SAR IMAGING OF SUICIDE BOMBERS WEARING CONCEALED EXPLOSIVE THREATS
SAR IMAGING OF SUICIDE BOMBERS WEARING CONCEALED EXPLOSIVE THREATS
复制标题
佩戴隐蔽爆炸威胁的自杀式炸弹袭击者的 SAR 成像
DOI：
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发表时间：
2012
期刊：
影响因子：
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通讯作者：
C. Rappaport
中科院分区：
文献类型：
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作者：
J. Martinez;F. Quivira;C. Rappaport
本文研究了穿戴隐蔽金属和电介质物体的潜在自杀式爆炸者的探测问题。毫米波雷达系统采用多频多发射机多接收机配置（MF-MTMR），其产生的数据由基于有限差分频域（FDFD）方法的电磁码合成生成。数值代码提供了由受测对象产生的散射场，该散射场随后通过使用多基地合成孔径雷达（SAR）算法进行处理。该方法利用正则化反卷积算法消除了SAR图像中点扩展函数（PSF）产生的模糊效应，该算法只使用幅度信息（不使用相位信息）。最后，SAR算法和反卷积程序进行了测试，一个人穿着金属和介电体的对象。介质棒的SAR响应与金属管道的SAR响应有很大的不同。我们的算法不仅区分情况，但也能够估计的杆的介电常数。每个本构参数直接映射到炸药化合物，如TNT或RDX的介电常数，使潜在的自杀炸弹手的检测成为可能。
This paper deals with the problem of detecting potential suicide bombers wearing concealed metallic and dielectric objects. The data produced by Millimeter-Wave-Radar system, working on a Mulptiple Frequency-Multiple Transmitters and Multiple Receivers configuration (MF-MTMR), is synthetically generated by an electromagnetic code based on Finite Differences Frequency Domain (FDFD) method. The numerical code provides the scattered field produced by the subject under test, which is later processed by using a multiple bistatic Synthetic Aperture Radar (SAR) algorithm. The blurring effect produced by the Point Spread Function (PSF) in the SAR image is removed by applying a regularized deconvolution algorithm that uses only magnitude information (no phase). Finally, the SAR algorithm and the deconvolution procedure are tested on a person wearing metallic and dielectric objects. The SAR response of dielectric rods is quite different from the metallic pipes. Our algorithm not only distinguishes between cases but also is capable of estimating the dielectric constant of the rods. Each constitutive parameter directly maps to the dielectric constant of explosive compounds, such as TNT or RDX, making feasible the detection of potential suicide bombers.