[1] Magnetospheric ultra-low-frequency (ULF) waves (f = 1 mHz to 1 Hz) exhibit highly time-dependent characteristics due to the dynamic properties of these waves and, for observations in space, the spacecraft motion. These time-dependent features may not be properly resolved by conventional Fourier techniques. In this study we examine how the Wigner-Ville distribution (WVD) can be used to analy...

Vincent Larivière École de bibliothéconomie et des sciences de l’information, Université de Montréal, C.P. 6128, Succ. Centre-Ville, Montréal, QC, H3C 3J7, Canada, and Observatoire des sciences et des technologies (OST), Centre interuniversitaire de recherche, sur la science et la technologie (CIRST), Université du Québec à Montréal, CP 8888, Succ. Centre-Ville, Montréal, QC. H3C 3P8, Canada. E...

Teodor Gabriel Crainic Intelligent Transportation Systems Laboratory, Centre de recherche sur les transports, Université de Montréal, C.P. 8888, Succursale Centre-ville, Montréal, Québec, Canada H3C 3J7, and Département de management et technologie, École des Sciences de la Gestion, Université du Québec à Montréal, C.P. 6192, Succursale Centre-ville, Montréal, Québec, Canada H3C 4R2, [email protected]...

* DIRO, U. de Montréal, CP 6128, succ Centre-Ville, Montréal, Canada H3C 3J7 [email protected], ** France Télécom R&D/MAPS/AMS/VIP, 38-40 rue du Général Leclerc, 92794 Issy Les MoulineauxFrance ; [email protected], *** LIRMM, UMR 5506, 161 rue Ada, 34392 Montpellier Cedex 5 France [email protected] **** Dépt. d’informatique, UQÀM, CP 8888, succ. Centre-Ville, Montréal, Canada...

This paper is concerned with a synthesis study of the fast Fourier transform (FFT), the short time Fourier transform (STFT and the Wigner distribution (WD) in analysing the phonocardiogram signal (PCG) or heart cardiac sounds.     The FFT (Fast Fourier Transform) can provide a basic understanding of the frequency contents of the heart sounds. The STFT is obtained by calculating the Fourier tran...