An application of matching pursuit timefrequency decomposition method using multiwavelet dictionaries |
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Authors: | Zhao Tianzi and Song Wei |
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Affiliation: | Library of China University of Petroleum, Beijing 102249, China;CNPC Key Laboratory of Geophysical Exploration, China University of Petroleum, Beijing 102249, China |
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Abstract: | In the time-frequency analysis of seismic signals, the matching pursuit algorithm is an effective tool for non-stationary signals, and has high time-frequency resolution and a transient structure with local self-adaption. We expand the time-frequency dictionary library with Ricker, Morlet, and mixed phase seismic wavelets, to make the method more suitable for seismic signal time-frequency decomposition. In this paper, we demonstrated the algorithm theory using synthetic seismic data, and tested the method using synthetic data with 25% noise. We compared the matching pursuit results of the time-frequency dictionaries. The results indicated that the dictionary which matched the signal characteristics better would obtain better results, and can reflect the information of seismic data effectively. |
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Keywords: | Matching pursuit seismic attenuation wavelet transform Wigner Ville distribution timefrequency dictionary |
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