Many practical applications require ridge curves detection and enhancement as they allow for instantaneous frequency estimation of nonstationary signals. Unfortunately, the reconstruction of those curves becomes a difficult task whenever multicomponent signals having non-separable modes have to be analyzed. To address this issue, this paper introduces a novel binary model for the spectrogram of multicomponent signals, and applies skeleton to enhance IF curves. To further improve the skeleton-based reassignment, a convolution-deconvolution scheme, that is directly derived from a specific evolution law for signal time-frequency (TF) distribution, is also defined. Experimental results show that the skeleton-based approach can reproduce IF curves of separable modes accurately. In addition, it allows to outperform classical amplitude-based reassignment method in the case of non separable modes.

Skeleton-based reassignment of nonstationary signals spectrogram / Bruni, V.; Tartaglione, M.; Vitulano, D.. - In: DIGITAL SIGNAL PROCESSING. - ISSN 1051-2004. - 128:(2022), p. 103635. [10.1016/j.dsp.2022.103635]

Skeleton-based reassignment of nonstationary signals spectrogram

Bruni V.
;
Tartaglione M.;Vitulano D.
2022

Abstract

Many practical applications require ridge curves detection and enhancement as they allow for instantaneous frequency estimation of nonstationary signals. Unfortunately, the reconstruction of those curves becomes a difficult task whenever multicomponent signals having non-separable modes have to be analyzed. To address this issue, this paper introduces a novel binary model for the spectrogram of multicomponent signals, and applies skeleton to enhance IF curves. To further improve the skeleton-based reassignment, a convolution-deconvolution scheme, that is directly derived from a specific evolution law for signal time-frequency (TF) distribution, is also defined. Experimental results show that the skeleton-based approach can reproduce IF curves of separable modes accurately. In addition, it allows to outperform classical amplitude-based reassignment method in the case of non separable modes.
Binary spectrogram image; Instantaneous frequency; Interfering modes; Multicomponent signals; Skeleton; Time-varying amplitudes
01 Pubblicazione su rivista::01a Articolo in rivista
Skeleton-based reassignment of nonstationary signals spectrogram / Bruni, V.; Tartaglione, M.; Vitulano, D.. - In: DIGITAL SIGNAL PROCESSING. - ISSN 1051-2004. - 128:(2022), p. 103635. [10.1016/j.dsp.2022.103635]
File allegati a questo prodotto
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1652347
 Attenzione

Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo

Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 0
  • ???jsp.display-item.citation.isi??? 0
social impact