基于级数反演的俯冲加速运动状态弹载SAR成像算法  

Imaging algorithm for missile-borne SAR with diving acceleration based on series reversion

作　　者：易予生[1] 张林让[1] 刘楠[1] 刘昕[1] 申东[1] 

机构地区：[1]西安电子科技大学雷达信号处理国家重点实验室,陕西西安710071

出　　处：《系统工程与电子技术》2009年第12期2863-2866,共4页Systems Engineering and Electronics

基　　金：国家自然科学基金(60672130);国家重点实验室基金(0303072209)资助课题

摘　　要：根据弹载合成孔径雷达(synthetic aperture radar,SAR)俯冲加速运动的特点,使用高阶逼近模型建立了SAR的回波信号模型,分析了目标斜距在单个孔径时间内随时间的变化关系。结合级数反演的思想,推导出了弹载SAR回波信号的二维频域的精确表达式。在此基础上,提出了一种适用于俯冲加速运动下的弹载SAR成像算法。理论分析和实验结果表明,该算法精度较高,取得了较好的成像效果。In the missile-borne SAR working mode,there will be a strong coupling between range signal and azimuth signal. The echo model of the missile-borne SAR is established by using a fourth order range model, and the two-dimensional point target spectrum is derived by the method of series reversion, followed the corresponding range and azimuth match filtering functions are provided for motion compensation. The point target simulation results are presented to demonstrate the accuracy and validity of the proposed algorithm.

关 键 词：合成孔径雷达 弹载 俯冲加速运动 级数反演 运动补偿 

分 类 号：TN957.51[电子电信—信号与信息处理]