摘要
在可控震源地震勘探信号处理中,为了提高反射信号时延估计的精度和压制噪声的能力,应当采用离散小波变换时频分布的二维相关算法代替传统的时域相关算法,利用发射信号和反射信号的时频分布相似性估计接收信号中各个反射信号分量的时间延迟。仿真实验证明,时频分布二维相关算法比传统的时域相关算法具有更强的压制噪声的能力,能很准确地进行时延估计。
In order to improve the accuracy of time-delay estimate and reduce noise in processing vibroseis signals, two-dimensional correlation arithmetic of time-frequency distribution in discrete wavelet transformation technique is applied to replace the traditional time-domain correlation method. The simulation experiment demonstrates that this new technique can more precisely estimate the time delay than the time-domain correlation method, and it also significantly reduces noise.
出处
《石油勘探与开发》
SCIE
EI
CAS
CSCD
北大核心
2003年第5期77-79,共3页
Petroleum Exploration and Development
基金
国家自然科学基金(49674232)
关键词
离散小波变换
时频分布二维相关
时延估计
可控震源
discrete wavelet transformation
two-dimensional correlation
time-delay estimate
vibroseis
