کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
272951 | 505037 | 2008 | 4 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Time–frequency analysis of fusion plasma signals beyond the short-time Fourier transform paradigm: An overview
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی انرژی
مهندسی انرژی و فناوری های برق
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چکیده انگلیسی
Performing a time–frequency (t–f) analysis on actual magnetic pick-up coil data from the JET tokamak, a comparison is presented between the spectrogram and the Wigner and Choi–Williams distributions. Whereas the former, which stems from the short-time Fourier transform and has been the work-horse for t–f signal processing, implies an unavoidable trade-off between time and frequency resolutions, the latter two belong to a later generation of distributions that yield better, if not optimal joint t–f localization. Topics addressed include signal representation in the t–f plane, frequency identification and evolution, instantaneous-frequency estimation, and amplitude tracking.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Fusion Engineering and Design - Volume 83, Issues 2–3, April 2008, Pages 350–353
Journal: Fusion Engineering and Design - Volume 83, Issues 2–3, April 2008, Pages 350–353
نویسندگان
João P.S. Bizarro, António C.A. Figueiredo,