基于时频分析的ISAR成像  

The ISAR imaging based on time-frequency analysis

作　　者：彭军[1] 王光明[1] 刘丹[2] 

机构地区：[1]空军工程大学导弹学院,陕西三原713800 [2]北京无线电测量研究所,北京100854

出　　处：《雷达与对抗》2008年第1期30-33,共4页Radar & ECM

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,对机动目标的成像会导致成像模糊。本文应用短时傅里叶变换(STFT)、魏格纳分布(WVD)、平滑伪魏格纳分布(SPWVD)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,通过该方法能得到清晰的目标的距离-瞬时多普勒像。The Fourier transform used by conventional ISAR imaging to retrieve Doppler information will cause image blur for the targets with complex motion. In this paper, the application of the joint time-frequency transform which incorporates STFF, WVD and SPWVD in ISAR instantaneous imaging for maneuvering target is studied. The simulation data and real test data prove that with this method clear radar instantaneous images of maneuvering targets can be achieved.

关 键 词：逆合成孔径雷达 机动目标 时频分析 瞬时成像 

分 类 号：TN958[电子电信—信号与信息处理]