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Abstract

Abstract

Algorithm of decomposition of profile measurements of geophysical data by adaptive basis is proposed. In the course of iterative process, the orthogonal different-frequency components of non-stationary signal close to intrinsic mode functions are allocated. In contrast to EMD, for the construction of the upper and lower envelopes of the signal, piecewise-defined functions with exponentially increasing length of the intervals of approximation are used. Local mean signal values are smoothed by harmonic functions whose parameters are determined by solving well-conditioned systems of linear algebraic equations. Distinctive features of the algorithm are the suppression of edges effects and mode mixing, which in some cases complicate the application of the EMD method. A practical example of algorithm application of magnetic data is given.

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/content/papers/10.3997/2214-4609.202051174
2020-09-14
2024-04-28

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Adaptive Separation of Abnormal Geomagnetic Field Components
Conference Proceedings 2020, 1 (2020); https://doi.org/10.3997/2214-4609.202051174
/content/papers/10.3997/2214-4609.202051174
/content/papers/10.3997/2214-4609.202051174
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