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SUMMARY OF THE HIGH PRECISION SPECTRUM DECOMPOSITION METHOD OF SEISMIC SIGNAL

ZHANG Yu;KANG Jian-hong;PANG Jing-yuan;LIU Hao;Changchun Seismic Station;Earthquake Administration of Jilin Province;  
The principle of time-frequency Analysis is elaborated detailedly, The common methods of time-frequency analysis are comparatively analyzed. The algorithms of spectral decomposition are studied,including Hilbert transform, S-transform, wavelet transform, Gabor transform, HHT, and matching pursuit, etc. The principles, advantages and shortcomings of each method are introduced in details.Contrast tests of analog signals have been done, Every frequency spectrum image is showed from different sides. The functions of every parameter in time and frequency domains are verified through debugging.
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