Time-frequency Extraction Algorithm of Harmonic Signal from Lorenz Mixed Signal
The separation of chaos and signal is an important problem of chaos signal processing. In recent years, the time-frequency analysis method is more and more mature. This paper first introduces the basic theory of time-frequency methods. We compare wavelet method with empirical mode decomposition (EMD) method, according to the different noise situation of the performance analysis of harmonic signal extraction in chaos background. Summarize a new synthesis about wavelet threshold and empirical mode decomposition (EMD) complementary of new harmonic signal extraction by experimental simulation. Computer simulation verified that the methods are high availability.
Keywords: Harmonic Signal, Chaos, Wavelet, Empirical Mode Decomposition, Blind Sources Extraction.
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ABOUT THE AUTHORS
Er-Fu Wang
Key Laboratory of Electronics Engineering, College of Heilongjiang Province Heilongjiang University, P. R. China
Qiang Liu
Key Laboratory of Electronics Engineering, College of Heilongjiang Province Heilongjiang University, P. R. China
Qun Ding
Key Laboratory of Electronics Engineering, College of Heilongjiang Province Heilongjiang University, P. R. China
Er-Fu Wang
Key Laboratory of Electronics Engineering, College of Heilongjiang Province Heilongjiang University, P. R. China
Qiang Liu
Key Laboratory of Electronics Engineering, College of Heilongjiang Province Heilongjiang University, P. R. China
Qun Ding
Key Laboratory of Electronics Engineering, College of Heilongjiang Province Heilongjiang University, P. R. China