Analyse des échos de cibles Sonar par Transformation de Huang-Teager (THT)*
Analysis of Sonar targets by Teager-Huang Transform (THT)
OPEN ACCESS
In this paper, an approach for Sonar targets analysis based on a new energy-time-frequency representation, called Teager-Huang Transform (THT), is presented. The THT is the combination of the empirical mode decomposition of Huang and the Teager-Kaiser signal demodulation method. The THT is free of interferences and does not requires basis functions for signals decomposition. The analysis is carried out, in free field, from the impulse responses of Sonar targets. We compare the analysis results of impulse responses of spherical and cylindrical targets given by THT to those of the smoothed Wigner-Ville transformation.
Résumé
Dans cet article, nous présentons une approche de l’analyse des échos de cibles Sonar basée sur une nouvelle représentation temps-fréquence appelée Transformation de Huang Teager (THT). Cette méthode est une combinaison de la décomposition modale empirique de Huang et de l’opérateur de démodulation de Teager-Kaiser. Contrairement aux représentations temps-fréquence classiques, la THT ne présente pas d’interférences et ne nécessite pas de fonctions de base pour la décomposition des signaux. L’analyse des échos de cibles Sonar est réalisée à partir de leurs réponses impulsionnelles en champ libre. Nous comparons les résultats d’analyse des réponses impulsionnelles de cibles sphériques et cylindriques de la THT à ceux de la transformation de Wigner-Ville lissée.
Time frequency analysis, Empirical mode decomposition, Teager-Kaiser energy operator, Teager Huang Transform (THT), Sonar echos
Mots clés
Analyse temps-fréquence, Décomposition modale empirique, Opérateur d’énergie de Teager-Kaiser, Transformation de Huang-Teager (THT), Échos de cibles Sonar
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