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基于矩阵束方法的星载MEB SAR俯仰向DBF处理方法

叶恺 禹卫东 王伟

叶恺, 禹卫东, 王伟. 基于矩阵束方法的星载MEB SAR俯仰向DBF处理方法[J]. 电子与信息学报, 2018, 40(11): 2659-2666. doi: 10.11999/JEIT180076
引用本文: 叶恺, 禹卫东, 王伟. 基于矩阵束方法的星载MEB SAR俯仰向DBF处理方法[J]. 电子与信息学报, 2018, 40(11): 2659-2666. doi: 10.11999/JEIT180076
Kai YE, Weidong YU, Wei WANG. Matrix Pencil Method Based Processing Approach for Spaceborne MEB SAR with Digital Beamforming in Elevation[J]. Journal of Electronics & Information Technology, 2018, 40(11): 2659-2666. doi: 10.11999/JEIT180076
Citation: Kai YE, Weidong YU, Wei WANG. Matrix Pencil Method Based Processing Approach for Spaceborne MEB SAR with Digital Beamforming in Elevation[J]. Journal of Electronics & Information Technology, 2018, 40(11): 2659-2666. doi: 10.11999/JEIT180076

基于矩阵束方法的星载MEB SAR俯仰向DBF处理方法

doi: 10.11999/JEIT180076
基金项目: 国家重点研发计划(2017YFB0502700),国家自然科学基金(61701479)
详细信息
    作者简介:

    叶恺:男,1988年生,博士生,研究方向为新体制星载SAR系统设计和信号处理

    禹卫东:男,1969年生,研究员,博士生导师,研究方向为合成孔径雷达系统设计和信号处理

    王伟:男,1985年生,博士生,研究方向为新体制星载SAR系统设计和信号处理

    通讯作者:

    叶恺  yekai_seven@hotmail.com

  • 中图分类号: TN959.74

Matrix Pencil Method Based Processing Approach for Spaceborne MEB SAR with Digital Beamforming in Elevation

Funds: The National Key Research and Development Project of China (2017YFB0502700), The National Natural Science Foundation of China (61701479)
  • 摘要: 俯仰向数字波束形成(DBF)处理是距离向多波束体制(MEB)星载合成孔径雷达(SAR)系统实现较高分辨率、超宽幅成像的关键。但是,由于存在卫星姿态误差等因素的影响,星载MEB SAR系统的DBF接收波束指向会出现偏差,这将导致在对具有强散射体的区域(如存在船舶的海面、港口等区域)进行成像时会出现鬼影目标。针对这一问题,该文提出一种基于矩阵束方法的俯仰向DBF处理方法。首先对俯仰向通道回波数据进行匹配滤波处理,并根据预设阈值寻找强散射体的峰值位置;然后利用矩阵束方法准确估计强散射体的波达角;最后利用这些信息调整俯仰向DBF加权矢量,确保DBF接收波束指向正确,从而消除鬼影目标的干扰。仿真实验验证了该方法的有效性。
  • 图  1  星载MEB SAR成像几何模型

    图  2  星载MEB SAR俯仰向DBF处理示意图

    图  4  目标P2的波达角估计值偏差

    图  3  点目标仿真结果

    图  5  分布目标仿真结果

    表  1  系统仿真参数

    轨道高度 700 km
    卫星速度 7504 m/s
    载频 5.4 GHz
    信号带宽 60 MHz
    脉冲宽度 22 μs
    天线高度 1.5 m
    俯仰向子孔径数目 23
    天线长度 10 m
    脉冲重复频率 1800 Hz
    下载: 导出CSV
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出版历程
  • 收稿日期:  2018-01-19
  • 修回日期:  2018-05-10
  • 网络出版日期:  2018-08-14
  • 刊出日期:  2018-11-01

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