Empirical Mode Decomposition Based on Bistable Stochastic Resonance Denoising
The empirical mode decomposition (EMD) of weak signals submerged in a heavy noise was conducted and a method of stochastic resonance (SR) used for noisy EMD was presented. This method used SR as pre-treatment of EMD to remove noise and detect weak signals. The experiment result proves that this method, compared with that using EMD directly, not only improve SNR, enhance weak signals, but also improve the decomposition performance and reduce the decomposition layers.
KeywordsWeak Signal Sine Wave Empirical Mode Decomposition Stochastic Resonance Local Average
This work is supported by national 863 project fund Grant # 2007AA04Z414 and National Natural Science Foundation of China Grant # 50675153.
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