An Adaptive Computation of Contour Representations for Mode Decomposition
Résumé
This letter addresses the problem of the detection and estimation of the modes of a multicomponent signal using the reassignment framework. More precisely, we propose a new algorithm to estimate the ridges representing the time-frequency (TF) signatures of the modes based on the local orientation of the reassignment vector (RV), and use them to define the so-called " basins of attraction " enabling modes' retrieval. Compared with previous approaches, this new technique not only enables reconstruction of AM/FM modes but also Dirac impulses, which is of great interest in many practical situations. Numerical experiments conducted with both synthetic and real data illustrate the effectiveness of the technique.
| Origine | Fichiers produits par l'(les) auteur(s) |
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