Layered Media Q Estimation for GPR Signal Processing and the Algorithm of Inverse Q Filtering
详细信息
- 责任者：Zhang Lili (College of GeoExploration Science and Technology ; Jilin University ; Changchun 130026 ; China) ; Liu Sixin
- 刊名：Journal of Jilin University
- 出版年：2011
- 卷期：41(1)
- 关键词：地质雷达 ; geological radar ; Q值 ; Q value ; 滤波 ; filters
- 页码：p.265-270
- 图表：3 illus., 11 refs.
- 分类号：1600
- issnNo：ISSN1671-5888
- isbnNo：CN22-1343/P
摘要
Comparing with traditional GPR method in which it used single Q-factor to describe the attenuation of medium, moreover, the Q-factor of layered medium is determined by getting mean square root Q value using the spectral ratio method. At the same time, the step can be described as follow: the theory of wavefield downward continuation is applied to GPR signals to process the inverse Q filtering data. First, it assumes the underground Q model with multilayer constant Q structure. And then the generalized S inverse transform is done on the results of the filtering to obtain the time-domain signal of the inverse Q filtering. Finally, using this method, the amplitude and phase of three-layer GPR signals attenuation which are synthesized and two-layer GPR signals’ attenuation which are gained though test are compensated, and the result shows that the algorithm is correct and valid in inverse Q filtering of GPR signals.