Diffraction tomographic algorithm for the detection of three-dimensional objects buried in a lossy half-space

被引：94
|
作者：
Cui, TJ [1 ]
Chew, WC [1 ]
机构：
[1] Univ Illinois, Dept Elect & Comp Engn, Ctr Computat Electromagnet, Urbana, IL 61801 USA
来源：
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION | 2002年 / 50卷 / 01期
基金：
美国国家科学基金会;
关键词：
detection of objects; diffraction tomography (DT); generalized fourier transform; Green's functions; inverse scattering; lossy earth; Sommerfeld integrals;
D O I：
10.1109/8.992560
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
A diffraction, tomographic (DT) algorithm has been proposed for detecting three-dimensional (3-D) dielectric objects buried in a lossy ground, using electric dipoles or magnetic dipoles as transmitter and receiver, where the air-earth interface has been taken into account and the background is lossy. To derive closed-form reconstruction formulas, an approximate generalized Fourier transform is introduced. Using this algorithm, the locations, shapes, and dielectric properties of buried objects can be well reconstructed tinder the low-contrast condition, and the objects can be well detected even when the contrast is high. Due to the use of fast Fourier transforms to implement the problem, the proposed algorithm is fast and quite tolerant to the error of measurement data, making it possible to solve realistic problems. Reconstruction examples are given to show the validity of the algorithm.
引用
收藏
页码：42 / 49
页数：8
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