应用统计模型的地震信号端点检测方法
详细信息 本馆镜像全文    |  推荐本文 | | 获取馆网全文
摘要
分析了随机信号的相关性 ,建立了噪声的相关性统计模型 .提出了信号自相关系数相似距离的概念 ,证明并讨论了噪声和信号之间的可辨别“自相关相似距离” ,据此总结出基于相关系数的地震信号端点检测方法 ,并给出了算法的具体实现步骤 .阐述了检测阈值的确定方法 ,并对用此方法以及人工检测法得到的实验检测结果进行了比较 .结果表明 ,即使在较低的信噪比条件下 ,采用本算法仍能较准确地检测出地震信号的端点位置 .
Based on the analysis of the auto-correlation coefficient, the notion of the distance between auto-correlation coefficients was quoted, and the identifiable distance between the noise and the signal was proved and discussed. And based on the auto-correlated similarity, the auto-detection method of seismic signal endpoints was summed up. The steps of implementation and determining of the threshold were presented in detail. The experimental results that were compared with the method based on artificial detecting show that, the method based on the auto-correlated similarity have higher sensitivity even in a low SNR circumstance.
引文
[1] 吴忠良 ,陈运泰 .核爆炸地震学概要 [M].北京 :地震出版社 ,1994.85~ 94.
    [2 ] LeprettreB ,MartinN .Three componentsignalrecogni tionusingtime,time frequency ,andpolarizationinfor mation :applicationtoseismicdetectionofavalanches[J].IEEETransonSignalProcessing ,1998,46 (1) :83~10 2 .
    [3] 梁泰基 ,刘福声 .统计无线电理论 [M].长沙 :国防科技大学出版社 ,1988.47~ 5 4.
    [4 ] 陈斐利 ,朱 杰 .一种新的基于自相关相似距离的语音信号端点检测方法 [J].上海交通大学学报 ,1999,33(9) :10 97~ 10 99.
    [5 ] 赵淑清 ,郑 薇 .随机信号分析 [M ].哈尔滨 :哈尔滨工业大学出版社 ,1999.6 5~ 83.
    [6 ] 范万春 ,李真富 ,孙 煜 ,等 .远震P波群信号的自适应时 频分析 [J].计算物理 ,2 0 0 0 ,17(1 2 ) :95~ 10 1.

版权所有:© 2023 中国地质图书馆 中国地质调查局地学文献中心