| 基于时频分析的成像小弱运动目标检测方法 |
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| 引用本文： | 李正周,田蕾,郑微,张月华,金钢.基于时频分析的成像小弱运动目标检测方法[J].强激光与粒子束,2011,23(9). |
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| 作者姓名： | 李正周 田蕾 郑微 张月华 金钢 |
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| 作者单位： | 1. 重庆大学 通信工程学院, 重庆 400044；2. 中国空气动力研究与发展中心, 四川 绵阳 621000；3. 中国科学院 光电技术研究所, 成都 610209 |
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| 基金项目： | 中央高校基本科研业务费项目(CDJZR10160004) |
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| 摘 要： | 针对传统空时域滤波器难以剔除杂波(尤其是杂波边缘)的缺点，提出了一种基于时频分析的弱小运动目标检测方法。理论分析表明，目标经过处的时频是一个小波包，波包的幅度与目标的幅度一致，而宽度则与目标速度成反比关系；杂波边缘经过处的时频则是一个上坡或者下坡。采用两级滤波方法检测运动目标，即首先采用恒虚警率准则过滤噪声，然后再利用目标出现处存在的波包，分别统计主瓣与旁瓣能量及其能量比，去除杂波，检测出运动目标。云背景下弱小目标检测试验结果证明了该方法的有效性。
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| 关 键 词： | 小弱运动目标 杂波 时频分析 短时加窗傅里叶变换 |
| 收稿时间： | 1900-01-01; |
Dim moving target detection method based on time-frequency analysis |
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| Li Zhengzhou,Tian Lei,Zheng Wei,Zhang Yuehua,Jin Gang.Dim moving target detection method based on time-frequency analysis[J].High Power Laser and Particle Beams,2011,23(9). |
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| Authors: | Li Zhengzhou Tian Lei Zheng Wei Zhang Yuehua Jin Gang |
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| Institution: | (1. College of Communication Engineering, Chongqing University, Chongqing 400044, China;2. China Aerodynamics Research and Development Center, Mianyang 621000, China;3. Institute of Optics and Electronics, Chinese Academy of Sciences, Chengdu 610209, China) |
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| Abstract: | For it is hard to remove clutters,especially the clutter edge,with conventional high-pass filters in spatial or temporal domain,a dim moving target detection method based on the time-frequency characters of target,noise and clutter is presented.Theoretical analysis shows that the magnitude at the target location in time-frequency domain is a small wave packet,whose magnitude is consistent with the target amplitude,and width is inversely proportional to target speed;the magnitude at clutter edge in time-freq... |
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| Keywords: | small dim moving target clutter time-frequency analysis short-time windowed discrete Fourier transform |
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