Beam-Squint-Aware Channel Estimation for Dual-Wideband UPA-Type RIS-Aided Massive MIMO

IF 3.7 3区计算机科学 Q2 TELECOMMUNICATIONS

IEEE Communications Letters Pub Date : 2024-08-19 DOI:10.1109/LCOMM.2024.3446320

Hakan Ozen;Onur Yilmaz;Gokhan M. Guvensen

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引用次数: 0

Abstract

This letter presents a novel beam-squint-aware (BSA) channel estimation method for uniform planar array (UPA)-type reconfigurable intelligent surface (RIS)-aided frequency- and spatial-wideband (dual-wideband) massive multiple-input multiple-output (MIMO) systems. The proposed scheme considers the angles of arrival (AoAs), angles of departure (AoDs), and propagation delays as slowly-varying, while treating the channel gains as fast-varying parameters. To estimate these parameters, we divide the estimation procedure into slow-time parameter estimation (ST-PE) and fast-time parameter estimation (FT-PE) modes. During the ST-PE mode, we propose a BSA periodogram for estimating the AoAs at the base station (BS), followed by a BSA orthogonal matching pursuit (OMP) algorithm for estimating the cascaded angles and delays. In the FT-PE mode, we propose a subspace-aware least squares (SA-LS) method to estimate the channel gains. Simulation results demonstrate the superiority of the proposed estimation methods in terms of root mean square error (RMSE) and achievable rate metrics when compared to state-of-the-art approaches.

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双宽带 UPA 型 RIS 辅助大规模多输入多输出（MIMO）的波束-频谱感知信道估计

本文针对均匀平面阵列（UPA）型可重构智能表面（RIS）辅助频率和空间宽带（双宽带）大规模多输入多输出（MIMO）系统，提出了一种新颖的波束宽度感知（BSA）信道估计方法。所提出的方案将到达角（AoAs）、出发角（AoDs）和传播延迟视为缓慢变化的参数，而将信道增益视为快速变化的参数。为了估计这些参数，我们将估计过程分为慢时参数估计（ST-PE）和快时参数估计（FT-PE）模式。在慢时参数估计模式中，我们提出了一种用于估计基站（BS）AoAs 的 BSA 周期图，随后又提出了一种用于估计级联角度和延迟的 BSA 正交匹配追求（OMP）算法。在 FT-PE 模式下，我们提出了一种子空间感知最小二乘法（SA-LS）来估计信道增益。仿真结果表明，与最先进的方法相比，所提出的估计方法在均方根误差（RMSE）和可实现速率指标方面更具优势。

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.