Guilu Wu;Han Chen;Xiangshuo Zhao;Haoyu Liu;Junkang You
{"title":"Accuracy Estimation of Multi-RISs Assisted Positioning in Indoor UWB System","authors":"Guilu Wu;Han Chen;Xiangshuo Zhao;Haoyu Liu;Junkang You","doi":"10.1109/LWC.2024.3521087","DOIUrl":null,"url":null,"abstract":"Reconfigurable intelligent surfaces (RISs) can create additional reflection paths between the transmitter and the receiver. It can be leveraged to enhance indoor positioning accuracy. This letter analyzes the Cramér-Rao lower bound (CRLB) for position estimation by utilizing RISs in the ultra-wideband (UWB) system. Then, an optimization scheme for RIS phase shifts is proposed to further improve positioning accuracy. Initially, the channel parameters at the receiver are estimated. And a weighted least squares (WLS) positioning method is proposed to fuse the estimates of the reflection paths from multiple RISs. Simulation results confirm that the proposed method enhances positioning accuracy to approximately the CRLB in indoor wireless environments.","PeriodicalId":13343,"journal":{"name":"IEEE Wireless Communications Letters","volume":"14 3","pages":"721-725"},"PeriodicalIF":5.5000,"publicationDate":"2024-12-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"IEEE Wireless Communications Letters","FirstCategoryId":"94","ListUrlMain":"https://ieeexplore.ieee.org/document/10811990/","RegionNum":3,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"COMPUTER SCIENCE, INFORMATION SYSTEMS","Score":null,"Total":0}
引用次数: 0
Abstract
Reconfigurable intelligent surfaces (RISs) can create additional reflection paths between the transmitter and the receiver. It can be leveraged to enhance indoor positioning accuracy. This letter analyzes the Cramér-Rao lower bound (CRLB) for position estimation by utilizing RISs in the ultra-wideband (UWB) system. Then, an optimization scheme for RIS phase shifts is proposed to further improve positioning accuracy. Initially, the channel parameters at the receiver are estimated. And a weighted least squares (WLS) positioning method is proposed to fuse the estimates of the reflection paths from multiple RISs. Simulation results confirm that the proposed method enhances positioning accuracy to approximately the CRLB in indoor wireless environments.
期刊介绍：
IEEE Wireless Communications Letters publishes short papers in a rapid publication cycle on advances in the state-of-the-art of wireless communications. Both theoretical contributions (including new techniques, concepts, and analyses) and practical contributions (including system experiments and prototypes, and new applications) are encouraged. This journal focuses on the physical layer and the link layer of wireless communication systems.
京公网安备 11010802042870号
京ICP备2023020795号-1
分享
求助内容：
应助结果提醒方式：
扫码关注我们
