摘要
在可控震源地震勘探信号处理中,利用发射信号和反射信号之间的时频分布相似性,提出了用小波包变换时频分布的二维相关算法,估计接收信号中各个反射信号分量的时间延迟。该方法能从信噪比为-4dB的接收信号中准确地对反射信号进行检测和时延估计。
In the signal processing of vibroseis exploration, utilizing the compa rability between the time-frequency distributions of sent signal and reflected s ignals, wavelet-packet time-frequency distribution's two-dimensional c orr elation arithmetic is used to estimate the time delays of the reflected signals in the r eceived signal. The experiment of simulation shows that this arithmetic can dete ct the reflected signals successfully from a -4 dB received signal and estimate the time delays accurately.
出处
《吉林大学学报（信息科学版）》
CAS
2003年第2期105-109,共5页
Journal of Jilin University（Information Science Edition）
基金
国家自然科学基金资助项目(49674232)
国家863计划资助项目(2002AA135240)
关键词
小波包
时频分布二维相关
时延估计
可控震源
Wavelet packet
Time-frequency distribution's two-dimension correlation
Time-delay estimation
Vibroseis
