基于delta指数带通滤波的EMD及其在地震信号分析中的应用

bstract: Decompose seismic signal into predominant-period components without frequency spectrum mixing is a meaningful work for seismic signal processing. Two novel EMD algorithms based on the proposed recursive high-pass filter on the input signal are put forward and the performances of the proposed algorithms are researched by simulated signals. Finally, a novel EMD is put forward based on band-pass filter whose unified-boundary-frequency parameters obey the exponent rule. Experiments on natural seismic signals are designed for analysis and are made with a view to demonstrating the validity of the proposed method. The results of the experiments indicate that the proposed exponent band-pass filter based EMD can overcome mode mixing with the predominant-period components without empirical period spectrum mixing, and is successfully applied to the intermittency spectral analysis and seismic phases analysis of seismic signal. The proposed method provides a novel approach for seismic signal analysis.