| 基于分数傅立叶变换的机载SAR多运动目标检测 |
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| 引用本文： | 林文耀,覃亚丽,胡海容.基于分数傅立叶变换的机载SAR多运动目标检测[J].计算机与数字工程,2009,37(1):167-170. |
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| 作者姓名： | 林文耀 覃亚丽 胡海容 |
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| 作者单位： | 浙江工业大学信息工程学院光纤通信与信息工程研究所,杭州,310014 |
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| 摘 要： | 机载合成孔径雷达（SAR）运动目标回波本质上为chirp信号，基于分数阶傅里叶变换（FRFT）的chirp基分解特性及分数阶傅立叶变换与时频分布的关系，给出了一种基于FRFT的针对强度相差较大的多运动目标检测方法。与传统的WVD方法相比，FRFT是一个线性变换，因此对于多个动目标就没有交叉项的干扰，简化了处理过程降低了处理复杂度。仿真结果验证了其有效性。
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| 关 键 词： | 分数阶傅立叶变换 SAR 动目标检测 分数阶傅立叶域滤波 |
Airborne SAR Multiple Moving Targets Detection Based on Fractional Fourier Transform |
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| Lin Wenyao,Qin Yali,Hu Hairong.Airborne SAR Multiple Moving Targets Detection Based on Fractional Fourier Transform[J].Computer and Digital Engineering,2009,37(1):167-170. |
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| Authors: | Lin Wenyao Qin Yali Hu Hairong |
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| Affiliation: | Institute of of Fiber Optical Communication;College of Information Engineering;Zhejiang University of Technology;Hangzhou 310014 |
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| Abstract: | The echo of a moving target of airborne synthetic aperture radar(SAR) is analyzed as a chirp signal naturally.Based on the property of the chirp basis decomposition of the fractional Fourier transform(FRFT) and it's relationship with the time frequency distribution,a new method for detection of multiple moving targets whose scattering intensities differ evidently is proposed in this paper.Compared with the conventional WVD method,due to the linear property of the FRFT,the new method does not have to pay any... |
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| Keywords: | SAR |
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