时频分析技术在地震信号初至估计中的应用

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英文篇名：Application on technique of joint time-frequency analysis of seismic signal's first arrival estimation 中文刊名：核电子学与探测技术 英文刊名：Nuclear Electronics & Detection Technology 作者：许朝阳 ; 季国华 ; 刘俊民 ; 范延芳 英文作者：XU Chao-yang1 ; JI Guo-hua2 ; LIU Jun-min1 ; FAN Yan-fang1(1.CTBT Beijing National Data Centre ; Beijing 100085 ; China ; 2.Northwest Institute of Nuclear Technology ; Xi'an of Shaanxi Prov.710024 ; China) 中文关键词：时频分析 ; 三重相关 ; 时频谱图 ; 初至估计 英文关键词：joint time-frequency analysis ; triple correlation ; joint time-frequency spectrum ; estimation of first arrival 出版日期：2008-09-20 机构：禁核试北京国家数据中心;西北核技术研究所; 年：2008 期：05 出版单位：核电子学与探测技术

摘要

时频分析旨在构造一种时间和频率的联合密度函数,继而揭示信号所含频率分量及其演化特性,是传统Fourier分析的新进展、乃至于革命。本文通过对地震信号噪声特性的分析,研究了基于联合时频谱图三重相关的地震信号初至的估计方法,并给出了实验结果和结论。
Joint time-frequency analysis is conducted to construct one joint density function of time and frequency.It can open out one signal's frequency components and their evolvements.It is the new evolvement of Fourier analysis.In this paper,according to the characteristic of seismic signal's noise,one estimation method of seismic signal's first arrival based on triple correlation of joint time-frequency spectrum is introduced,and the results of experiment and conclusion are presented.

引文

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