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人造目标散射结构的零极化辨识与应用

吴国庆 陈思伟 李永祯 王雪松

吴国庆,陈思伟,李永祯,等. 人造目标散射结构的零极化辨识与应用[J]. 电波科学学报,xxxx,x(x): x-xx. DOI: 10.12265/j.cjors.2021217
引用本文: 吴国庆,陈思伟,李永祯,等. 人造目标散射结构的零极化辨识与应用[J]. 电波科学学报,xxxx,x(x): x-xx. DOI: 10.12265/j.cjors.2021217
WU G Q, CHEN S W, LI Y Z, et al. Manmade targets scattering structure null-polarization recognition and application[J]. Chinese journal of radio science,xxxx,x(x): x-xx. (in Chinese). DOI: 10.12265/j.cjors.2021217
Citation: WU G Q, CHEN S W, LI Y Z, et al. Manmade targets scattering structure null-polarization recognition and application[J]. Chinese journal of radio science,xxxx,x(x): x-xx. (in Chinese). DOI: 10.12265/j.cjors.2021217

人造目标散射结构的零极化辨识与应用

doi: 10.12265/j.cjors.2021217
基金项目: 国家自然科学基金面上项目(61771480);湖南省杰出青年基金(2020JJ2034);湖湘青年英才项目(2019RS2025)
详细信息
    作者简介:

    吴国庆 (1997—),男,湖北人,国防科技大学电子科学学院硕士研究生,主要研究方向为极化成像雷达目标散射机理解译

    陈思伟 (1984—),男,四川人,国防科技大学电子科学学院特聘教授,硕士生导师,博士,主要研究方向为极化雷达成像、目标识别、电子对抗

    李永祯 (1977—),男,内蒙古人,国防科技大学电子科学学院研究员,博士生导师,博士,主要研究方向为新体制雷达与电子对抗

    王雪松 (1972—),男,内蒙古人,国防科技大学电子科学学院院长,博士生导师,博士,主要研究方向为雷达极化信息处理、雷达目标识别、新体制雷达技术

    通讯作者:

    陈思伟 E-mail: ‪chenswnudt@163.com

  • 中图分类号: TN957.51

Manmade targets scattering structure null-polarization recognition and application

  • 摘要: 目标最优极化是雷达极化问题研究的重要理论基础. 目标零极化又称共极化零点,是目标最优极化的重要组成部分. 通过目标零极化可以推导出目标的其他最优极化状态. 目标零极化广泛应用于目标极化匹配接收、目标对比增强等领域. 文中从目标结构辨识角度首次揭示了零极化理论方法在人造目标散射结构辨识方面具有独特优势,基于人造目标典型散射结构从理论上推导典型散射结构的零极化矢量. 将复极化比平面的极化表征方法与极化响应特征相结合,提出了零极化三维响应特征图可视化表征方法,揭示了典型散射结构的零极化差异,得到了零极化响应特征矢量. 在此基础上提出了一种人造目标散射结构的零极化辨识方法,通过提取极化雷达图像中人造目标的强散射中心,将散射中心的零极化响应特征矢量与典型散射结构进行匹配,从而确定散射中心的散射结构类型,实现人造目标结构辨识. 结合车辆和无人机等典型人造目标的电磁计算数据,开展了目标结构辨识对比实验. 与Cameron分解方法相比,本文提出的零极化散射结构辨识方法能够准确识别出散射中心的散射结构类型. 特别对结构对称型人造目标,本文方法识别结果的呈现的对称性更准确,更符合目标实际的散射特性.
  • 图  1  目标最优极化在Poincaré 球上的位置

    Fig.  1  The location of target optimal polarization on the Poincaré Sphere

    图  2  典型散射结构的零极化三维响应特征图

    Fig.  2  The Null-Pol 3D response pattern of canonical scatters

    图  3  典型散射结构的零极化响应特征矢量

    Fig.  3  The Null-Pol response characteristic vector of canonical scatters

    图  4  零极化散射结构辨识方法流程图

    Fig.  4  The flowchart of Null-Pol scattering structure recognition method

    图  5  十种不同车辆目标模型示意图

    Fig.  5  The vehicle models of CVDomes

    图  6  不同车辆目标零极化散射结构辨识结果和Cameron 分解结果

    Fig.  6  The results of Null-Pol scattering structure recognition and Cameron decomposition for CVDomes

    图  7  无人机模型和Pauli 合成图

    Fig.  7  The model and Pauli image of UAV target

    图  8  无人机零极化散射结构辨识结果和Cameron 分解结果

    Fig.  8  The results of Null-Pol scattering structure recognition and Cameron decomposition for UAV Target

