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Artículo

Adaptive local iterative filtering: A promising technique for the analysis of nonstationary signals

Piersanti, M.; Materassi, M.; Cicone, A.; Spogli, L.; Zhou, H.; Ezquer, Rodolfo GerardoIcon
Fecha de publicación: 12/2017
Editorial: American Geophysical Union
Revista: Journal of Geophysical Research
ISSN: 0148-0227
Idioma: Inglés
Tipo de recurso: Artículo publicado
Clasificación temática:
Meteorología y Ciencias Atmosféricas

Resumen

Many real-life signals and, in particular, in the space physics domain, exhibit variations acrossdifferent temporal scales. Hence, their statistical momenta may depend on the time scale at which the signal is studied. To identify and quantify such variations, a time-frequency analysis has to be performed on these signals. The dependence of the statistical properties of a signal fluctuation on the space and time scales is the distinctive character of systems with nonlinear couplings among different modes. Hence, assessing how the statistics of signal fluctuations vary with scale will be of help in understanding the corresponding multiscale statistics of such dynamics. This paper presents a new multiscale data analysis technique, the adaptive local iterative filtering (ALIF), which allows to describe the multiscale nature of the geophysical signal studied better than via Fourier transform, and improves scale resolution with respect to discrete wavelet transform. The example of geophysical signal, to which ALIF has been applied, is ionospheric radio power scintillation on L band. ALIF appears to be a promising technique to study the small-scale structures of radio scintillation due to ionospheric turbulence.
Palabras clave: New Data Analisys Tool , Nonstationary And Nonlinearity , Statistical Analysis , Radio Scintillation Signal
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info:eu-repo/semantics/openAccess Excepto donde se diga explícitamente, este item se publica bajo la siguiente descripción: Creative Commons Attribution-NonCommercial-ShareAlike 2.5 Unported (CC BY-NC-SA 2.5)
Identificadores
URI: http://hdl.handle.net/11336/66165
DOI: https://doi.org/10.1002/2017JA024153
URL: https://agupubs.onlinelibrary.wiley.com/doi/abs/10.1002/2017JA024153
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Articulos(CCT - NOA SUR)
Articulos de CTRO.CIENTIFICO TECNOL.CONICET - NOA SUR
Citación
Piersanti, M.; Materassi, M.; Cicone, A.; Spogli, L.; Zhou, H.; et al.; Adaptive local iterative filtering: A promising technique for the analysis of nonstationary signals; American Geophysical Union; Journal of Geophysical Research; 123; 1; 12-2017; 1031-1046
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