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基于变迹滤波的MIMO-SAR图像分辨率增强技术

徐光耀 刘永泽 许小剑

徐光耀, 刘永泽, 许小剑等 . 基于变迹滤波的MIMO-SAR图像分辨率增强技术[J]. 北京航空航天大学学报, 2017, 43(7): 1313-1320. doi: 10.13700/j.bh.1001-5965.2016.0514
引用本文: 徐光耀, 刘永泽, 许小剑等 . 基于变迹滤波的MIMO-SAR图像分辨率增强技术[J]. 北京航空航天大学学报, 2017, 43(7): 1313-1320. doi: 10.13700/j.bh.1001-5965.2016.0514
XU Guangyao, LIU Yongze, XU Xiaojianet al. Enhanced resolution in MIMO-SAR imaging using apodization[J]. Journal of Beijing University of Aeronautics and Astronautics, 2017, 43(7): 1313-1320. doi: 10.13700/j.bh.1001-5965.2016.0514(in Chinese)
Citation: XU Guangyao, LIU Yongze, XU Xiaojianet al. Enhanced resolution in MIMO-SAR imaging using apodization[J]. Journal of Beijing University of Aeronautics and Astronautics, 2017, 43(7): 1313-1320. doi: 10.13700/j.bh.1001-5965.2016.0514(in Chinese)

基于变迹滤波的MIMO-SAR图像分辨率增强技术

doi: 10.13700/j.bh.1001-5965.2016.0514
详细信息
    作者简介:

    徐光耀 男, 硕士研究生, 工程师主要研究方向:超分辨SAR诊断成像

    刘永泽 男, 博士。研究生主要研究方向:MIMO-SAR成像

    许小剑 男, 博士, 教授, 博士生导师。主要研究方向:遥感信息处理、SAR成像、电磁仿真建模

    通讯作者:

    许小剑, E-mail:xiaojianxu@buaa.edu.cn

  • 中图分类号: TN957.52

Enhanced resolution in MIMO-SAR imaging using apodization

More Information
  • 摘要:

    针对多输入多输出合成孔径雷达(MIMO-SAR)在近场目标散射特征诊断成像中,非正交旁瓣难以通过常规方法进行有效抑制的问题,分析了MIMO-SAR图像非正交旁瓣的产生机理,提出了基于空间变迹滤波(SVA)和三变迹处理相结合的旁瓣抑制方法。仿真和实验结果表明,本文方法不仅能很好地抑制距离向旁瓣,而且对于方位向非正交旁瓣也具有较好的抑制效果,提高了MIMO-SAR图像的二维分辨率和动态范围。

     

  • 图 1  天线阵列结构及成像几何关系

    Figure 1.  Antenna array configuration and imaging geometry

    图 2  MIMO-SAR近场点目标二维点扩散函数及二维切片

    Figure 2.  MIMO-SAR near-field point target 2D PSF and 2D cut

    图 3  距离向SVA与方位向三变迹滤波处理流程

    Figure 3.  Processing flow of down range SVA and cross range tri-apodization filtering

    图 4  方法1与Vu方法[5-6]窗函数响应对比

    Figure 4.  Comparison of window function response betweenproposed method and Vu's method[5-6]

    图 5  方位向切片相位校正前后结果对比

    Figure 5.  Comparison of cross range cut before and after phase correction

    图 6  二维可分离SVA处理流程

    Figure 6.  Processing flow of 2D separable SVA

    图 7  大间隔三点目标不同变迹滤波处理的结果

    Figure 7.  Processing results of different apodization filtering of a large-space three points target

    图 8  大间隔三点目标视场中心处的二维切片

    Figure 8.  2D cuts at center of filed of view at a large-space of three points target

    图 9  小间隔三点目标不同变迹滤波处理的结果

    Figure 9.  Processing results of different apodizationfiltering of a small-space three points target

    图 10  小间隔三点目标视场中心处的二维切片

    Figure 10.  2D cuts at center of filed of view at asmall-space of three points target

    图 11  某飞机模型实测数据处理的结果

    Figure 11.  Measured data processing results of an airplane model

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出版历程
  • 收稿日期:  2016-06-14
  • 录用日期:  2016-09-09
  • 网络出版日期:  2017-07-20

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