
一种改进的EMD降噪方法
AN IMPROVED EMD BASED DE-NOISING METHOD
An improved Empirical Mode Decomposition (EMD) based de-noising method is proposed in this paper. The improved method hybrids EMD based threshold de-noising and Savitzky-Golay filtering method. Noisy signal is decomposed into Intrinsic Mode Functions (IMFs), then the high frequency IMFs are de-noising by soft threshold method and the low frequency IMFs are de-noising by Savitzky-Golay filtering method. Thus the high frequency part and the smoothing property of the low frequency signal could be remained. The method is tested on simulated data and the de-noising performance of the improved method is better than the EMD based threshold method and the Savitzky-Golay filtering method used alone.
Empirical mode decomposition / Savitzky-Golay filtering / signal de-noising {{custom_keyword}} /
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