›› 2011, Vol. 31 ›› Issue (2): 58-63.doi: 10.3780/j.issn.1000-758X.2011.02.010

• 技术交流 • 上一篇    下一篇

星载三通道SAR/DPCA误差分析与动目标定位方法

夏猛1, 杨小牛2   

  1. (1 西安电子科技大学通信工程学院,西安 710071) (2 通信系统信息控制技术国家重点实验室,嘉兴 314003)
  • 收稿日期:2010-09-14 修回日期:2010-12-06 出版日期:2011-04-25 发布日期:2011-04-25
  • 作者简介:夏 猛 1981年生,2007年获西安电子科技大学信号与信息处理硕士学位,现为西安电子科技大学信息与通信工程专业博士研究生。研究方向为软件无线电技术、星载SAR-GMTI。

Error Analysis and Moving Target Position for Spaceborne SAR-DPCA with Three-channel

 XIA  Meng1, YANG  Xiao-Niu2   

  1. (1 School of Communication Engineering, Xidian University, Xi′an 710071)(2 National Key Laboratory of Information Control Technology for Communication System,Jiaxing 314003)
  • Received:2010-09-14 Revised:2010-12-06 Online:2011-04-25 Published:2011-04-25

摘要: 针对一发三收模式下星载SAR-GMTI系统利用相位中心偏置天线(DPCA)方法进行杂波抑制时,系统误差和平台运动误差引起的杂波残留问题,提出了一种基于误差补偿的运动目标检测和定位新方法。分析了误差存在的原因,并以消除剩余杂波为目的详细推导出了相应的补偿因子,在此基础上对经过误差补偿后的数据采用DPCA方法进行杂波抑制,最后通过相位干涉处理进行动目标定位。仿真结果验证了算法的有效性。

关键词: 合成孔径雷达, 相位中心偏置天线, 误差分析, 杂波抑制, 航天器

Abstract: For residual clutter caused by system errors and motion errors in spaceborne SAR-GMTI with three channel when using displaced phase center antenna(DPCA) technology to suppress clutter, a novel method of detection and position for moving target was presented based on error compensation. Aiming at elimination of residual clutter, errors were analyzed in detail and corresponding compensation functions were derived. After compensation, DPCA and interferometric processing were applied to cultter suppression and moving target position.

Key words: Synthetic-apterture radar, Diplaced phase center antenna, Error analysis, Clutter suppression, Spacecraft