系统工程与电子技术

• 传感器与信号处理 • 上一篇    下一篇

基于距离徙动轨迹的空间目标ISAR距离对准算法

俞翔1,2, 朱岱寅2, 李俊强3, 云涛3, 黄翔飞2   

  1. 1. 南京工程学院计算机工程学院, 江苏 南京 211167; 2. 南京航空航天大学电子信息工程学院, 江苏 南京 210016; 3. 中国人民解放军63778部队, 黑龙江 佳木斯 154002
  • 出版日期:2017-03-23 发布日期:2010-01-03

Range alignment algorithm based on the range migration trajectory for the space target ISAR

YU Xiang1,2, ZHU Daiyin2, LI Junqiang3, YUN Tao3, HUANG Xiangfei2   

  1. 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; 3. Unit 63778 of the PLA, Jiamusi 154002, China
  • Online:2017-03-23 Published:2010-01-03

摘要:

针对空间目标的运动特征,通过研究目标距离徙动轨迹与等效运动模型,构建了一个欠定的运动方程组,基于全局熵最优化准则求解出目标运动参数,提出了一种全新的距离对准算法。实验结果表明,该算法具有较高的准确性,更重要的是,距离对准过程中不会引入距离像随机偏移误差和高频相位误差,这也是应用大转角高分辨成像方法的前提条件。

Abstract:

Aiming at the motion feature of the space and near space target, by studying the range migration trajectory and the equivalent motion model, a novel range alignment algorithm is put forword, which is based on the global entropy optimization criterion for solving underdetermined equations. Simulation and experimental results show that it is an efficient algorithm. More important, the random offset error and the high frequency phase error are not introduced, which is the precondition of applying the high resolution imaging method.