User Localization for Reconfigurable Intelligent Surface-Assisted mmWave MIMO-OFDM Systems

IF 3.7 3区计算机科学 Q2 TELECOMMUNICATIONS

IEEE Communications Letters Pub Date : 2024-12-02 DOI:10.1109/LCOMM.2024.3509621

Menglei Sheng;Youming Li;Wanyuan Cai;Qinke Qi;Zhenqian Wu;Yonghong Wu

引用次数: 0

Abstract

We discuss the user localization problem assisted by reconfigurable intelligent surfaces (RIS) in millimeter-wave (mmWave) multiple-input multiple-output (MIMO) orthogonal frequency division multiplexing (OFDM) systems. By exploring the inherent sparse scattering characteristics of mmWave channels, we propose a tensor decomposition based method to obtain the channel parameters (i.e. angle, delay) required for user localization. Specifically, the received signal is modeled as a low-rank third-order tensor fitting a typical polyhedral model which contains a factor matrix of channel parameters. Then, we design a structured tensor decomposition method to estimate the channel parameters by using the Vandermonde property of factor matrices. Finally, based on the least squares criterion, the location of user are obtained from the estimated channel parameters. Simulation results show that the proposed estimation scheme can achieve a centimeter-level resolution of user localization.

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可重构智能表面辅助毫米波MIMO-OFDM系统的用户定位

讨论了毫米波（mmWave）多输入多输出（MIMO）正交频分复用（OFDM）系统中可重构智能曲面（RIS）辅助下的用户定位问题。通过探索毫米波信道固有的稀疏散射特性，提出了一种基于张量分解的方法来获取用户定位所需的信道参数（即角度、时延）。具体而言，将接收到的信号建模为一个低秩三阶张量，拟合一个包含信道参数因子矩阵的典型多面体模型。然后，利用因子矩阵的Vandermonde性质，设计了一种结构化张量分解方法来估计信道参数。最后，根据最小二乘准则，从估计的信道参数中得到用户的位置。仿真结果表明，该估计方案可以实现厘米级的用户定位分辨率。

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 Communications Letters 工程技术-电信学

CiteScore

8.10

自引率

7.30%

发文量

590

审稿时长

2.8 months

期刊介绍： The IEEE Communications Letters publishes short papers in a rapid publication cycle on advances in the state-of-the-art of communication over different media and channels including wire, underground, waveguide, optical fiber, and storage channels. 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 communication systems.