Title :
HHT time-frequency analysis of digital seismic waveform signals
Author_Institution :
Earthquake Adm. of Beijing Municipality, Beijing, China
Abstract :
The paper introduces HHT time-frequency analysis and the concept of instantaneous frequency, determines the empirical mode decomposition of a given signal and its time-frequency distribution and applies HHT time-frequency processing and analysis to the actual seismic waveform signals. Results show that the HHT method can accurately describe the nonlinear time variation of seismic waveform signals and is a powerful tool in seismic signal time-frequency analysis.
Keywords :
Hilbert transforms; geophysical signal processing; seismic waves; time-frequency analysis; waveform analysis; HHT time-frequency analysis; HHT time-frequency processing; Hilbert-Huang transform; digital seismic waveform signal; empirical mode decomposition; instantaneous frequency; nonlinear time variation; seismic signal time-frequency analysis; time-frequency distribution; Earthquakes; Fourier transforms; Frequency shift keying; Seismic waves; Time frequency analysis; Wavelet transforms; hilbert-huang transform; instantaneous frequency; seismic waveform; time-frequency analysis;
Conference_Titel :
Fuzzy Systems and Knowledge Discovery (FSKD), 2012 9th International Conference on
Conference_Location :
Sichuan
Print_ISBN :
978-1-4673-0025-4
DOI :
10.1109/FSKD.2012.6234242
