探地雷达中的衍射层析算法  

Diffraction Tomography Algorithm for Ground Penetrating Radar

作　　者：刘立业[1] 雷文太[1] 粟毅[1] 毛钧杰[1] 

机构地区：[1]国防科学技术大学电子科学与工程学院,湖南长沙410073

出　　处：《雷达科学与技术》2005年第4期207-211,共5页Radar Science and Technology

基　　金：国家863高科技计划项目(No.2001AA132020)

摘　　要：给出了二维情况下进行地下目标反演的线性衍射层析算法。该方法采用线性Born近似和傅里叶变换,避免了一般非线性逆散射算法的逐步迭代,因而可用于地下目标的快速检测和位置标定。本文的衍射层析算法考虑了空气-地面交界面的影响并计入了凋落场。计算结果表明,该方法可以较好地描述低对比度目标的位置、轮廓和介电参数等信息,也可用于高对比度目标的检测和定位。A 2D diffraction tomography algorithm for ground penetrating radar is presented in this paper. The algorithm is based on Born approximation and Fourier transform, and avoids the iterative calculation in the nonlinear inverse scatting algorithm. So the buried objects can be detected and located rapidly. The effect of air-earth interface has been taken into account in the algorithm in the paper. The simulation results show that the locations, shapes, and dielectric properties of buried objects can be reconstructed for low-contrast and deep condition. The algorithm can also be applied to detect the high-contrast and shallow buried objects.

关 键 词：探地雷达 逆散射 衍射层析算法 

分 类 号：TN959[电子电信—信号与信息处理]