| 超宽带合成孔径雷达图像中二面角目标的检测 |
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| 引用本文： | 董臻,梁甸农. 超宽带合成孔径雷达图像中二面角目标的检测[J]. 系统工程与电子技术, 2003, 25(4): 391-393 |
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| 作者姓名： | 董臻 梁甸农 |
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| 作者单位： | 国防科技大学电子科学与工程学院,湖南,长沙,410073 |
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| 基金项目： | 国家部委基金(7.5.3.2) |
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| 摘 要： | 目标的散射特性常依赖于雷达和目标间的姿态角,这种依赖性在大积累角的UWB-SAR中尤为明显。通过分析SAR图像的频谱特点,提出一种归一化标准偏差滤波方法。在该方法中,SAR的复数图像首先通过一组带通二维滤波器,然后将滤波器组的输出图像序列合成一幅信杂比得到提高的图像。对仿真数据处理的结果表明,该方法的性能优于曾提出的方向匹配滤波方法。
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| 关 键 词： | 超宽带合成孔径雷达 正侧闪烁 方向匹配滤波 归一化标准偏差滤波 |
| 文章编号： | 1001-506X(2003)04-0391-03 |
| 修稿时间： | 2002-03-28 |
Detection of Dihedral Targets in UWB-SAR Images |
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| DONG Zhen,LIANG Dian-nong. Detection of Dihedral Targets in UWB-SAR Images[J]. System Engineering and Electronics, 2003, 25(4): 391-393 |
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| Authors: | DONG Zhen LIANG Dian-nong |
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| Abstract: | The target's scattering characteristic is often dependent on target-radar attitude angle, which is especially prominent in the wide processing-angle UWB-SAR. After the characteristics of 2-D frequency domain of SAR images are analyzed, a method named normalized standard deviation filtering is proposed. A 2-D band-pass filter bank is designed to filter the complex SAR image and the output images are processed to get an image in which the signal-clutter-ratio is enhanced. The simulation result has proved that it is more efficient than the method of direction matching filtering proposed before. |
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| Keywords: | Ultra wide band-synthetic aperture radar Broadside flash Direction matching filtering Normalized standard deviation filtering |
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