首页 | 本学科首页   官方微博 | 高级检索  
     

基于距离徙动轨迹的空间目标ISAR联合运动补偿算法
引用本文:俞翔,朱岱寅,毛新华.基于距离徙动轨迹的空间目标ISAR联合运动补偿算法[J].数据采集与处理,2018,33(4):683-691.
作者姓名:俞翔  朱岱寅  毛新华
作者单位:1. 南京工程学院计算机工程学院, 南京, 211167;2. 南京航空航天大学电子信息工程学院, 南京, 210016
基金项目:国家自然科学基金(61671240)资助项目;江苏省自然科学基金青年基金(BK20150730)资助项目;南京工程学院人才引进科研启动基金(YKJ201424)资助项目;江苏省产学研联合创新资金前瞻性研究(BY2014003-05)资助项目。
摘    要:针对空间高速运动目标的运动特征,分析目标距离徙动轨迹(Range migration trajectory,RMT)与等效运动模型,提出了一种基于距离徙动轨迹的联合运动补偿算法。该算法依据距离像全局熵值最小化原则,从RMT中估计出目标的平动参数,根据平动参数分别补偿距离像偏移并校正一维距离像畸变,从而实现对空间目标回波的距离对齐和脉内走动的联合平动补偿。仿真和实测数据处理结果表明该算法准确性较高,更重要的是,距离对齐步骤不会引入随机偏移误差和相位误差,这也是应用高分辨成像方法的前提条件。

关 键 词:逆合成孔径雷达  距离徙动轨迹  空间目标  联合运动补偿
收稿时间:2016/10/4 0:00:00
修稿时间:2017/2/23 0:00:00

ISAR Joint Motion Compensation Algorithm Based on Range Migration Trajectory for Space Target
Yu Xiang,Zhu Daiyin,Mao Xinhua.ISAR Joint Motion Compensation Algorithm Based on Range Migration Trajectory for Space Target[J].Journal of Data Acquisition & Processing,2018,33(4):683-691.
Authors:Yu Xiang  Zhu Daiyin  Mao Xinhua
Affiliation:1. Department of Computer Engineering, Nanjing Institute of Technology, Nanjing, 211167, China;2. College of Electronic and Information Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, 210016, China
Abstract:Aiming at the motion features of high speed moving target in space, by analyzing the range migration trajectory (RMT) and the equivalent motion model of the target, a RMT-based joint motion compensation algorithm is proposed in this paper. In the algorithm, the translational parameters of the target are estimated from RMT according to the global entropy minimization principle. Then the range profile offset is compensated and one dimensional range alignment distortion is corrected by using these translational parameters, which can realize the joint motion compensation of range alignment and intra pulse moving for the space target echo. Simulational and experimental results show that the proposed algorithm has high accuracy. What''s more, ransom offset error and phase error cannot be introduced in the range alignment procedure, which is the precondition of high-resolution imaging method application.
Keywords:inverse synthetic aperture radar (ISAR)  range migration trajectory  space target  joint motion compensation
点击此处可从《数据采集与处理》浏览原始摘要信息
点击此处可从《数据采集与处理》下载全文
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号