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正交多用户短参考高速差分混沌键控通信系统

张刚 许可蓉 贺利芳

张刚, 许可蓉, 贺利芳. 正交多用户短参考高速差分混沌键控通信系统[J]. 电子与信息学报, 2021, 43(11): 3131-3140. doi: 10.11999/JEIT200739
引用本文: 张刚, 许可蓉, 贺利芳. 正交多用户短参考高速差分混沌键控通信系统[J]. 电子与信息学报, 2021, 43(11): 3131-3140. doi: 10.11999/JEIT200739
Gang ZHANG, Kerong XU, Lifang He. Orthogonal Multiuser Short Reference High Rate Differential Chaos Shift Keying Communication System[J]. Journal of Electronics & Information Technology, 2021, 43(11): 3131-3140. doi: 10.11999/JEIT200739
Citation: Gang ZHANG, Kerong XU, Lifang He. Orthogonal Multiuser Short Reference High Rate Differential Chaos Shift Keying Communication System[J]. Journal of Electronics & Information Technology, 2021, 43(11): 3131-3140. doi: 10.11999/JEIT200739

正交多用户短参考高速差分混沌键控通信系统

doi: 10.11999/JEIT200739
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:

    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

    许可蓉:女,1997年生,硕士生,研究方向为混沌保密通信

    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

    通讯作者:

    许可蓉 2890164126@qq.com

  • 中图分类号: TN911.3

Orthogonal Multiuser Short Reference High Rate Differential Chaos Shift Keying Communication System

Funds: The National Natural Science Foundation of China (61771085), The Research Project of Chongqing Educational Commission (KJ1600407, KJQN201900601)
  • 摘要: 针对传统多用户短参考混沌移位键控通信系统传输速率和能量效率低的问题,该文提出了一种正交多用户高速短参考差分混沌移位键控(OMU-SRHR-DCSK)通信系统。系统将参考信号长度缩短为每个数据信号长度的1/P,通过增加两路连续的信息时隙来传输多个用户信息比特,通过希尔伯特变换在每个信息时隙多传输N个用户信息比特,极大地提高了系统的数据传输速率。将希尔伯特变换和Walsh码相结合完全消除了用户间干扰,改善了误码率性能。推导了OMU-SRHR-DCSK系统在加性高斯白噪声(AWGN)信道和多径瑞利衰落信道(RFC)中的比特误码率(BER)公式并进行了实验验证。在两种信道下的仿真值和理论推导值均相等,验证了理论推导的正确性。该系统的传输速率相对于传统多用户短参考系统的传输速率有极大提升,传输比特数相同的条件下系统的误码性能明显优于传统多用户短参考系统,证明了该系统具有优异的实用价值,并为其应用于实际中提供了良好的理论支撑。
  • 图  1  正交混沌基信号集

    图  2  OMU-SRHR-DCSK和DCSK系统第$ k $帧结构对比图

    图  3  OMU-SRHR-DCSK系统发送端框图

    图  4  OMU-SRHR-DCSK系统接收端框图

    图  5  传输速率提升百分比

    图  6  比特能量节约百分比

    图  7  DCSK的平方幅度谱图

    图  8  OMU-SRHR-DCSK的平方幅度谱

    图  9  多径RFC信道模型

    图  10  N不同,BER随$ {E_{\text{b}}}{\text{/}}{N_0} $变化曲线

    图  11  P不同,BER随$ {E_{\text{b}}}{\text{/}}{N_0} $变化曲线

    图  12  R不同,BER随$ {E_{\text{b}}}{\text{/}}{N_0} $变化曲线

    图  13  不同N$ {E_{\text{b}}}{\text{/}}{N_0} $,BER随R的变化曲线

    图  14  不同P$ {E_{\text{b}}}{\text{/}}{N_0} $,BER随R变化曲线

    图  15  不同系统在AWGN信道中误码性能对比

    图  16  不同系统在两径RFC信道中误码性能对比

    图  17  OMU-SRHR-DCSK系统在两种增益下的性能对比

    表  1  OMU-SRHR-DCSK, SRMR-DCSK, HMU-DCSK和FDM-HEDCSK系统的传输速率和能量效率

    系统传输速率(R)能量效率(EE)
    OMU-SRHR-DCSK$ 4N/(R + 2\beta ) $$ 4N\beta /(R + 4N\beta ) $
    SRMR-DCSK$ N/(R + \beta ) $$ N\beta /(R + N\beta ) $
    HMU-DCSK$ N/\beta $$ 2N/(1 + 2N) $
    FDM-HEDCSK$ 2/\beta $$ 1/2 $
    下载: 导出CSV
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出版历程
  • 收稿日期:  2020-08-20
  • 修回日期:  2021-07-15
  • 网络出版日期:  2021-09-19
  • 刊出日期:  2021-11-23

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