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《Acta Electronica Sinica》 2013-01
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A New Weak Sinusoidal Signal Detection Method Based on Duffing Oscillators

LIU Hai-bo,WU De-wei,DAI Chuan-jin,MAO Hu(Information and Navigation Institute,Air Force Engineering University,Xi′an,Shaanxi 710077,China)  
It is found in numerical simulations that Duffing oscillator state transition from big-cycle motion to chaotic motion has more robust sensitivity to the amplitude of the forced periodic term than the transition from chaotic motion to big-cycle motion,as long as the reference signal initial phase and the Duffing oscillator initial value are matched.On this basis,a new weak sinusoidal signal detection scheme is advanced,whose feasibility is then analyzed.The advanced scheme shows higher detection capability by comparing with traditional methods.Besides,considering the characteristics of the Duffing oscillator phase space,a new Duffing oscillator motion state judging method is proposed,which features good real-time performance and low computational complexity,and is verified with simulations.
【Fund】: 国家自然科学基金(No.61174194)
【CateGory Index】: TN911.23
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