High Resolution Time-Frequency Analysis Base on Ricker Atom Matching Pursuit Decomposition

Abstract:

The high accuracy time-frequency representation of non-stationary signals is one of the key researches in seismic signal analysis. Low-frequency part of the seismic data often has a higher frequency resolution, on the contrary it tends to have lower frequency resolution in the high frequency part. It’s difficult to fine characterize the time-frequency variation of non-stationary seismic signals by conventional time-frequency analysis methods due to the limitation of the window function. Therefore based on the Ricker wavelet, we put forward the matching pursuit seismic trace decomposition method. It decomposes the seismic records into a series of single component atoms with different centre time, dominant frequency and energy, by making use of the Wigner-Ville distribution, has the time-frequency resolution of seismic signal reach the limiting resolution of the uncertainty principle and skillfully avoid the impact of interference terms in conventional Wigner-Ville distribution.

• Periodical: Applied Mechanics and Materials (Volumes 284-287)
• Pages: 3115-3119
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.284-287.3115
• Online since: January 2013
• Authors: Wei Song, Jia Hui Zuo, Peng Cheng Hu
• Keywords: Frequency Resolution, Matching Pursuit, Ricker Wavelet, Time Resolution, Time-Frequency Analysis, Wigner-Ville Distribution (WVD)

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