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非平稳信道下LDPC码低复杂度滑窗置信传播联合信道估计与译码算法

杨洋 方勇 单博炜

杨洋, 方勇, 单博炜. 非平稳信道下LDPC码低复杂度滑窗置信传播联合信道估计与译码算法[J]. 电子与信息学报, 2021, 43(1): 68-76. doi: 10.11999/JEIT200406
引用本文: 杨洋, 方勇, 单博炜. 非平稳信道下LDPC码低复杂度滑窗置信传播联合信道估计与译码算法[J]. 电子与信息学报, 2021, 43(1): 68-76. doi: 10.11999/JEIT200406
Yang YANG, Yong FANG, Bowei SHAN. Low-complexity Joint Channel Estimation and Decoding for LDPC Codes Via Sliding-Window Belief-Propagation over Non-stationary Channels[J]. Journal of Electronics & Information Technology, 2021, 43(1): 68-76. doi: 10.11999/JEIT200406
Citation: Yang YANG, Yong FANG, Bowei SHAN. Low-complexity Joint Channel Estimation and Decoding for LDPC Codes Via Sliding-Window Belief-Propagation over Non-stationary Channels[J]. Journal of Electronics & Information Technology, 2021, 43(1): 68-76. doi: 10.11999/JEIT200406

非平稳信道下LDPC码低复杂度滑窗置信传播联合信道估计与译码算法

doi: 10.11999/JEIT200406
基金项目: 省级大学生创新创业训练计划项目(S202010710404)
详细信息
    作者简介:

    杨洋:男,1981年生,讲师,研究方向为信道编码、无线通信

    方勇:男,1979年生,教授,研究方向为信息论、信源编码、信道编码、图像处理

    单博炜:男,1978年生,讲师,研究方向为模式识别、深度学习、图像处理

    通讯作者:

    方勇 fy@chd.edu.cn

  • 中图分类号: TN911.22

Low-complexity Joint Channel Estimation and Decoding for LDPC Codes Via Sliding-Window Belief-Propagation over Non-stationary Channels

Funds: The Provincial Undergraduate Training Program on Innovation and Entrepreneurship (S202010710404)
  • 摘要: 随着移动通信应用场景的持续增多,非平稳信道成为越来越常见的传输环境,而非平稳信道下的可靠传输依赖于准确的信道估计。基于信源编码中用于信源参数估计和信源相关性估计的滑窗置信传播(SWBP)算法,该文提出一种非平稳信道下LDPC码的联合信道估计与译码(JCED)算法;同时,分别基于交叉熵和离散傅里叶变换提出两种在每轮JCED迭代中自适应设置滑窗长度的快速算法。仿真结果表明,在无导频辅助的前提下,所提算法具有接近理想信道估计下置信传播译码的性能以及高效率、低复杂度、强鲁棒性和不导致错误平层等优点。
  • 图  1  多种滑窗长度设置方法下的算法BER性能

    图  2  多种滑窗长度设置方法下的算法平均迭代次数

    图  3  多种滑窗长度设置方法下的算法相对时间复杂度

    图  4  不同局部噪声方差初始估计值下的算法BER性能

    图  5  不同局部噪声方差初始估计值下的算法平均迭代次数

    图  6  相同码率,不同码长的码在所提JCED算法下的BER性能

    图  7  相同码长,不同码率的码在所提JCED算法下的BER性能

    图  8  相同码长的规则与非规则码在所提JCED算法下的BER性能

    图  9  所提JCED算法的错误平层验证

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出版历程
  • 收稿日期:  2020-05-26
  • 修回日期:  2020-09-30
  • 网络出版日期:  2020-10-16
  • 刊出日期:  2021-01-15

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