,China University of Mining and Technology,Xuzhou 221116,China;Peng Cheng Laboratory,Shenzhen 518055,China;School of Air Defence and Antimissile,Air Force Engineering University,Xi’an 710038,China)

机构地区：[1]中国矿业大学信息与控制工程学院,徐州221116 [2]鹏城实验室,深圳518055 [3]空军工程大学防空反导学院,西安710038

出　　处：《电子与信息学报》2024年第4期1240-1246,共7页Journal of Electronics & Information Technology

基　　金：国家自然科学基金(61771474,62371451)。

摘　　要：针对毫米波定位过程中空间宽带效应产生的影响,该文基于可重构智能超表面(RIS)和单输入单输出(SISO)毫米波系统提出一种新颖的3维(3D)定位估计方法。首先,通过设计RIS相位,利用快速傅里叶逆变换(IFFT)粗略地估计直射路径的视距(LoS)时延、RIS路径的虚拟视距(VLoS)时延以及RIS与用户之间的出发角(AoD)等信道参数。然后,利用拟牛顿法修正上述参数进而估计用户的位置坐标。通过仿真模拟对比了所提宽带估计方法和传统的窄带估计方法的定位性能,结果表明,通过考虑空间宽带效应,带宽为240 MHz时定位精度大约可提高10%,随着带宽增大超过800 MHz时定位性能可提高超过20%。For the effects of spatial-wideband effects during millimeter wave positioning,a novel 3-Dimensional(3D)positioning estimation method based on Reconfigurable Intelligent Surface(RIS)and Single Input Single Output(SISO)millimeter wave system is proposed.First,by designing the RIS phase profiles,the channel parameters of the direct Line-of-Sight(LoS)delay,the RIS-aided Virtual Line-of-Sight(VLoS)delay,and the Angle-of-Departure(AoD)between the RIS and the user are coarsely estimated based on the Inverse Fast Fourier Transform(IFFT).Then,the quasi-Newton method is used to refine these parameters and to estimate the location of the user.Simulations are conducted to compare the positioning performance of the proposed spatial-wideband estimation method with that of the traditional narrowband estimation method.The results show that by taking into account the spatial-wideband effects,the positioning accuracy can be improved by approximately 10%for a bandwidth of 480 MHz and by more than 20%as the bandwidth increases beyond 800 MHz.

关 键 词：毫米波定位 空间宽带效应 可重构智能超表面 单站定位 

分 类 号：TN929.5[电子电信—通信与信息系统]