Demodulation Algorithm Based on Higher Order Synchrosqueezing

Duong-Hung Pham (1, 2) , Sylvain Meignen (3)

1 IRIT-MINDS - CoMputational imagINg anD viSion
2 ICube - Laboratoire des sciences de l'ingénieur, de l'informatique et de l'imagerie
3 CVGI - Calcul des Variations, Géométrie, Image

This paper addresses the problem of detecting and retrieving amplitude-and frequency-modulated (AM-FM) components or modes of a multicomponent signal from its time-frequency representation (TFR) corresponding to its short-time Fourier transform. For that purpose, we introduce a novel technique that combines a high order synchrosqueezing transform (FSSTN) with a demodulation procedure. Numerical results on a multicomponent signal, both in noise-free and noisy cases, show the benefits for mode reconstruction of the proposed approach over similar techniques that do not make use of demodulation.

Mots clés: synchrosqueezing techniques; demodulation; multi-component signals; AM-FM mode; time-frequency analysis

Domaines: Traitement du signal et de l'image [eess.SP]; Analyse fonctionnelle [math.FA]

Duong-Hung Pham, Sylvain Meignen. Demodulation Algorithm Based on Higher Order Synchrosqueezing. 27th European Signal Processing Conference (EUSIPCO 2019), Sep 2019, A Coruna, Spain. pp.1-5, ⟨10.23919/EUSIPCO.2019.8902962⟩. ⟨hal-02573681⟩