离散调频-傅里叶变换及其在雷达成像中的应用  

Discrete Chirp-Fourier Transform and Its Applications in Radar Imaging

作　　者：王小宁[1] 许家栋[2] 

机构地区：[1]西北大学,陕西西安710069 [2]西北工业大学,陕西西安710072

出　　处：《系统工程与电子技术》2002年第3期14-15,51,共3页Systems Engineering and Electronics

摘　　要：介绍了离散调频 -傅里叶变换 (DCFT) ,提出了把离散调频 -傅里叶变换应用于雷达成像的思想 ,此方法可代替傅里叶变换进行多普勒处理 ,若目标回波中有二次相位 ,则可免去对目标回波中的二次相位的运动补偿 ,得到高分辨率的雷达成像。以仿真点目标为例对此方法与直接傅里叶变换法进行了比较 。In this paper discrete Chirp-Fourier transform(DCFT) is introduced and the idea of DCFT for radar imaging is presented DCFT can be used to replace the Fourier transform for Doppler processing. There is no need to perform motion compensation to achieve radar imaging of high resolution even if the target echo contains quadratic phase. The method is compared with the Fourier transform by using point target model. The results show that it is effective to obtain clear images of the target.

关 键 词：离散调频-傅里叶变换 二次相位 雷达成像 多普勒处理 

分 类 号：TN957.52[电子电信—信号与信息处理]