基于SVA算法和时频分析的ISAR成像  

ISAR Imaging Based on SVA and Time Frequency Analysis

作　　者：费智婷[1] 丁东涛[1] 付毓生[1] 皮亦鸣[1] 

机构地区：[1]电子科技大学电子工程学院,成都610054

出　　处：《现代雷达》2007年第2期52-55,共4页Modern Radar

基　　金：国家电子对抗重点实验室基金资助

摘　　要：研究了时频分析在ISAR成像中的运用,论述了一维SVA算法和改进的二维SVA算法在提高图像分辨率、降低信号自身旁瓣电平方面的优势。在此基础上,提出将两者联合运用到机动目标的逆合成孔径雷达成像中,改善了传统的距离-多普勒算法对机动目标成像的模糊现象。实验结果证明了此方法的正确性和有效性。The application of time-frequency analysis to ISAR imaging is discussed in this paper. Spatially variant apedization in one dimension and two dimensions are introduced to significantly reduce sidelobe levels without degrading mainlobe resolution. Combination of the SVA and time-frequency analysis in ISAR imaging of the maneuvering target is proposed to improve imaging quality of the traditional RD algorithm. Simulation data demonstrate this method can get good ISAR imaging for maneuvering targets.

关 键 词：逆合成孔径雷达 SVA算法 时频分析 分辨率 旁瓣抑制 

分 类 号：TN958[电子电信—信号与信息处理] TN957.51[电子电信—信息与通信工程]