| 基于多重互相关函数计算地探信号到时差 |
| |
| 引用本文： | 何先龙,杨立志,赵立珍,杨学山. 基于多重互相关函数计算地探信号到时差[J]. 地球物理学进展, 2009, 24(4): 1516-1520. DOI: 10.3969/j.issn.1004-2903.2009.04.046 |
| |
| 作者姓名： | 何先龙 杨立志 赵立珍 杨学山 |
| |
| 作者单位： | 中国地震局工程力学研究所,哈尔滨,150080;防灾科技学院,燕郊,101601 |
| |
| 摘 要： | 论文介绍了一种提高地震等地探信号到时差精度的新方法-多重互相关函数法. 从理论上推导出了多重互相关函数的公式，且通过实验验证了用此函数不仅能提高信号的信噪比，还能提取出相似信号所共有的频率信号，进而精确地识别出它们的到时差.探讨了此原理在场地、地震剪切波速信号到时差提取中的应用，分析结果显示:相比互相关函数，多重互相关函数能更准确地求取两相似信号的初至时刻差.
|
| 关 键 词： | 多重互相关函数 互相关函数 到时差 自相关函数 |
| 收稿时间： | 2008-10-12 |
| 修稿时间： | 2009-03-05 |
Calculation of wave arrival time difference of earth-exploration signals based on multiple cross-correlation function |
| |
| HE Xian-long,YANG Li-zhi,ZHAO Li-zhen,YANG Xue-shan. Calculation of wave arrival time difference of earth-exploration signals based on multiple cross-correlation function[J]. Progress in Geophysics, 2009, 24(4): 1516-1520. DOI: 10.3969/j.issn.1004-2903.2009.04.046 |
| |
| Authors: | HE Xian-long YANG Li-zhi ZHAO Li-zhen YANG Xue-shan |
| |
| Abstract: | A new method for detection of wave arrival time difference of earthquakes and other earth signals based on multiple cross-correlation function is introduced in this paper. The formula of the multiple cross-correlation function is derived and using this function not only can improve the SNR of shear-wave signals but also can extract common frequency components of two similar signals, which is certificated through experiments. Furthermore, difference of their arrival times can be detected accurately. This principle can be used to deal signals such as earthquake shear-wave. Analysis results show that compared with cross-correlation, multiple cross-correlation function can be used to detect waves arrival time difference more accurately. |
| |
| Keywords: | multiple cross-correlation function cross-correlation function the arrival time difference auto-correlation function |
| 本文献已被 万方数据 等数据库收录！ |
| 点击此处可从《地球物理学进展》浏览原始摘要信息 |
|
点击此处可从《地球物理学进展》下载免费的PDF全文 |
