Selection of Wavelet Basis Function in Process of Time-Frequency Analysis of Earthquake Signals using Wavelet Packet Transform
详细信息
- 责任者：Zeng Xianwei (Earthquake Administration of Ningxia Hui Autonomous Region ; Yinchuan 750001 ; China) ; Zhao Weiming
- 刊名：Journal of Seismological Research
- 出版年：2010
- 卷期：33(4)
- 关键词：小波变换 ; wavelet transform ; 地震勘探 ; seismic exploration
- 页码：p.323-328
- 图表：3 illus., 1 tables, 12 refs.
- 分类号：1600
- issnNo：ISSN1000-0666
- isbnNo：CN53-1062/P
摘要
Comparing amplitude-frequency characteristic of several different wavelet basis functions and carrying out time-frequency analysis of analog seismic record, the authors expect to find the wavelet basis function which exactly describes time-frequency characteristic of seismic signals while making time-frequency analysis with wavelet packet. Then, the result is that we can exactly describe time-frequency variation characteristics of analog seismic signals with wavelet basis function dmey. It means that wavelet basis function dmey is more appropriate for time-frequency analysis of earthquake signals using wavelet packet transform.
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