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差分混沌通信研究综述:信号设计与性能优化

蔡相明 徐位凯 王琳

蔡相明, 徐位凯, 王琳. 差分混沌通信研究综述:信号设计与性能优化[J]. 电子与信息学报, 2022, 44(10): 3683-3696. doi: 10.11999/JEIT220625
引用本文: 蔡相明, 徐位凯, 王琳. 差分混沌通信研究综述:信号设计与性能优化[J]. 电子与信息学报, 2022, 44(10): 3683-3696. doi: 10.11999/JEIT220625
CAI Xiangming, XU Weikai, WANG Lin. Survey of Differential Chaotic Communications: Signal Design and Performance Optimization[J]. Journal of Electronics & Information Technology, 2022, 44(10): 3683-3696. doi: 10.11999/JEIT220625
Citation: CAI Xiangming, XU Weikai, WANG Lin. Survey of Differential Chaotic Communications: Signal Design and Performance Optimization[J]. Journal of Electronics & Information Technology, 2022, 44(10): 3683-3696. doi: 10.11999/JEIT220625

差分混沌通信研究综述:信号设计与性能优化

doi: 10.11999/JEIT220625
基金项目: 国家自然科学基金(61871337, 61671395)
详细信息
    作者简介:

    蔡相明:男,博士,研究方向为宽带无线通信

    徐位凯:男,副教授,研究方向为宽带无线通信

    王琳:男,教授,研究方向为宽带无线通信、信息论与编码

    通讯作者:

    徐位凯 xweikai@xmu.edu.cn

  • 中图分类号: TN914.3

Survey of Differential Chaotic Communications: Signal Design and Performance Optimization

Funds: The National Natural Science Foundation of China (61871337, 61671395)
  • 摘要: 作为一种低复杂度的非相干信息传输方案,差分混沌通信系统以其良好的抗多径衰落性能而受到广泛关注。近年来,研究者围绕着以差分混沌移位键控(DCSK)为代表的差分混沌通信开展了一系列富有成效的研究,逐渐发展了差分混沌通信的信号设计与性能优化方法。为此,该文从信号帧结构设计、正交多级信号设计、信号星座图设计和多载波信号设计4个层面详细综述了差分混沌通信信号设计的主要研究进展。此外,该文重点总结了面向差分混沌通信的噪声抑制辅助性能优化、索引调制辅助性能优化和混沌成形滤波辅助性能优化等方面的研究工作。
  • 图  1  差分混沌通信形成的重要时间节点

    图  2  差分混沌移位键控系统的结构

    图  3  差分混沌通信的信号设计方案

    图  4  不同域索引辅助差分混沌通信的性能优化

    表  1  差分混沌通信不同信号设计的对比

    信号设计方法优势劣势
    信号帧结构设计实现简单,硬件成本较低多径时延较大时将导致信号间干扰增大
    正交多级信号设计参考信号和信息承载信号在相同时隙中传输,提高系统的频谱效率接收端需要Walsh码同步,误码率性能与同步质量密切相关
    信号星座图设计一个多元传输符号可传输多个信息比特,提高系统的数据传输速率误码率性能随数据传输速率增大而恶化
    多载波信号设计多个信息承载信号子载波共享一个参考信号,提高系统的能量效率峰均功率比较大,影响系统总体性能
    下载: 导出CSV

    表  2  不同噪声抑制方案的对比

    噪声抑制方案基本原理优势劣势
    NR-DCSK [59]
    SA-MC-DCSK [60]
    利用冗余信息进行平滑滤波降噪系统实现相对简单,硬件成本较低引入冗余信息,降低系统的能量效率和频谱效率
    ND-MDCSK-DHT [62]利用信息比特的再调制和迭代算法降噪能够估计出噪声强度且降噪性能良好系统复杂度高,高阶调制下的噪声抑制效果差
    MC-DCSK-IR [63]
    NS-MC-MDCSK [64]
    利用传输信号的似然信息实现迭代降噪少量迭代就能获得良好的误码率性能载波同步要求精度高,其质量直接影响系统性能
    LRAM-MC-DCSK [65]
    I-OFDM-DCSK [66]
    利用传输信号矩阵的低秩特性实现降噪能够大幅度地提高系统的误码率性能接收端需要额外的信号处理电路,系统复杂度高
    下载: 导出CSV
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出版历程
  • 收稿日期:  2022-05-17
  • 修回日期:  2022-07-25
  • 录用日期:  2022-08-02
  • 网络出版日期:  2022-08-04
  • 刊出日期:  2022-10-19

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