Data-Interference Free and Low-Overhead Channel Estimation Framework for MIMO-OTFS System

IF 4.4 3区计算机科学 Q2 TELECOMMUNICATIONS

IEEE Communications Letters Pub Date : 2025-07-11 DOI:10.1109/LCOMM.2025.3588110

Ziyang Meng;Yu Zhang;Yiqing Zhou;Jinglin Shi

引用次数: 0

Abstract

In MIMO-OTFS systems, accurate CSI estimation with minimal pilot overhead is crucial. While guard-interval (GI)-based pilot patterns suppress data interference, they substantially increase overhead. To overcome this, we propose an interference-free, low-overhead channel estimation framework that exploits channel sparsity. Specifically, we introduce the delay-Doppler-angle basis expansion model (DDA-BEM) to reformulate the estimation task as a compressed sensing problem. Leveraging the sparsity in the DDA domain, we design a pilot pattern that inherently avoids data interference without requiring GIs. Simulation results demonstrate a 54% reduction in pilot overhead compared to state-of-the-art methods, while maintaining comparable estimation accuracy.

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MIMO-OTFS系统无数据干扰低开销信道估计框架

在MIMO-OTFS系统中，准确的CSI估计和最小的导频开销是至关重要的。虽然基于保护间隔（GI）的导频模式抑制了数据干扰，但它们大大增加了开销。为了克服这个问题，我们提出了一种利用信道稀疏性的无干扰、低开销的信道估计框架。具体来说，我们引入延迟-多普勒角基展开模型（DDA-BEM）将估计任务重新表述为压缩感知问题。利用DDA域中的稀疏性，我们设计了一个不需要GIs就能避免数据干扰的先导模式。仿真结果表明，与最先进的方法相比，该方法减少了54%的先导开销，同时保持了相当的估计精度。

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.