Figure 4
From: Robust post-processing time frequency technology and its application to mechanical fault diagnosis
TFR of the signal \(x(t)\) in infinite variance process noise environment (\(\alpha = 2\), \(SNR = 8\;{\text{dB}}\)). (a) STFT method; (b) FSTFT method; (c) SST method; (d) FSST method; (e) SET method; (f) FSET method; (g) SSET method; (h) FSSET method.
