A Cross-Layer Scheduling Method for Pipelined Layered Multi-Edge Type QC-LDPC Decoder With Better Conflict Resolution

IF 3.7 3区计算机科学 Q2 TELECOMMUNICATIONS

IEEE Communications Letters Pub Date : 2025-04-21 DOI:10.1109/LCOMM.2025.3562626

Dongxu Chang;Qingqing Peng;Guanghui Wang;Guiying Yan

引用次数: 0

Abstract

For multi-edge type quasi-cyclic low-density parity-check (MET-QC-LDPC) codes, the presence of common variable nodes shared between rows within a single layer poses great challenges for the hardware design of the decoder. In this study, a cross-layer update scheduling method for pipelined layered MET-QC-LDPC codes is proposed to achieve improved conflict resolution. Through a probabilistic analysis, we show that by pairing layers with relatively small common degrees and performing alternating updates between the paired layers, better conflict resolution can be achieved than the layer-by-layer updating approach. Experimental results demonstrate that, at medium to low code rates, 50% to 75% of memory conflicts can be mitigated through the proposed cross-layer scheduling compared to the layer-by-layer scheduling approach, without compromising decoding performance.

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一种具有较好冲突解决能力的流水线分层多边型QC-LDPC解码器的跨层调度方法

对于多边型准循环低密度奇偶校验码（MET-QC-LDPC）来说，单层码行之间存在共享的公共变量节点，这给解码器的硬件设计带来了很大的挑战。本文提出了一种管道分层MET-QC-LDPC码的跨层更新调度方法，以提高冲突解决能力。通过概率分析，我们表明，通过对具有相对较小公共度的层进行配对并在配对层之间进行交替更新，可以比逐层更新方法更好地解决冲突。实验结果表明，在中低码率下，与逐层调度方法相比，所提出的跨层调度方法可以缓解50% ~ 75%的内存冲突，而不会影响解码性能。

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.