[1]练秋芳,孙小芳,陈启望,等.双空间耦合LDPC码滑窗译码算法改进[J].华侨大学学报(自然科学版),2025,46(4):448-454.[doi:10.11830/ISSN.1000-5013.202412016]
　LIAN Qiufang,SUN Xiaofang,CHEN Qiwang,et al.Improvement of Sliding Window Decoding Algorithm for Double Spatially Coupled LDPC Codes[J].Journal of Huaqiao University(Natural Science),2025,46(4):448-454.[doi:10.11830/ISSN.1000-5013.202412016]
点击复制

双空间耦合LDPC码滑窗译码算法改进()
分享到：

《华侨大学学报（自然科学版）》[ISSN:1000-5013/CN:35-1079/N]

卷:
第46卷
期数:
2025年第4期
页码:
448-454
栏目:
出版日期:
2025-07-16

文章信息/Info

Title:
Improvement of Sliding Window Decoding Algorithm for Double Spatially Coupled LDPC Codes
文章编号:
1000-5013(2025)04-0448-07
作者:
练秋芳;  孙小芳;  陈启望;  鲁紫君;  周林
华侨大学 信息科学与工程学院, 福建 厦门 361021
Author(s):
LIAN Qiufang;  SUN Xiaofang;  CHEN Qiwang;  LU Zijun;  ZHOU Lin
College of Information Science and Engineering, Huaqiao University, Xiamen 361021, China
关键词:
联合信源信道编码;  双空间耦合低密度奇偶校验码;  滑窗译码算法;  监督
Keywords:
joint source-channel coding;  double spatially coupled LDPC code;  sliding window decoding algorithm;  supervision
分类号:
TN911.22
DOI:
10.11830/ISSN.1000-5013.202412016
文献标志码:
A
摘要:
针对基于联合信源信道编码系统的双空间耦合低密度奇偶校验(LDPC)码的译码性能优化问题,提出一种引入监督的滑窗译码算法。首先,在当前译码窗口内加入监督位;其次,监督位监视当前窗口内最可靠的对数似然值和最小平均错误概率,并将其分别放入存储器的对应位置中;然后,窗口内的码字进行下一轮迭代,直至满足译码迭代终止条件;最后,译码器根据存储的对数似然值估计译码结果。仿真结果表明:在加性高斯白噪声信道和瑞利衰落信道下,引入监督的滑窗译码算法性能在错误平层和瀑布区均有显著提升。
Abstract:
With regard to the decoding performance optimization issue of double spatially coupled low-density parity-check(LDPC)codes in a joint source-channel coding system, a supervised sliding-window decoding algorithm is proposed. First, supervisor bits are incorporated within the current decoding window. Then, the supervisor bits supervise the most reliable log-likelihood values and the minimum average error probabilities within the current window, they are placed into the corresponding positions in the memory, respectively. Next, the codewords within the window undergo the next round of iteration until the decoding termination conditions are met. Finally, the decoder estimates the decoding result based on the stored log-likelihood values. Simulation results show that under both additive Gaussian white noise and Rayleigh fading channels, the performance of the supervision sliding-window decoding algorithm is significantly improved in both the error floor and waterfall regions.

参考文献/References:

[1] SAYOOD K,BORKENHAGEN J C.Use of residual redundancy in the design of joint source/channel coders[J].IEEE Transactions on Communications,1991,39(6):838-846.DOI:10.1109/26.87173.
[2] HAGENAUER J.Source-controlled channel decoding[J].IEEE Transactions on Communications,1995,43(9):2449-2457.DOI:10.1109/26.412719.
[3] FRESIA M, PEREZ-CRUZ F, POOR H V. Optimized concatenated LDPC codes for joint source-channel coding[C]//IEEE International Symposium on Information Theory.Seoul:IEEE Press,2009:2131-2135.
[4] 王琳,刘三亚,陈辰,等.工业互联网低功耗数据链算法设计综述:联合信源信道编码设计的必要性、现实与前景[J].电子与信息学报,2020,42(1):249-262.DOI:10.11999/JEIT190762.
[5] FELSTROM A J,ZIGANGIROV K S.Time-varying periodic convolutional codes with low-density parity-check matrix[J].IEEE Transactions on Information Theory,1999,45(6):2181-2191.DOI:10.1109/18.782171.
[6] KUDEKAR S,RICHARDSON T J,URBANKE R L.Threshold saturation via spatial coupling: Why convolutional LDPC ensembles perform so well over the BEC[J].IEEE Transactions on Information Theory,2011,57(2):803-834.DOI:10.1109/TIT.2010.2095072.
[7] LENTMAIER M,SRIDHARAN A,COSTELLO D,et al.Iterative decoding threshold analysis for LDPC convolutional codes[J].IEEE Transactions on Information Theory,2010,56(10):5274-5289.DOI:10.1109/TIT.2010.2059490.
[8] IYENGAR A R,PAPALEO M,SIEGEL P H,et al.Windowed decoding of protograph-based LDPC convolutional codes over erasure channels[J].IEEE Transactions on Information Theory,2012,58(4):2303-2320.DOI:10.1109/TIT.2011.2177439.
[9] MO Shiyuan,CHEN Li.Improved sliding window decoding of spatially coupled low-density parity-check codes[C]//IEEE Information Theory Workshop.Taiwan:IEEE Press,2017:126-130.DOI:10.1109/ITW.2017.8277945.
[10] 张娅妹,周林,陈辰,等.窗口可变的空间耦合LDPC码滑窗译码算法[J].西安电子科技大学学报,2020,47(3):128-134.DOI:10.11999/JEIT190762.
[11] ALI I,KIM J H,KIM S H,et al.Improving windowed decoding of SC LDPC codes by effective decoding termination, message reuse, and amplification[J].IEEE Access,2018,6:9336-9346.DOI:10.1109/ACCESS.2017.2771375.
[12] GOLMOHAMMADI A,MITCHELL D G M.Concatenated spatially coupled LDPC codes with sliding window decoding for joint source-channel coding[J].IEEE Transactions on Communication,2022,70(2):851-864.DOI:10.1109/TCOMM.2021.3126750.
[13] LIAN Qiufang,CHEN Qiwang,ZHOU Lin,et al.Adaptive decoding algorithm with variable sliding window for double SC-LDPC coding system[J].IEEE Communications Letters,2023,27(2):404-408.DOI:10.1109/LCOMM.2022.3222560.
[14] DIVSALAR D,DOLINAR S,JONES C R,et al.Capacity approaching protograph codes[J].IEEE Journal on Selected Areas in Communications,2009,27(6):876-888.DOI:10.1109/JSAC.2009.090806.
[15] MITCHELL D G M,LENTMAIER M,COETELLO D J.Spatially coupled LDPC codes constructed fromprotographs[J].IEEE Transactions on Information Theory,2015,61(9):4866-4889.DOI:10.1109/TIT.2015.2453267.
[16] PUSANEA E,FELTSTROM A J,SRIDHARAN A,et al. Implementation aspects of LDPC convolutional codes[J].IEEE Transactions on Communications,2008,56(7):1060-1069.DOI:10.1109/TCOMM.2008.050519.

备注/Memo

备注/Memo:
收稿日期: 2024-12-12
通信作者: 练秋芳(1998-),女,助理实验师,主要从事联合信源信道编码的研究。E-mail:lianqiufang@hqu.edu.cn。
基金项目: 国家自然科学基金青年基金资助项目(62101195); 福建省科技计划项目(2024I0016)
更新日期/Last Update: 2025-07-20