北京航空航天大学学报 ›› 2019, Vol. 45 ›› Issue (10): 2069-2078.doi: 10.13700/j.bh.1001-5965.2019.0032

• 论文 • 上一篇    下一篇

超低信噪比调频连续波引信信号小周期态Duffing振子检测

朱志强1, 侯健2, 闫晓鹏1, 栗苹1, 郝新红1   

  1. 1. 北京理工大学 机电动态控制重点实验室, 北京 100081;
    2. 北京京航计算通讯研究所, 北京 100074
  • 收稿日期:2019-01-22 出版日期:2019-10-20 发布日期:2019-10-31
  • 通讯作者: 闫晓鹏 E-mail:yanxiaopeng@bit.edu.cn
  • 作者简介:朱志强 男,硕士研究生。主要研究方向:无线电引信对抗技术;侯健 女,博士。主要研究方向:引信信息对抗技术、微弱信号检测技术;闫晓鹏 男,博士,教授,博士生导师。主要研究方向:引信信息对抗技术、引信电磁环境与效应、引信信号处理技术。
  • 基金资助:
    国家自然科学基金(61673066)

Small-scale periodic state Duffing oscillator FMCW fuze signal detection at ultra-low SNR

ZHU Zhiqiang1, HOU Jian2, YAN Xiaopeng1, LI Ping1, HAO Xinhong1   

  1. 1. Science and Technology on Electromechanical Dynamic Control Laboratory, Beijing Institute of Technology, Beijing 100081, China;
    2. Beijing Jinghang Research Institute of Computing and Communication, Beijing 100074, China
  • Received:2019-01-22 Online:2019-10-20 Published:2019-10-31
  • Supported by:
    National Natural Science Foundation of China (61673066)

摘要: 针对超低信噪比(SNR)下调频连续波(FWCW)引信信号难以检测的问题,结合Duffing振子特性和可停振动系统理论,建立了小周期态Duffing振子检测系统。该系统能够克服传统Duffing振子强参考信号检测的固有缺陷,扩展单个Duffing振子的信号频率检测范围,并降低算法复杂度。在此基础上,分析Duffing振子相轨迹特性,提出了基于小周期态Duffing振子的调频连续波引信信号检测方法。实验结果表明,小周期态Duffing振子检测方法在-30 dB的超低信噪比下对真实调频引信辐射信号的平均检测误差小于1%,验证了本文方法的有效性。

关键词: 调频连续波(FMCW)引信, Duffing振子, 小周期态, 可停振动系统, 信噪比(SNR)

Abstract: Aimed at the problem that the signal of frequency-modulated continuous wave (FMCW) fuze is very difficult to detect at ultra-low signal to noise ratio (SNR), a detection system based on small-scale periodic state Duffing oscillator is established. This system combines Duffing oscillator characteristics with stopping oscillation system theory, eliminating the inherent deficiencies of the traditional transformation-dependent Duffing oscillator detection methods, extending the frequency detection range through a single Duffing oscillator, and reducing the computing cost. On this basis, the phase trajectory characteristics of the small-scale periodic state are analyzed, and then a FMCW fuze signal detection method based on small-scale periodic state Duffing oscillator is proposed. The experimental results show that the small-scale periodic state Duffing oscillator detection method has an average detection error of less than 1% for the real FMCW fuze radiation signal at -30 dB ultra-low SNR, which verifies the effectiveness of the proposed method.

Key words: frequency-modulated continuous wave (FMCW) fuze, Duffing oscillator, small-scale periodic state, stopping oscillation system, signal to noise ratio (SNR)

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