旋转对称目标双基地一维距离像特性分析  

Characteristic of Bistatic High-range Resolution Profiles of Rotational Symmetry Targets

作　　者：艾小锋[1] 邹小海[1] 李永祯[1] 杨建华[1] 肖顺平[1] 

机构地区：[1]国防科学技术大学电子科学与工程学院,长沙410073

出　　处：《电子与信息学报》2011年第11期2727-2734,共8页Journal of Electronics & Information Technology

基　　金：国家自然科学基金青年科学基金(60802078)资助课题

摘　　要：双基地雷达成像研究中通常直接采用了单基地散射中心模型,忽略了双基地几何配置引起散射中心位置变化的这一事实。该文研究了旋转对称目标的双基地散射特性,采用几何绕射理论求解了锥体目标底面边缘双基地散射中心的位置,为入射波方向与散射波方向的夹角角平分线与目标对称轴构成的平面与底面边缘的交点,并据此建立了宽带双基地雷达目标回波模型,进而获得双基地1维距离像。最后,通过电磁计算软件获得了锥体目标的双基地1维距离像,计算结果与理论分析相一致,证明了理论分析的正确性。该文揭示的目标双基地散射中心的位置为旋转对称目标的宽带双基地雷达回波模拟、成像、特征提取与识别等应用提供了准确的数学模型。The bistatic scattering centres are usually modeled as the monostatic scattering centres,however,the fact that the location of the scattering centre changes with the bistatic configuration is ignored.This paper focuses on the bistatic scattering characteristic of a rotational symmetry cone-shaped target.Firstly,the locations of the bistatic scattering centres on the edge of the undersurface are deduced with the method of the equivalent currents,where are the points of intersection of the edge of the undersurface and the plane constructed by the symmetry axis and the bisector of the bistatic angle.Then,based on the above conclusion,the wideband bistatic echo model of this target is deduced and the theoretical bistatic High-Range Resolution Profile（HRRP） is constructed.Finally,the bistatic HRRPs of a cone-shaped target are calculated via the Feko software and the calculated bistatic HRRPs keep consilient with the theoretical bistatic HRRPs,which validates the theoretical deduction.The location of the bistatic scattering centres revealed in this paper will provide an exact mathematics model for the wideband echo simulation,imaging,feature extraction and Automatic Target Recognition（ATR） of the rotational symmetry target in the bistatic radar.

关 键 词：双基地雷达 高分辨距离像 旋转对称目标 散射中心 

分 类 号：TN957.52[电子电信—信号与信息处理]