Characteristics and Signal Detection Method of Accurately Controlled Routinely Operated Signal System
详细信息
- 责任者：Yang Wei (Key Laboratory of Seismic Observation and Geophysical Imaging ; Institute of Geophysics ; China Earthquake Administration ; Beijing 100081 ; China) ; Wang Baoshan
- 刊名：Journal of China University of Petroleum
- 出版年：2013
- 卷期：37(1)
- 关键词：可控震源 ; vibroseis
- 页码：p.50-55,69
- 图表：illus., 2 tables, 20 refs.
- 分类号：1600
- issnNo：ISSN1673-5005
- isbnNo：CN37-1441/TE
摘要
Based on the different characteristics of the conventional vibroseis with accurately controlled routinely operated signal system(ACROSS),the ACROSS signal was processed by the cross-correlation,short-window correlation,cross-coherence and deconvolution.The comparative analysis on the processing results was carried out from repeatability,travel time profile,spectral characteristics,and signal-to-noise ratio(SNR).The results show that the cross-correlation method is characterized by good stability of processing results and can highlight the high-energy frequency components,but it is not applicable for analysis of the narrow frequency band signal with much difference in power spectral characteristics.There is an overlap in the spectrum of ACROSS signal and the ambient background noise.Short-window correlation can enlarge the role of the noise,and the effect of the processing is less than cross-coherence and deconvolution.The SNR has a great impact on the processing results of cross-coherence and deconvolution.The cross-coherence and deconvolution method are suitable for ACROSS signal detection with a certain SNR.