海上舰船目标HRRP特性仿真  

Simulation of HRRP characteristics for maritime ship targets

作　　者：余定峰[1] 陈谦[2] 姚菁晶[1] 何思远[1] 朱国强[1] 胡卫东[3] 

机构地区：[1]武汉大学电子信息学院,湖北武汉430079 [2]武汉大学城市设计学院,湖北武汉430072 [3]国防科学技术大学ATR重点实验室,湖南长沙410073

出　　处：《系统工程与电子技术》2010年第12期2552-2556,共5页Systems Engineering and Electronics

基　　金：国家自然科学基金(61001059);国家高技术研究发展计划(863计划)(2007AA12Z172);中央高校基本科研业务费专项资金资助课题

摘　　要：系统地介绍了海上舰船目标高频仿真及雷达成像的完整解决方案。对海上舰船进行高精度三维几何建模,采用步进频率信号雷达波照射,基于物理光学(physical optics,PO)双次反弹的高频方法结合增量长度绕射系数(incremental length diffraction coefficients,ILDC)理论计算了复合目标的宽带后向散射场。在频域对回波数据作离散傅里叶逆变换,得到宽带信号的时域响应,从而得到高分辨率距离像(high resolution range profiles,HRRP)和二维聚束合成孔径雷达(synthetic aperture radar,SAR)成像。在给出的算例中,借助射线理论分析了海上舰船目标的距离像特性及其成像机理,验证了仿真结果的准确性和有效性。A complete solution of high-frequency simulation and radar imaging for the maritime ship target is proposed.The high-precision three-dimensional geometric modeling of the maritime ship is performed,and the broadband backscattered field of the combined model is obtained by a high-frequency method based on physical optics（PO） with double bounce and incremental length diffraction coefficients（ILDC） theory,using a stepped frequency waveform.By performing an inverse discrete Fourier transform on the backscattered field data in the frequency domain,the time domain response is provided for the wide-band signal.Accordingly,the high resolution range profile（HRRP） and 2-D spotlight SAR image are obtained.Range characteristics and imaging mechanism are analyzed by means of the ray theory in several examples,which may verify the accuracy and effectiveness of the simulation results.

关 键 词：散射 距离像 双次反弹的物理光学 海上舰船目标 

分 类 号：TM15[电气工程—电工理论与新技术]