A Pseudo-Inverse-Based Hard Thresholding and PSO-Aided Channel Estimation for mmWave MIMO Systems

IF 3.7 3区计算机科学 Q2 TELECOMMUNICATIONS

IEEE Communications Letters Pub Date : 2025-03-23 DOI:10.1109/LCOMM.2025.3572984

Poornima Sriramula;L. Nirmala Devi

引用次数: 0

Abstract

Accurate channel estimation is essential for enabling reliable communication in millimeter-wave (mmWave) multiple input multiple output (MIMO) systems. This letter presents a novel approach that combines pseudo-inverse-based hard thresholding (PIHT) with particle swarm optimization (PSO) to enhance the accuracy of channel estimation. The proposed method capitalizes on the faster ability of PIHT to recover sparse channel coefficients with low computational complexity as the initial stage for coarse channel estimation, followed by refinement of the channel estimates using the PSO technique. Through both computational complexity analysis and extensive simulations, the effectiveness of the combined approach is evaluated, demonstrating its potential to improve the accuracy of mmWave massive MIMO channel estimation. It is observed that at lower SNR the presented method is able to achieve reliable channel estimation.

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基于伪逆的硬阈值和pso辅助的毫米波MIMO系统信道估计

精确的信道估计对于实现毫米波（mmWave）多输入多输出（MIMO）系统的可靠通信至关重要。本文提出了一种结合伪逆硬阈值（PIHT）和粒子群优化（PSO）来提高信道估计精度的新方法。该方法利用PIHT快速恢复计算复杂度较低的稀疏信道系数的能力，作为粗信道估计的初始阶段，然后使用PSO技术对信道估计进行细化。通过计算复杂度分析和广泛的仿真，评估了组合方法的有效性，证明了其提高毫米波大规模MIMO信道估计精度的潜力。实验结果表明，在较低信噪比下，该方法能够实现可靠的信道估计。

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.