5Castagna J P, Sun S, Siegfried R W. Instantaneous spectral analysis: Detection of low-frequency shadows associated with hydrocarbon [J]. The Leading Edge, 2003, 22(2):120-127.
6Rioul 0 and Vetterli M. Wavelets and signal processing. IEEE Signal Processing, 1991(4):14-38.
7Hlawatsch F and Boudreaux-Bartels G F. Linear and quadratic time-frequency signal representations. IEEE Signal Processing 1992(2):21-67.