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极低信噪比下对偶序列跳频信号的随机共振检测方法

刘广凯 全厚德 孙慧贤 崔佩璋 池阔 姚少林

刘广凯, 全厚德, 孙慧贤, 崔佩璋, 池阔, 姚少林. 极低信噪比下对偶序列跳频信号的随机共振检测方法[J]. 电子与信息学报, 2019, 41(10): 2342-2349. doi: 10.11999/JEIT190157
引用本文: 刘广凯, 全厚德, 孙慧贤, 崔佩璋, 池阔, 姚少林. 极低信噪比下对偶序列跳频信号的随机共振检测方法[J]. 电子与信息学报, 2019, 41(10): 2342-2349. doi: 10.11999/JEIT190157
Guangkai LIU, Houde QUAN, Huixian SUN, Peizhang CUI, Kuo CHI, Shaolin YAO. Stochastic Resonance Detection Method for the Dual-Sequence Frequency Hopping Signal under Extremely Low Signal-to-Noise Radio[J]. Journal of Electronics & Information Technology, 2019, 41(10): 2342-2349. doi: 10.11999/JEIT190157
Citation: Guangkai LIU, Houde QUAN, Huixian SUN, Peizhang CUI, Kuo CHI, Shaolin YAO. Stochastic Resonance Detection Method for the Dual-Sequence Frequency Hopping Signal under Extremely Low Signal-to-Noise Radio[J]. Journal of Electronics & Information Technology, 2019, 41(10): 2342-2349. doi: 10.11999/JEIT190157

极低信噪比下对偶序列跳频信号的随机共振检测方法

doi: 10.11999/JEIT190157
基金项目: 河北省自然科学基金(F2017506006)
详细信息
    作者简介:

    刘广凯:男,1990年生,博士生,研究方向为微弱信号检测、通信抗干扰

    全厚德:男,1963年生,教授,研究方向为通信抗干扰、指控系统无线效能增强

    孙慧贤:男,1980年生,讲师,研究方向为指挥信息系统工程、战术无线通信技术

    崔佩璋:男,1974年生,副教授,研究方向为信息与通信系统

    池阔:男,1990年生,博士生,研究方向为机械系统状态检测、故障预测与健康管理

    姚少林:男,1992年生,助理工程师,研究方向为电子装备测试

    通讯作者:

    刘广凯 dreamer_gk@163.com

  • 中图分类号: TN918

Stochastic Resonance Detection Method for the Dual-Sequence Frequency Hopping Signal under Extremely Low Signal-to-Noise Radio

Funds: The Natural Science Foundation of Hebei Province (F2017506006)
  • 摘要: 针对对偶序列跳频(DSHF)在极低信噪比(SNR)下无法通信的问题,该文充分利用对偶序列跳频信号时、频域物理特征,提出一种随机共振(SR)检测方法,极大扩展该信号的应用场景。首先,通过分析对偶序列跳频的发射、接收信号及超外差解调的中频(IF)信号,构建随机共振系统,采用尺度变换调整中频信号;然后,引入判决时刻,将无定态解的非自治福克普朗克方程(FPE)转化为可解的自治方程,从而推导出含时间参量的概率密度周期定态解;其次,以最大后验概率为准则,得到检测概率、虚警概率和接收机工作特性(ROC)曲线;最后,得出以下结论:(1) 应用匹配随机共振检测对偶序列跳频信号的信噪比最低可达–18 dB;(2)对偶序列跳频与匹配随机共振结合,适用于信噪比在–18~–14 dB的信号检测;(3)应用匹配随机共振检测对偶序列跳频信号在信噪比为–14 dB时,检测性能提升了25.47%。仿真实验验证了理论的正确性。
  • 图  1  对偶序列跳频发射结构

    图  2  对偶序列跳频接收结构

    图  3  判决区域及判决概率

    图  4  DSFH系统在不同SNR时的射频域时频图

    图  5  对偶序列跳频的中频信号经随机共振系统前后的时频域波形

    图  6  粒子处于不同位置时的概率密度

    图  7  对偶序列跳频信号的随机共振ROC曲线

    图  8  对偶序列跳频信号的随机共振检测性能随SNR变化情况

    图  9  对偶序列跳频信号的随机共振检测概率随先验概率变化情况

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出版历程
  • 收稿日期:  2019-03-18
  • 修回日期:  2019-05-27
  • 网络出版日期:  2019-06-03
  • 刊出日期:  2019-10-01

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