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《Telecommunication Engineering》 2016-01
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Estimation of Weak Signal Phase by Using Duffing-Vanderpol Oscillator

SUN Wenjun;RUI Guosheng;WANG Lin;TIAN Wenbiao;Department of Electronic and Information Engineering,Naval Aeronautical and Astronautical University;  
When Duffing- Vanderpol oscillator is in large- scale periodic motion,there are some nexus between the largest Lyapunov exponent and system driving force. According to this conclusion,an algorithm for detecting weak signals' phase based on Duffing- Vanderpol oscillator is proposed. Through finding the relationship between system driving force and the phase of weak signal,the weak signals' phase is detected. The noise impact on system is also considered. Theoretical analysis and simulation result show that this algorithm is easy to be realized in engineering with strong restrain ability to noise and high estimation accuracy. When the signal- to- noise ratio( SNR) of to- be- detected signals is equal to- 30 d B,the mean- square error( MSE) is only 0. 1.
【Fund】: 国家自然科学基金资助项目(41476089)~~
【CateGory Index】: TN911.23
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