基于经验周期模态单元滤波的地震信号消噪
首发时间:2008-09-18
摘要:由于地震信号采集环境和采集仪器存在干扰,采集到的地震波形中通常包含了很多噪声信号,严重影响了对地震信号的应用。模态单元滤波(Mode Cell Filter:MCF)无需先验基函数,是一种自适应的消噪算法。本文将MCF引入到地震信号消噪中,提出了一种基于MCF的地震信号消噪算法,并用仿真信号和实测地震信号进行了消噪试验,试验结果表明,本文算法可有效消除地震信号各种低频和高频噪声,消噪后的地震信号质量满足观测要求。
关键词: EMD 间隙高斯噪声 消噪 模态单元滤波 自适应滤波
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Empirical-Period-Based Mode Cell Filter for Seismic Data Denoising
Abstract:As there are interfere sources in the surroundings and instruments for the collections of the seismic wave signals, the seismic waves collected may always be interrupted by many noises, which affects the further applications of the seismic waves. The mode cell filter is a novel adaptive denoising method with no need for pre-defined basic functions. In this paper the MCF is introduced to the seismic wave denoising, and a MCF-based automobile noise eliminating method is proposed. Experiments on artificial and natural signals are designed for denoising. The results demonstrate that, the low-frequency and heigh-frequency noises can be eliminated effectivelly by the the Empirical-Period-Based Mode Cell Filter, and the denoised seismic data are satisfied for further observation.
Keywords: EMD Seismic data Mode Cell Filter Adaptive Filter
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