基于FRFT的FMCW SAR成像  

FMCW SAR Imaging based on Fractional Fourier Transformation

作　　者：曲长文[1] 王颖[1,2] 黄宇[1] 邓兵[1] 

机构地区：[1]海军航空工程学院 [2]解放军63891部队

出　　处：《火力与指挥控制》2010年第6期43-45,共3页Fire Control & Command Control

基　　金：中国博士后科学基金资助项目(2005037772)

摘　　要：调频连续波合成孔径雷达(FMCW SAR)结合调频连续波与合成孔径成像技术,具有体积小、重量轻、成本低、分辨率高等一系列优点,是新近提出来的一种成像雷达体制。由于FMCW SAR的差频信号在方位向可以转化为调频信号,据此提出了一种基于分数阶傅立叶变换(FRFT)的FMCW SAR成像算法。仿真结果表明,该算法与RD算法相比较,方位向主瓣压缩和旁瓣抑制效果非常明显。The frequency modulated continuous wave synthetic aperture radar（FMCW SAR） is a newly proposed radar imaging system,which combining FMCW technique with synthetic aperture imaging methods has the advantages such as small cubage,light weight,cost-effective,high-resolution,etc.Because the beat frequency signal of the FMCW SAR can be turn to chirp signal in azimuth direction.A new FMCW SAR imaging algorithm based on fractional Fourier transformation （FRFT） is presented.Compared with RD algorithm,the simulation results show that this algorithm significantly improves azimuth resolution width and sidelobe level.

关 键 词：调频连续波合成孔径雷达 分数阶傅立叶变换 调频信号 方位分辨率 

分 类 号：TN958[电子电信—信号与信息处理]