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小波包在可控震源地震信号时延估计中的应用
Application of wavelet packet in time-delay estimation of signal of vibroseis exploration
【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。
【Abstract】 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.
【关键词】 小波包;
时频分布二维相关;
时延估计;
可控震源;
【Key words】 Wavelet packet; Time-frequency distribution’s two-dimension correlation; Time-delay estimation; Vibroseis;
【Key words】 Wavelet packet; Time-frequency distribution’s two-dimension correlation; Time-delay estimation; Vibroseis;
【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)
- 【文献出处】 吉林大学学报(信息科学版) ,Journal of Changchun Post and Telecommunication Institute , 编辑部邮箱 ,2003年02期
- 【分类号】TP14
- 【被引频次】5
- 【下载频次】103