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大斜视直升机载太赫兹ViSAR振动补偿成像算法

孙伟 孙进平 张远 张耀天

孙伟, 孙进平, 张远, 等 . 大斜视直升机载太赫兹ViSAR振动补偿成像算法[J]. 北京航空航天大学学报, 2016, 42(12): 2755-2761. doi: 10.13700/j.bh.1001-5965.2015.0862
引用本文: 孙伟, 孙进平, 张远, 等 . 大斜视直升机载太赫兹ViSAR振动补偿成像算法[J]. 北京航空航天大学学报, 2016, 42(12): 2755-2761. doi: 10.13700/j.bh.1001-5965.2015.0862
SUN Wei, SUN Jinping, ZHANG Yuan, et al. High squint helicopter-borne terahertz ViSAR vibration compensation imaging algorithm[J]. Journal of Beijing University of Aeronautics and Astronautics, 2016, 42(12): 2755-2761. doi: 10.13700/j.bh.1001-5965.2015.0862(in Chinese)
Citation: SUN Wei, SUN Jinping, ZHANG Yuan, et al. High squint helicopter-borne terahertz ViSAR vibration compensation imaging algorithm[J]. Journal of Beijing University of Aeronautics and Astronautics, 2016, 42(12): 2755-2761. doi: 10.13700/j.bh.1001-5965.2015.0862(in Chinese)

大斜视直升机载太赫兹ViSAR振动补偿成像算法

doi: 10.13700/j.bh.1001-5965.2015.0862
基金项目: 

国家自然科学基金 61471019

详细信息
    作者简介:

    孙伟, 女, 硕士研究生。主要研究方向:雷达信号处理。E-mail:bhswaction@126.com

    孙进平, 男, 教授, 博士生导师。主要研究方向:雷达信号与数据处理的算法及软硬件实现、信号分析检测与估计等。E-mail:sunjinping@buaa.edu.cn

    张远, 男, 博士研究生。主要研究方向:雷达信号处理。E-mail:yuan.zhang@buaa.edu.cn

    通讯作者:

    张耀天, 男, 讲师。主要研究方向:雷达信号处理。Tel.:010-82338985, E-mail:zhangyaotian@buaa.edu.cn

  • 中图分类号: V221+.3;TB553

High squint helicopter-borne terahertz ViSAR vibration compensation imaging algorithm

Funds: 

National Natural Science Foundation of China 61471019

More Information
  • 摘要:

    太赫兹视频合成孔径雷达(ViSAR)载波波长短,直升机载平台的微小高频振动将引起回波信号相位的显著变化,进而严重恶化ViSAR的成像性能。本文在建立斜视ViSAR平台振动成像几何模型的基础上,提出了大斜视模式下的振动相位误差补偿成像算法。该算法结合运动补偿原理,将斜视成像侧视化处理,然后采用改进的多普勒Keystone变换方法在二维频域校正由平台振动引起的距离单元徙动,最终在距离多普勒域实现振动相位误差补偿。仿真结果验证了该算法的有效性。

     

  • 图 1  斜视ViSAR平台振动几何

    Figure 1.  Squint ViSAR platform vibration geometry

    图 2  斜视ViSAR数据采集平面成像几何

    Figure 2.  Squint ViSAR data acquisition plane imaging geometry

    图 3  斜视太赫兹ViSAR振动补偿成像算法流程

    Figure 3.  Flow of squint terahertz ViSAR vibration compensation imaging algorithm

    图 4  点目标成像仿真结果对比

    Figure 4.  Comparison of point target imaging simulation results

    图 5  点目标成像质量分析

    Figure 5.  Point target imaging quality analysis

    图 6  多点目标成像仿真结果

    Figure 6.  Multi-point target imaging simulation results

    图 7  分布场景成像仿真结果

    Figure 7.  Distributed scene imaging simulation results

    表  1  仿真参数

    Table  1.   Simulation parameters

    参数数值
    载波频率f0/GHz200
    场景中心斜距rC/km2
    直升机飞行速度v/(m·s-1)50
    脉冲重复频率PRF/kHz3
    脉冲带宽Tp/GHz1.5
    距离向采样频率Fs/GHz1.8
    下载: 导出CSV
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出版历程
  • 收稿日期:  2015-12-30
  • 录用日期:  2016-04-15
  • 网络出版日期:  2017-12-20

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