    表  1  典型散射结构的零极化极化比和零极化矢量

    Tab.  1  The Null-Pol ratio and Null-Pol vector of canonical scatters

    散射结构散射矩阵极化比极化矢量
    三面角$\left[ {\begin{array}{*{20}{c}} 1&0 \\ 0&1 \end{array}} \right]$$ \pm {\text{j}}$$\dfrac{1}{{\sqrt 2 }}\left[ {\begin{array}{*{20}{c}} 1 \\ { \pm {\text{j}}} \end{array}} \right]$
    二面角$\left[ {\begin{array}{*{20}{c}} 1&0 \\ 0&{ - 1} \end{array}} \right]$$ \pm 1$$\dfrac{1}{{\sqrt 2 }}\left[ {\begin{array}{*{20}{c}} 1 \\ { \pm 1} \end{array}} \right]$
    圆柱体$\left[ {\begin{array}{*{20}{c}} 1&0 \\ 0&{{\raise0.7ex\hbox{$1$} \mathord{\left/ {\vphantom {1 2}}\right.}\lower0.7ex\hbox{$2$}}} \end{array}} \right]$$ \pm \sqrt 2 {\text{j}}$$\dfrac{1}{{\sqrt 3 }}\left[ {\begin{array}{*{20}{c}} 1 \\ { \pm \sqrt 2 {\text{j}}} \end{array}} \right]$
    窄二面角$\left[ {\begin{array}{*{20}{c}} 1&0 \\ 0&{ - {\raise0.7ex\hbox{$1$} \mathord{\left/ {\vphantom {1 2}}\right.}\lower0.7ex\hbox{$2$}}} \end{array}} \right]$$ \pm \sqrt 2 $$\dfrac{1}{{\sqrt 3 }}\left[ {\begin{array}{*{20}{c}} 1 \\ { \pm \sqrt 2 } \end{array}} \right]$
    左螺旋$\left[ {\begin{array}{*{20}{c}} 1&{\text{j}} \\ {\text{j}}&{ - 1} \end{array}} \right]$$ {\text{j}} $$\dfrac{1}{{\sqrt 2 }}\left[ {\begin{array}{*{20}{c}} 1 \\ {\text{j}} \end{array}} \right]$
    1/4波器件−1$\left[ {\begin{array}{*{20}{c}} 1&0 \\ 0&{\text{j}} \end{array}} \right]$$ \pm \dfrac{1}{{\sqrt 2 }}\left( {1 + {\text{j}}} \right)$$\dfrac{1}{{\sqrt 2 }}\left[ {\begin{array}{*{20}{c}} {\sqrt 2 } \\ { \pm \left( {1 + {\text{j}}} \right)} \end{array}} \right]$
    1/4波器件−2$\left[ {\begin{array}{*{20}{c}} 1&0 \\ 0&{ - {\text{j}}} \end{array}} \right]$$ \pm \dfrac{1}{{\sqrt 2 }}\left( {1 - {\text{j}}} \right)$$\dfrac{1}{{\sqrt 2 }}\left[ {\begin{array}{*{20}{c}} {\sqrt 2 } \\ { \pm \left( {1 - {\text{j}}} \right)} \end{array}} \right]$
    水平偶
    极子
    $\left[ {\begin{array}{*{20}{c}} 1&0 \\ 0&0 \end{array}} \right]$$\infty $$\left[ {\begin{array}{*{20}{c}} 0 \\ 1 \end{array}} \right]$
    垂直偶
    极子
    $\left[ {\begin{array}{*{20}{c}} 0&0 \\ 0&1 \end{array}} \right]$0$\left[ {\begin{array}{*{20}{c}} 1 \\ 0 \end{array}} \right]$
    右螺旋$\left[ {\begin{array}{*{20}{c}} 1&{ - {\text{j}}} \\ { - {\text{j}}}&{ - 1} \end{array}} \right]$$ - {\text{j}}$$\dfrac{1}{{\sqrt 2 }}\left[ {\begin{array}{*{20}{c}} 1 \\ { - {\text{j}}} \end{array}} \right]$
    下载: 导出CSV

    表  2  CVDomes数据主要参数

    Tab.  2  The parameters of CVDomes Data

    雷达中心频率/ GHz信号带宽/ GHz俯仰角/(°)方位角/(°)
    9.65.35300~360
    下载: 导出CSV
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  • 收稿日期:  2021-08-13
  • 录用日期:  2021-12-20
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