Enhancing Near-Field Wireless Localization With LiDAR-Assisted RIS in Multipath Environments

IF 4.6 3区计算机科学 Q1 COMPUTER SCIENCE, INFORMATION SYSTEMS

IEEE Wireless Communications Letters Pub Date : 2023-09-04 DOI:10.1109/LWC.2023.3311730

Omar Rinch;Ahmed Elzanaty;Ahmad Alsharoa

引用次数: 0

Abstract

In next-generation wireless networks that adopt millimeter-waves and large reconfigurable intelligent surfaces (RISs), the user is expected to be in the near-field region, where the widely adopted far-field algorithms based on far-field can yield low positioning accuracy. Also, the localization of user equipment (UE) becomes more challenging in multipath environments. In this letter, we propose a localization algorithm for a UE in the near-field of a RIS in multipath environments. The proposed scheme utilizes a light detection and ranging (LiDAR) to assist the UE positioning by providing geometric information about some of the scatterers in the environment. This information is fed to a sparse recovery algorithm to improve the localization accuracy of the UE by reducing the number of variables (i.e., angle of arrivals and distances) to be estimated. The numerical results show that the proposed scheme can improve the localization accuracy by 65% compared to the standard compressed sensing (CS) scheme.

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利用多径环境中的激光雷达辅助 RIS 增强近场无线定位功能

在采用毫米波和大型可重构智能表面（RIS）的下一代无线网络中，用户预计将处于近场区域，而广泛采用的基于远场的远场算法定位精度较低。此外，在多径环境中，用户设备（UE）的定位变得更具挑战性。在这封信中，我们提出了一种多径环境下 RIS 近场 UE 的定位算法。所提方案利用光探测和测距（LiDAR），通过提供环境中一些散射体的几何信息来协助 UE 定位。这些信息被输入稀疏恢复算法，通过减少需要估计的变量数量（即到达角和距离）来提高 UE 的定位精度。数值结果表明，与标准压缩传感（CS）方案相比，拟议方案可将定位精度提高 65%。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

IEEE Wireless Communications Letters Engineering-Electrical and Electronic Engineering

CiteScore

12.30

自引率

6.30%

发文量

481

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.