无线电工程2012，Vol.42Issue(1)：17-20,4.
基于Duffing混沌振子的微弱信号检测研究
Research of Weak Signal Detection Based on Duffing Chaotic Oscillator
朱来普 1张陆勇 1谢文凤 1李楠1
作者信息
- 1. 北京邮电大学信息与通信工程学院,北京100876
- 折叠
摘要
Abstract
Traditional weak signal detection methods have poor performance when detecting weak signals, while Duffing oscillator shows good detection effect since it is sensitive to iinitial condition and has good resistance to noise. The basic form and dynamical evolution process of Duffing equation are analyzed, the operation principle of weak signal detection based on phase plane changes is introduced, a novel method for accurately determining the phase change threshold is proposed, and the influence of noise on the threshold is discussed. MATLAB software is used for simulation, the result of which shows that weak signals can be detected with a signal-to-noise ratio of-130 dB.关键词
微弱信号/信号检测/混沌理论/Duffing振子Key words
weak signal/signal detection/chaos theory/Duffing oscillator分类
信息技术与安全科学引用本文复制引用
朱来普,张陆勇,谢文凤,李楠..基于Duffing混沌振子的微弱信号检测研究[J].无线电工程,2012,42(1):17-20,4.
