Decomposition of Seismic Signal Based on Hilbert-Huang Transform
HilbertHuang transform (HHT) is a new timefrequency analytic method to get frequency variation with time of the nonlinear and nonstationary signal. The basic implementation flow of this method includes two steps: empirical mode decomposition and Hilbert transform for instantaneous frequency. We can obtain the timefrequency spectrum of signal after these two steps. The key step of this method is empirical mode decomposition (EMD) with which any signal can be decomposed into a finite number of intrinsic mode functions (IMF). The IMF has clear physical significance. Applying Hilbert transform to those IMFs we obtain instantaneous frequency of each IMF. Displaying all the instantaneous frequencies on the same plane we get a time frequency spectrum. This paper takes real seismic signal for example, presents a kind of empirical mode decomposition method which is fit for the decomposition of seismic signal and illustrates the superiority of HilbertHuang transform in analyzing seismic signal and its existing problem. Finally we will summarize the application of HilbertHuang transform in seismic data processing.
Hilbert-Huang Transform signaldecomposition empirical mode decomposition frequency analyze
Jian-guo Song Song-hui Lin Cui-xia Zhao Hao-jie Liu
Department of geophysics China University of Petroleum Qingdao, China Shengli Geophysical Prospecting Institute SINOPEC Dongying, China Department of geophysicsChina University of PetroleumQingdao, China
国际会议
广州
英文
1-4
2011-05-13（万方平台首次上网日期，不代表论文的发表时间）