基于时频分析的ISAR成像  

ISAR imaging based on time-frequency analysis

作　　者：彭军[1] 王光明[1] 刘丹[2] 袁昊天[2] 

机构地区：[1]空军工程大学导弹学院,陕西三原713800 [2]中国航天科工集团公司二院23所,北京100854

出　　处：《航天电子对抗》2008年第2期31-33,共3页Aerospace Electronic Warfare

摘　　要：传统的逆合成孔径雷达(ISAR)成像算法用傅里叶变换进行频谱分析,会导致对机动目标的成像模糊。应用短时傅立叶变换(STFT)、魏格纳分布(WVD)、平滑伪魏格纳分布(SPWVD)等几种时频分析方法对机动目标进行瞬时成像,仿真和实验结果表明,应用该方法能得到清晰的目标的距离-瞬时多普勒像。Conventional ISAR imaging uses the Fourier transform to retrieve Doppler information. Due to the complex motion of a target,the image is blurred. The application of joint time-frequency transform,ineluding STFT,WVD and SPWVD,in ISAR temporal imaging for maneuvering targets is studied. Simulation data and real data prove that the method can get good radar temporal images for maneuvering targets.

关 键 词：逆合成孔径雷达 机动目标 时频分析 瞬时像 

分 类 号：TN958[电子电信—信号与信息处理]