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正交多用户CD-DCSK方案的设计及性能分析

贺利芳 董江涛 张刚

贺利芳, 董江涛, 张刚. 正交多用户CD-DCSK方案的设计及性能分析[J]. 电子与信息学报, 2022, 44(5): 1828-1838. doi: 10.11999/JEIT210263
引用本文: 贺利芳, 董江涛, 张刚. 正交多用户CD-DCSK方案的设计及性能分析[J]. 电子与信息学报, 2022, 44(5): 1828-1838. doi: 10.11999/JEIT210263
HE Lifang, DONG Jiangtao, ZHANG Gang. Design and Performance Analysis of Orthogonal Multi-User CD-DCSK Scheme[J]. Journal of Electronics & Information Technology, 2022, 44(5): 1828-1838. doi: 10.11999/JEIT210263
Citation: HE Lifang, DONG Jiangtao, ZHANG Gang. Design and Performance Analysis of Orthogonal Multi-User CD-DCSK Scheme[J]. Journal of Electronics & Information Technology, 2022, 44(5): 1828-1838. doi: 10.11999/JEIT210263

正交多用户CD-DCSK方案的设计及性能分析

doi: 10.11999/JEIT210263
基金项目: 国家自然科学基金(61771085),重庆市教育委员会科研项目(KJ1600407,KJQN201900601)
详细信息
    作者简介:

    贺利芳:女,1979年生,硕士,副教授,研究方向为混沌保密通信、微弱信号检测

    董江涛:男,1997年生,硕士生,研究方向为混沌保密通信

    张刚:男,1976年生,博士,教授,研究方向为混沌同步、混沌保密通信

    通讯作者:

    董江涛 598219244@qq.com

  • 中图分类号: TN911.3

Design and Performance Analysis of Orthogonal Multi-User CD-DCSK Scheme

Funds: The National Natural Science Foundation of China (61771085), The Research Project of Chongqing Educational Commission (KJ1600407, KJQN201900601)
  • 摘要: 为了进一步提升现有多用户混沌键控系统的信息传输速率和误码率(BER) 性能,该文提出一种正交多用户CD-DCSK(OMU-CD-DCSK)系统。该系统在差分混沌移位键控(DCSK)的基础上结合了相关延迟移位键控(CDSK),每个时隙中利用正交的Walsh码序列可以传输N bit的多用户信息,然后通过正交调制技术进一步提升传输速率。在接收端,采用滑动平均滤波器降低噪声方差,改善误码性能,之后进行相关解调即可恢复多用户信息比特。推导了多径瑞利衰落信道下系统的理论BER,并通过蒙特卡罗仿真实验进行了验证。此外,还定义了系统的综合效用,用于评估混沌系统的综合性能。与其他混沌键控系统相比,OMU-CD-DCSK的综合性能有明显优势,因此具有较好的实用价值。
  • 图  1  OMU-CD-DCSK系统发送端

    图  2  OMU-CD-DCSK系统接收端

    图  3  滑动平均滤波器原理

    图  4  多径瑞利衰落信道模型

    图  5  DCSK和OMU-CD-DCSK平方幅度谱

    图  6  不同扩频因子$ \beta $下系统BER曲线

    图  7  不同用户数N下系统BER曲线

    图  8  不同复制次数P下系统BER曲线

    图  9  P, $ \beta $和BER性能的3维关系图

    图  10  不同路径数L对系统BER曲线的影响

    图  11  不同系统之间BER比较

    图  12  不同系统的传输速率、能量效率比较

    图  13  不同系统的综合效用对比

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  • 被引次数: 0
出版历程
  • 收稿日期:  2021-03-30
  • 修回日期:  2021-11-11
  • 录用日期:  2021-11-11
  • 网络出版日期:  2021-12-22
  • 刊出日期:  2022-05-25

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