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中国科学院大学学报 ›› 2012, Vol. ›› Issue (2): 227-233.DOI: 10.7523/j.issn.2095-6134.2012.2.012

• 信息与电子科学 • 上一篇    下一篇

机载单天线SAR动目标检测与参数估计

王艳霞1,2, 张毅1   

  1. 1. 中国科学院电子学研究所, 北京 100190;
    2. 中国科学院研究生院, 北京 100049
  • 收稿日期:2011-02-11 修回日期:2011-04-06 发布日期:2012-03-15
  • 通讯作者: 王艳霞
  • 基金资助:

    国家863计划项目(2009AA7050613)资助 

Moving target indication and parameter estimation based on single-channel aeroborne SAR

WANG Yan-Xia1,2, ZHANG Yi1   

  1. 1. Institute of Electronics, Chinese Academy of Sciences, Beijing 100190, China;
    2. Graduate University, Chinese Academy of Sciences, Beijing 100049, China
  • Received:2011-02-11 Revised:2011-04-06 Published:2012-03-15

摘要:

对机载单天线SAR/GMTI模式下动目标参数估计精度较低的问题进行研究. 首先,用多普勒频移量和距离走动量来估计动目标径向速度,根据估计的结果校正距离走动. 然后,用改进的反射特性位移法来估计动目标的多普勒调频率,在不存在加速度时估计出动目标方位向速度. 这样就可以在进行动目标参数估计的同时实现聚焦成像. 仿真结果验证了该方法的有效性.

关键词: 单天线SAR, 动目标检测, MTI滤波器, 距离走动, 反射特性位移

Abstract:

We have studied the low precision of parameter estimation for the moving target in airborne single antenna SAR/GMTI mode. Firstly, the Doppler shift parameter and range walk parameter are used to estimate the radical velocity of the moving target, and the range walk parameter is corrected with the estimation results. Secondly, the improved reflectivity displacement method algorithm is used to estimate the Doppler frequency rate, and the azimuth velocity can be calculated when there is no acceleration. Thus, parameter estimation and focusing imaging can be completed at the same time. Simulation results show the effectiveness of the proposed method.

Key words: single-channel SAR, moving targets detection, MTI filter, range migration, RDM

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