欢迎访问《空军工程大学学报》官方网站!

咨询热线:029-84786242 RSS EMAIL-ALERT
基于窗口扩展的空间耦合LDPC码滑窗译码算法设计
DOI:
作者:
作者单位:

作者简介:

通讯作者:

中图分类号:

TN92;TD655

基金项目:

国家自然科学基金联合基金重点项目(U19B2015)


A Sliding Window Decoding Algorithm Based on Window Extension for Spatially Coupled LDPC Codes
Author:
Affiliation:

Fund Project:

  • 摘要
  • |
  • 图/表
  • |
  • 访问统计
  • |
  • 参考文献
  • |
  • 相似文献
  • |
  • 引证文献
  • |
  • 资源附件
  • |
  • 文章评论
    摘要:

    针对传统的空间耦合LDPC(SC-LDPC)码滑窗译码算法由于窗口截断导致性能损失的问题,提出了一种基于窗口扩展的SC-LDPC码滑窗译码算法来提高窗口内信息可靠性,从而提升滑窗译码算法性能。并在此基础上,提出了一种低时延的提前终止窗口滑动策略,减少窗口滑动次数,实现译码性能和译码时延的有效折中。仿真结果表明,相较于传统滑窗译码算法,所提出的基于窗口扩展的滑窗译码算法的译码性能在窗口尺寸较小时,性能增益约为1.8 dB,随着窗口尺寸的增大,尽管性能增益逐渐减小,但仍优于传统滑窗译码算法,接近于次最优的置信传播译码算法。还推导了译码复杂度计算表达式和译码时延表达式。分析结果表明,相较于传统滑窗译码算法,尽管窗口扩展带来的单个窗口内校验节点数目的少量增加导致了单个窗口内译码复杂度有所增高,但由于减少了窗口滑动次数,因此整体译码复杂度与传统滑窗译码算法基本一致,且译码时延得到显著降低。

    Abstract:

    In view of the truncated window causing the performance loss by the conventional sliding window decoding (SWD) algorithm to spatially coupled LDPC (SC-LDPC) codes, a SWD algorithm is proposed based on window extension (ESWD) in this paper to improve the reliabilities of the information in the decoding window, upgrading further the whole decoding performances. On this basis, a low latency with early termination window sliding scheme is proposed to reduce the number of sliding, realizing the good trade-off between the decoding performance and decoding latency. The simulation results show that the proposed ESWD algorithm has about 1.8 dB gain with decoding window size being small, compared with the conventional SWD algorithm. And with the increment of window size, though the performance gain decreases gradually, the performance is still superior to that of the sliding window decoding algorism at close decoding performance of the sub-optimal belief propagation algorithm. Moreover, the decoding complexity and latency expressions are also derived. The analysis results show that compared with the conventional SWD algorithm, although the slight increase of the decoding complexity in one decoding window is resulted by the additional few check nodes due to the window extension in the proposed ESWD algorithm, the whole decoding complexity keeps almost the same with the conventional SWD algorithm and the decoding latency is significantly reduced.

    参考文献
    相似文献
    引证文献
引用本文

刘洋, 钱燕芝, 王希阳, 孙莎.基于窗口扩展的空间耦合LDPC码滑窗译码算法设计[J].空军工程大学学报,2025,26(3):112-118

复制
分享
文章指标
  • 点击次数:
  • 下载次数:
  • HTML阅读次数:
  • 引用次数:
历史
  • 收稿日期:
  • 最后修改日期:
  • 录用日期:
  • 在线发布日期: 2025-06-04
  • 出版日期: