An alternative envelope approach for empirical mode decomposition

Authors:
Zhengguang Xu;Benxiong Huang;Kewei Li
Affiliations:
Department of Electronics and Information Engineering, Huazhong University of Science and Technology, Wuhan, China;Department of Electronics and Information Engineering, Huazhong University of Science and Technology, Wuhan, China;Department of Electronics and Information Engineering, Huazhong University of Science and Technology, Wuhan, China
Venue:
Digital Signal Processing
Year:
2010

Citing 2
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Abstract

The paper proposes an alternative envelope approach for empirical mode decomposition. Different from the existing envelope interpolation in the literature available, the new envelope has a simple analytical expression, by which the variations of the extrema in the iterative procedure are investigated in detail to reveal the nature of the sifting process. A comparison of the proposed envelope with the traditional cubic spline interpolation is made in the numerical simulation under a two-tone signal model, which shows that the proposed envelope approach has the fast convergence rate and the higher separation degree in the two-tone signal decomposition.