Title :
Improved time-frequency visualization of chirping mode signals in Tokamak plasmas using the Choi-Williams distribution
Author :
Figueiredo, A.C.A.
Author_Institution :
Centro de Fusao Nucl., Inst. Superior Tecnico, Portugal
fDate :
4/1/2005 12:00:00 AM
Abstract :
The Choi-Williams distribution is used to create time-frequency images of chirping magnetohydrodynamic modes in the JET tokamak that have better resolution than plots based on the short-time Fourier transform spectrogram.
Keywords :
Tokamak devices; plasma instability; plasma magnetohydrodynamics; plasma toroidal confinement; Choi-Williams distribution; JET tokamak; chirping magnetohydrodynamic modes; chirping mode signals; short-time Fourier transform spectrogram; time-frequency visualization; tokamak plasma; Chirp; Fourier transforms; Image resolution; Magnetohydrodynamics; Plasmas; Signal resolution; Spectrogram; Time frequency analysis; Tokamaks; Visualization; Chirping modes; Choi-Williams distribution; frequency splitting; frequency sweeping; fusion plasmas; magnetohydrodynamics; time-frequency analysis;
Journal_Title :
Plasma Science, IEEE Transactions on
DOI :
10.1109/TPS.2005.845390
