ISAR成像的数据预处理  

Pre-processing of Data in ISAR Imaging

作　　者：季承[1] 李士国[1] 

机构地区：[1]南京电子技术研究所,南京210013

出　　处：《现代雷达》2009年第6期27-31,共5页Modern Radar

摘　　要：在ISAR成像中,成像数据通常都是按顺序从回波数据中选取,方位分辨率和成像质量也是根据经验来控制。由于ISAR成像的目标是非合作的,很难得到统一的方位分辨率,同时成像的质量和成像的效率也不能达到最佳,因此对成像前的数据进行预处理非常重要。文中提出了一种预处理方法,通过预处理使方位分辨率自动达到所要求的方位分辨率。并根据数据质量自动选择平稳成像算法或机动目标成像算法。仿真表明,通过预处理,成像的效率和成像的质量都能达到很大的提高。In ISAR imaging, the data for imaging is always being selected sequentially from radar echo data and the azimuth resolution and imaging quality is controlled by experience. Due to the non-cooperation of target, it is difficuh to get a uniform azimuth resolution, and also optimal result in imaging quality and efficiency can not be got. So it is important to process the received data before using them for imaging. In this paper, a method that can process received data and let them automatically reach the required azimuth resolution is proposed. Then according to the quality of the data, smooth imaging algorithm or maneuvering target imaging algorithm will be chosen automatically to get the target image. Simulation results show that, through pre-processing the imaging efficiency and quality both are greatly improved.

关 键 词：逆合成孔径雷达 成像 预处理 方位分辨率 机动性 

分 类 号：TN958[电子电信—信号与信息处理] TN957.2[电子电信—信息与通信工程]