Reconfigurable Intelligent Surface Aided Integrated Communication and Localization with a Single Access Point
简介：Reconfigurable intelligent surfaces(RISs)not only assist communication but also help the local-ization of user equipment(UE).This study focuses on indoor localization of UE with a single access point(AP)and multiple RISs.First,we propose a two-stage channel estimation scheme where RIS phase shifts are tuned to obtain multiple channel soundings.In the first stage,the newtonized orthogonal matching pursuit al-gorithm extracts the parameters of multiple paths from the received signals.Then,the LOS path and RIS-reflected paths are identified.In the second stage,the estimated path gains of RIS-reflected paths with dif-ferent phase shifts are utilized to determine the angle of arrival(AOA)at the RIS by obtaining the angular pseudo spectrum.Consequently,by taking the AP and RISs as reference points,the linear least squares esti-mator can locate UE with the estimated AOAs.Simu-lation results show that the proposed algorithm can re-alize centimeter-level localization accuracy in the dis-cussed scenarios.Moreover,the higher accuracy of pseudo spectrum,a larger number of channel sound-ings,and a larger number of reference points can real-ize higher localization accuracy of UE.展开
学者：WangXiyuHuangYixuanYangJIEHANYuJinShi
关键词：Channel estimationIndoor localizationlinear least squarespseudo spectrumreconfigurable intelligent surface
在线出版日期：2026-03-17 （网站首发日期）
