Decoding-Aided Channel Estimation Based on the GC-LDPC Codes in Time-Varying MIMO Systems

IF 4.4 3区计算机科学 Q2 TELECOMMUNICATIONS

IEEE Communications Letters Pub Date : 2025-08-19 DOI:10.1109/LCOMM.2025.3600544

Hongmei Kang;Lin Zhao;Ming Jiang;Chunming Zhao

引用次数: 0

Abstract

Massive multiple-input multiple-output (MIMO) has been widely adopted in next-generation wireless systems to enhance spectral efficiency and reliability. However, channel aging poses a significant challenge, leading to the outdated channel state information and degraded system performance. To address this issue, we propose a decoding-aided Kalman filter channel tracking algorithm based on the globally-coupled low-density parity-check (GC-LDPC) codes. The proposed approach leverages locally decoded symbols to optimize channel estimation and employs global decoding to further reduce the error floor. Additionally, protograph-based extrinsic information transfer analysis and the error minimization progressive edge-growth algorithm are utilized to optimize the compatible GC-LDPC codes. Simulation results demonstrate that the proposed algorithm significantly improves channel tracking performance in time-varying MIMO systems.

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时变MIMO系统中基于GC-LDPC码的解码辅助信道估计

大规模多输入多输出（MIMO）技术被广泛应用于下一代无线系统中，以提高频谱效率和可靠性。然而，信道老化带来了巨大的挑战，导致信道状态信息过时，系统性能下降。为了解决这个问题，我们提出了一种基于全局耦合低密度奇偶校验（GC-LDPC）码的解码辅助卡尔曼滤波信道跟踪算法。该方法利用局部译码符号优化信道估计，并采用全局译码进一步降低误差层。此外，利用基于原型的外部信息传递分析和误差最小化渐进式边缘生长算法对兼容的GC-LDPC码进行了优化。仿真结果表明，该算法显著提高了时变MIMO系统的信道跟踪性能。

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.