skip to main content
LOTERRE

LOTERRE

Mathematics (thesaurus)

Choisissez le vocabulaire dans lequel chercher

Langue des données

| español English
Aide à la recherche

Concept information

... > mathematical analysis > functional analysis > operator > integral transform > Fourier transform > short-time Fourier transform
... > mathematical analysis > functional analysis > transformation > integral transform > Fourier transform > short-time Fourier transform

Terme préférentiel

short-time Fourier transform  

Définition(s)

  • The short-time Fourier transform (STFT), is a Fourier-related transform used to determine the sinusoidal frequency and phase content of local sections of a signal as it changes over time. In practice, the procedure for computing STFTs is to divide a longer time signal into shorter segments of equal length and then compute the Fourier transform separately on each shorter segment. This reveals the Fourier spectrum on each shorter segment. One then usually plots the changing spectra as a function of time, known as a spectrogram or waterfall plot, such as commonly used in software defined radio (SDR) based spectrum displays. Full bandwidth displays covering the whole range of an SDR commonly use fast Fourier transforms (FFTs) with 2^24 points on desktop computers.
    (Wikipedia, The Free Encyclopedia, https://en.wikipedia.org/wiki/Short-time_Fourier_transform)

Concept(s) générique(s)

Traductions

URI

http://data.loterre.fr/ark:/67375/PSR-RJ6H56G8-V

Télécharger ce concept:

RDF/XML TURTLE JSON-LD Dernière modif. 12/10/2023