Modélisation de signaux sonores par transformées temps-échelle et temps-fréquence

Analyse de Signaux Multicomposantes : Contributions à la Décomposition Modale Empirique, aux Représentations temps-fréquence et au Synchrosqueezing

Many signals from the physical world can be modeled accurately as a superposition of amplitude-and frequency-modulated waves. This includes audio signals (speech, music), medical data (ECG) aswell as temporal series (temperature or electric consumption). This thesis deals with the analysis of suchsignals, called multicomponent because they contain several modes. The techniques i...

Modélisation statistique et probabiliste du TEMPS INTER-VEHICULAIRE aux différents niveaux de trafic

Time Headway (TH) is a microscopic variable in traffic flow theories that has been studied since the 1930s. Distribution of this fundamental variable describes the arrival pattern of vehicles in traffic flow, so probabilistic modeling is the main approach to study TH and represents driving behavior. The applications of the variable in traffic engineering are varied ; include capacity calculatio...

Project-team Metiss Modélisation Et Expérimentation Pour Le Traitement Des Informations Et Des Signaux Sonores Rennes

Editeurs par contexte pour systèmes conversationnels à partage de temps

Analyse Temps-Fréquence appliquée à l'imagerie SAR polarimétrique

This paper deals with the analysis of the non-stationary behavior of scatterers in polarimetric SAR imaging . A method based on continuous wavelet and incoherent polarimetric decompositions is proposed to extract the polarimetric timefrequency signatures of scatterers. These signatures characterize scatterers according to their polarimetric /or energetic behavior versus the emitted frequency an...