Abstract
The Iterative Filtering method is a technique developed recently for the decomposition and analysis of nonstationary and nonlinear signals. In this work, we propose two alternative formulations of the original algorithm which allows to transform the iterative filtering method into a direct technique, making the algorithm closer to an online algorithm. We present a few numerical examples to show the effectiveness of the proposed approaches.
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Notes
Matlab code available at https://dept.atmos.ucla.edu/tcd/ssa-tutorial-matlab
LOD dataset is maintained by the The International Earth Rotation and Reference Systems Service and it can be downloaded from http://hpiers.obspm.fr/eoppc/eop/eopc04/eopc04.62-now. A guide describing how the dataset has been generated can be downloaded from http://hpiers.obspm.fr/eoppc/eop/eopc04/C04.guide.pdf
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Acknowledgments
The author want to thank Haomin Zhou for all the interesting conversations they had and all the suggestions he gave to him. He is indeed a great researcher and a great person.
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Cicone, A. Iterative filtering as a direct method for the decomposition of nonstationary signals. Numer Algor 85, 811–827 (2020). https://doi.org/10.1007/s11075-019-00838-z
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DOI: https://doi.org/10.1007/s11075-019-00838-z
Keywords
- Iterative filtering
- Direct method
- Signal decomposition
- Nonstationary signal
- Empirical mode decomposition
- Fast algorithms
- Fast Fourier transform
- Nonlinear and nonstationary signals