基于小波变换的一种ISAR雷达目标成像方法  

A Method of ISAR Imaging Based on Wavelet Transform

作　　者：张善文[1] 甄蜀春[1] 赵兴录[1] 赵栓堂[2] 

机构地区：[1]空军工程大学导弹学院,三原713800 [2]中国飞行实验研究院,阎良710089

出　　处：《现代雷达》2001年第6期22-24,共3页Modern Radar

基　　金：国防科技预研基金项目 (编号 :99J1;4;1JB2 0 0 4 )

摘　　要：基于小波变换的性质 ,提出了一种 ISAR雷达目标成像方法。通过对 ISAR回波的横向数据进行Morlet小波变换 ,搜索小波变换模的极大值和对应的极大值点 ,得到目标的时间—距离—多普勒三维像 ,然后按时间点进行采样 ,得到目标的距离—瞬时多普勒像。由实验结果得出 :运用此方法 ,不仅能够得到目标高分辨的距离—瞬时多普勒像 。Based on the properties of wavelet transform, a method of ISAR imaging is proposed in this paper. The time range Dopper image of a target is obtained by processing transversal data extracted from ISAR target echoes with Morlet wavelet transform and finding local maximum of wavelet transform modulus and its location. Then the range temporal Doppler image is obtained by sampling time. The experimental results by using the method proved that not only the radar target high resolution image can be obtained, but also the motion of target can be observed.

关 键 词：逆合成孔径雷达 距离-多普勒像 距离-瞬时多普勒像 小波变换 

分 类 号：TN957.524[电子电信—信号与信息处理]