TIME-FREQUENCY METHOD AND ITS APPLICATION IN DIGITAL SEISMIC WAVE DATA PROCESSING
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    Abstract:

    The time-frequency distribution of signal is more suitable for depicting unsteady signal than time-scale distribution. The development tendency of time-frequency analyses is improving the time-frequency conglomeration characteristics of signal and decreasing across disturbance energy item further. Based on the theory of time-frequency analyses on high order moment,this paper applies time-frequency technology to digital seismic wave data processing first. Compared Choi-Willams time-frequency distribution results of imitation signal with Wigner time-frequency distribution with different order moment, We think that high order moment Choi-Willams time-frequency distribution has higher time-frequency conglomeration characteristics and weaker across disturbance energy item, which has application foreground to improving earthquake source and medium parameters precision and intelligentized degree of earthquake emergency.

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History
  • Received:January 10,2003
  • Revised:
  • Adopted:
  • Online: June 24,2017
  • Published: