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Time-frequency analysis of fusion plasma signals beyond the short-time Fourier transform paradigm: An overview

机译：超越短时傅立叶变换范例的融合等离子体信号的时频分析：概述

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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.
机译：对来自JET托卡马克的实际磁头线圈数据进行时频（t-f）分析，比较了频谱图与Wigner和Choi-Williams分布。前者源自短时傅立叶变换，一直是tf信号处理的主力军，暗示着时间和频率分辨率之间不可避免的权衡，后两者属于后代分布，其产生的质量更好，如果不是最佳的联合tf本地化。讨论的主题包括t-f平面中的信号表示，频率识别和演进，瞬时频率估计以及幅度跟踪。

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