表层穿透雷达递归反向投影成像算法  

Surface Penetrating Radar Recursive Back Projection Imaging Algorithm

作　　者：雷文太[1] 粟毅[1] 黄春琳[1] 

机构地区：[1]国防科技大学电子科学与工程学院,湖南长沙410073

出　　处：《电子学报》2005年第12期2115-2119,共5页Acta Electronica Sinica

基　　金：国家高技术研究发展计划(863计划)课题(No.2001AA132020)

摘　　要：本文提出了一种冲激脉冲表层穿透雷达(Impulse Surface Penetrating Radar,简称ImpSPR)递归反向投影(Back Projection,简称BP)成像算法.ImpSPR应用中,高精度实时成像是进行表层下目标探测最直接和有效的手段.基于“延迟-求和”处理的时域BP成像算法可以对成像区域完成精确聚焦,得到高质量的雷达图像.然而由于其巨大的运算量,难以应用于ImpSPR系统的实时处理中.本文在对BP算法详细分析的基础上,建立了算法的递归模型,导出了递归BP算法的处理流程并对其运算量进行了分析.ImpSPR实测数据处理结果表明,递归BP成像方法可以大大降低运算量,有效的运用于ImpSPR系统实时处理中,同时也可用于机载合成孔径雷达系统.A recursive back projecfion（BP） imaging algorithm is presented. Real time imaging is an intense demand but a challenging task in impulse surface penetrating mdar（ImpSPR）＇ s apphcation. Based on ＇delay-sum＇ operation in time domain, BP imaging algorithm can precisely focus scattering intensity and obtain high quality subsurface profile. But its heavy computation load restricts its application in ImpSPR＇ s real time processing.After analyzing BP imaging procedttre,a recursive model of this imaging algorithm is estabhshed and recursive BP imaging algorithm is educed subsequently. The computation complexity of both original BP imag- ing algorithm and recursive BP imaging algorithm are analyzed. Through processing experimental data obtained by a ImpSPR system- RadarEye, the recursive BP imaging algorithm validate its capability at the aspect of ImpSPR＇ s real time processing.

关 键 词：冲激脉冲表层穿透雷达 反向投影 实时成像 

分 类 号：TN957.522[电子电信—信号与信息处理]