Performance Analysis of BEM-Based Channel Estimation for OTFS With Hardware Impairments

IF 3.7 3区计算机科学 Q2 TELECOMMUNICATIONS

IEEE Communications Letters Pub Date : 2025-03-23 DOI:10.1109/LCOMM.2025.3572905

Haowei Wu;Huanyu Chen;Qihao Peng;Qu Luo;Jinglan Ou

引用次数: 0

Abstract

This letter studies the low-complexity channel estimation for orthogonal time frequency space (OTFS) in the presence of hardware impairments. Firstly, to tackle the computational complexity of channel estimation, the basis expansion model (BEM) is utilized. Then, the mean square error (MSE) of the estimated channel is theoretically derived, revealing the effects of hardware impairments on channel estimation. Based on the estimated channel, the minimum mean square error (MMSE) detector is adopted to analyze the impacts of imperfect hardware on the bit error rate (BER). Finally, the numerical results validate the correctness of our theoretical analysis of the MSE for channel estimation and lower bound of the BER, and also demonstrate that even minor hardware impairments can significantly degrade the performance of the OTFS system.

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基于bem的OTFS信道估计性能分析

本文研究了存在硬件缺陷时正交时频空间（OTFS）的低复杂度信道估计。首先，利用基展开模型（BEM）解决信道估计的计算复杂度问题；然后，从理论上推导了信道估计的均方误差（MSE），揭示了硬件损伤对信道估计的影响。在估计信道的基础上，采用最小均方误差（MMSE）检测器分析硬件不完善对误码率的影响。最后，数值结果验证了我们对信道估计的MSE和误码率下界的理论分析的正确性，也证明了即使很小的硬件缺陷也会显著降低OTFS系统的性能。

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.