平面多层媒质中目标的二维衍射层析成像算法

doi:10.3969/j.issn.1001506X.2011.01.16

Journal of Systems Engineering and Electronics ›› 2011, Vol. 33 ›› Issue (1): 79-0083.doi: 10.3969/j.issn.1001506X.2011.01.16

平面多层媒质中目标的二维衍射层析成像算法

雷文太1,2,柳建新2,董健1

1. 中南大学信息科学与工程学院，湖南长沙 410083；
2. 中南大学地球科学与信息物理学院，湖南长沙 410083

出版日期:2011-01-20 发布日期:2010-01-03

Two-dimensional diffraction tomography algorithm of underground objects located in planar multilayer environment

LEI Wen-tai1,2,LIU Jian-xin2,DONG Jian1

1. School of Information Science and Engineering, Central South University, Changsha 410083, China; 
2. School of Geosciences and InfoPhysics, Central South University, Changsha 410083, China)

Online:2011-01-20 Published:2010-01-03

摘要/Abstract

摘要：

探地雷达应用领域中，基于谱域转换处理方法的衍射层析成像算法可以实现对均匀媒质或简单两层媒质中体散射型目标的成像处理，但不适用于两层以上媒质中目标的成像处理。针对这一问题，建立了阵列天线扫描下平面多层媒质中目标体的二维电磁散射模型，通过引入平面多层媒质中格林函数的谱域积分形式，建立了孔径回波信号与目标体函数的谱域对应关系，在此基础上导出了平面多层衍射层析成像算法。通过对多个仿真数据的处理，结果显示该成像算法可有效应用于平面多层媒质中目标的高分辨成像处理。

Abstract:

Based on spectrum transformation procedure, the diffraction tomography (DT) imaging algorithm can achieve volume-scattering object’s imaging results embedded in homogeneous or single layer medium in ground penetrating radar (GPR) applications. But it is not suitable for subsurface targets embedded in multi-layer medium.To solve this problem, a two-dimensional electromagnetic scattering model of targets embedded in planar multilayer environment probing by array antenna is established firstly. Secondly, the spatial spectrum relationship of spatial scattering signals and target’s volume scattering function is founded by introducing the spectrum integral formula of Green function. Based on the above relationship, a planar multilayer diffraction tomography (PML-DT) imaging algorithm is derived subsequently. Through processing simulation data, PML-DT imaging results show that the algorithm can be applied effectively at the aspect of target imaging embedded in planar multilayer environment.

雷文太,柳建新,董健. 平面多层媒质中目标的二维衍射层析成像算法[J]. Journal of Systems Engineering and Electronics, 2011, 33(1): 79-0083.

LEI Wen-tai,LIU Jian-xin,DONG Jian. Two-dimensional diffraction tomography algorithm of underground objects located in planar multilayer environment[J]. Journal of Systems Engineering and Electronics, 2011, 33(1): 79-0083.

平面多层媒质中目标的二维衍射层析成像算法

Two-dimensional diffraction tomography algorithm of underground objects located in planar multilayer environment

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