一种反演地下介质参数的新算法
doi: 10.3724/SP.J.1146.2007.01642
A New Algorithm for Underground Medium Parameters Inversion
-
摘要: 在探地雷达实际工程应用中,介质参数(主要是介电常数)是使用者正确定位地下目标深度或介质层厚度所必需的数据。该文提出一种基于MUSIC谱估计的地下介质参数反演算法,该算法通过对LFMCW GPR回波信号的时延和幅度估计,计算出精确的介质参数并进一步得到正确的地下介质结构。仿真结果表明:该文提出的反演算法在反演精确度上远远优于传统的电磁反演算法。Abstract: When Ground Penetrating Radar is applied in actual projects, medium parameter (the permittivity is main) is a necessary data for users to position the depth of underground targets and the thickness of medium layers correctly. An inversion algorithm for underground medium parameter estimation based on MUSIC spectrum estimation is put forward in this paper. After estimating the time delay and amplitude of LFMCW GPR echo, the accurate medium parameter is worked out and then the right medium structure underground is gotten in succession. The simulating results show that the new algorithm improves much on the precision comparing with traditional electromagnetism inversion algorithms.
-
李大心. 探地雷达方法与应用. 北京: 地质出版社, 1994:110-150.[2]Srinivasamurthy V. Model based signal processing algorithmfor MIDP GPR [D]. Information and TelecommunicationTechnology Center, The University of Kansas, June 2005.[3]Spagnolini U. Permittivity measurements of multilayeredmedia with monostatic pulse radar[J].IEEE Trans. onGeoscience and Remote Sensing.1997, 35(2):454-463[4]飞思科技产品研发中心. MATLAB 6.5 辅助优化计算与设计.北京: 电子工业出版社, 2003, 1: 79-116.[5]胡广书. 数字信号处理理论、算法与实现. 北京: 清华大学出版社, 2003, 8: 564-568.[6]Urazghildiiev I, Ragnarsson R, and Rydberg A. Highresolutionestimation of ranges using multiple-frequency CWradar[J].IEEE Trans. on Intelligent Transportation Systems.2007, 8(2):332-339[7]王永良, 陈辉, 彭应宁, 万群. 空间谱估计理论与算法. 北京:清华大学出版社, 2004: 98-105.[8]刘德树, 罗景青, 张剑云. 空间谱估计及其应用. 合肥: 中国科学技术大学出版社, 1997, 8: 120-127.[9]徐伯勋, 白旭滨, 于常青. 信号处理及应用. 北京: 地质出版社,1997, 3: 138-139.
计量
- 文章访问数: 3377
- HTML全文浏览量: 107
- PDF下载量: 935
- 被引次数: 0