Chaojie Wang
ABSTRACT
The empirical mode decomposition (EMD) method has been applied successfully to various scientific and engineering areas since proposed. Despite certain attempts to analyze its properties, it is still lacking in a unified theory basis. In order to gain a better understanding of the EMD method, its sifting process and the resulting intrinsic mode functions (IMFs) are analyzed in this paper. It is found that IMFs except the first one are composed of interpolation basis functions. The construction of these interpolation basis functions is dependent on the given data points. Numerical experiments illustrate that both the selection of interpolation basis function types and sampling rate of data points influence the performance of the EMD type methods.
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Index Terms
- On the component properties of the EMD method
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