三阶累积量在可控震源勘探信号处理中的应用

英文篇名：The Application of Three-Order Cumulant in the Processing of Vibrator Data
中文刊名：系统工程与电子技术
英文刊名：Systems Engineering and Electronics
作者：蒋忠进 ; 林君 ; 陈祖斌
英文作者：JIANG Zhongjin ; LIN Jun ; CHEN Zubin (Electrical Science and Engineering College of Jilin University ; Changchun 130026 ; China)
中文关键词：地震探测 ; 信号处理 ; 噪声抑制
英文关键词：Seismic detection ; Signal processing ; Nosie suppression
出版日期：2003-11-20
机构：吉林大学朝阳校区电子科学与工程学院仪器系,吉林大学朝阳校区电子科学与工程学院仪器系,吉林大学朝阳校区电子科学与工程学院仪器系吉林长春130026 ,吉林长春130026 ,吉林长春130026
年：2003
期：11
出版单位：系统工程与电子技术

摘要

可控震源浅层地震勘探接收信号受环境噪声污染严重。为了提高压制噪声的能力,尝试用三阶累积量为数学工具,求出发射信号与接收信号的三阶互累积量,并把互累积量用发射信号自累积量进行线性分解。根据分解系数序列来检测接收信号中各反射信号分量的存在,并估计各反射信号分量的时间延迟。数值实验结果表明,该方法能从信噪比为0dB的接收信号中准确检测出反射信号分量并估计其时间延迟。鉴于高阶累积量具有屏蔽高斯噪声的优点,其用于可控震源地震勘探信号处理的效果比传统的相关方法要好。
Controlled vibrator shallowlayer seismic exploration data are mixed with strong environment noise. In order to raise the level of depressing noise, this paper tries using threeorder cumulant as mathematics tool of vibrator signal processing. First the threeorder crosscumulant of launched signal and received signal is calculated, then this threeorder crosscumulant is linearly decomposed based on the threeorder cumulant of launched signal. In according to the coefficient series of decomposition, we can detect the reflected signals comprised in the received signal and estimate their timedelays. The results of experiment show that method of threeorder cumulant can detect the reflected signals accurately from received signal whose SNR is 0 dB and estimate their timedelays precisely. Because highorder statistics has the virtue of depressing Gauss noise, as the experiment result shows, the method of threeorder cumulant can show a good effect in processing vibrator signal which is better than that of traditional method of correlation.

引文

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