基于ICA瞬时混合模型的多次波消减算法  

Multiple Attenuation Based on Instantaneous ICA Model

作　　者：高颖[1,2] 李月[3] 杨宝俊[2] 欧世峰[1] 

机构地区：[1]烟台大学光电信息科学技术学院,山东烟台264005 [2]吉林大学地球探测科学与技术学院,吉林长春130026 [3]吉林大学通信工程学院,吉林长春130012

出　　处：《应用基础与工程科学学报》2008年第6期920-929,共10页Journal of Basic Science and Engineering

基　　金：国家自然科学基金资助(40574051;40774054)

摘　　要：根据实际地震记录中一次波和多次波信号分布的非高斯特性,本文提出了一种基于ICA瞬时混合模型的多次波消减算法.与目前基于两个观测信号恢复两个源信号ICA的多次波自适应相减技术相比,本文采用了多个观测信号恢复多个源信号的ICA瞬时混合模型,并充分考虑了所有预测多次波与其相应实际多次波振幅比例系数不等的情况.而且利用对混合矩阵的先验特征的分析,解决了文中ICA模型固有的两个不确定性问题,实现了一次波的有效辨识和提取.According to the non-Gaussianity of the primary and the multiple, this paper presented an instantaneous ICA model and a novel algorithm for multiple attenuation. The proposed algorithm separated the primary from multiple by accounting for the different scale coefficients of each predictive muhiple corresponding to its real multiple in amplitude, it settled the two ambiguities of the separated primary that were inherent in ICA by using some special characters of the mixing matrix. Synthetic seismic data set derived from the time-distance equation is applied to validate the effectiveness of the proposed algorithm and experimental results indicate the improved performance of our algorithm.

关 键 词：多次波消减 独立分量分析 瞬时混合模型 非高斯 

分 类 号：P631.4[天文地球—地质矿产勘探]