Time-frequency analysis of nonstationary fusion plasma signals: A comparison between the Choi-Williams distribution and wavelets

Journal Article · Fri Oct 01 00:00:00 EDT 2004 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/1.1787573· OSTI ID:20641289

Figueiredo, A C.A.; Nave, M F.F. ^[1]

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1. Centro de Fusao Nuclear, Associacao Euratom-IST, Instituto Superior Tecnico, 1049-001 Lisbon (Portugal)

The continuous wavelet transform scalogram, and recently the Choi-Williams distribution, have both been used to improve upon the short-time Fourier transform spectrogram in the analysis of some nonstationary phenomena in fusion plasmas. Here, a comparison is made with real fusion plasma signals that shows the advantages of the Choi-Williams distribution over wavelets as a complementary tool to the spectrogram.

• OSTI ID: 20641289
• Journal Information: Review of Scientific Instruments, Vol. 75, Issue 10; Conference: 15. topical conference on high temperature plasma diagnostics, San Diego, CA (United States), 19-22 Apr 2004; Other Information: DOI: 10.1063/1.1787573; (c) 2004 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); EFDA-JET Contributors; ISSN 0034-6748
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
FOURIER TRANSFORMATION
FREQUENCY ANALYSIS
PLASMA
PLASMA CONFINEMENT
PLASMA DIAGNOSTICS