| 基于离散匹配傅里叶变换的逆合成孔径雷达成像算法 |
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| 引用本文： | 刘爱芳,朱晓华,陆锦辉,刘中. 基于离散匹配傅里叶变换的逆合成孔径雷达成像算法[J]. 兵工学报, 2004, 25(4): 458-461 |
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| 作者姓名： | 刘爱芳 朱晓华 陆锦辉 刘中 |
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| 作者单位： | 南京理工大学电子工程系,江苏南京,210094;南京理工大学电子工程系,江苏南京,210094;南京理工大学电子工程系,江苏南京,210094;南京理工大学电子工程系,江苏南京,210094 |
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| 基金项目： | 国家高技术研究发展计划(863计划) |
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| 摘 要： | 非匀速旋转目标和机动目标成像是逆合成孔径雷达(ISAR)技术的一个重点和难点,经典的距离一多普勒(RD)算法对其成像效果不佳.本文首先分析了ISAR成像回波信号模型,然后在对目标多普勒变化曲线作一阶近似的条件下提出了基于离散匹配傅里叶变换(DMFT)的ISAR成像算法.最后进行仿真实验,其结果表明了该方法的有效性.
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| 关 键 词： | 雷达 逆合成孔径雷达 离散匹配Fourier变换 线性调频信号 |
IMAGING IN INVERSE SYNTHETIC APERTURE RADAR(ISAR) BASED ON DISCRETE MATCHING FOURIER TRANSFORM |
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| Liu Aifang Zhu Xiaohua Lu Jinhui Liu Zhong. IMAGING IN INVERSE SYNTHETIC APERTURE RADAR(ISAR) BASED ON DISCRETE MATCHING FOURIER TRANSFORM[J]. Acta Armamentarii, 2004, 25(4): 458-461 |
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| Authors: | Liu Aifang Zhu Xiaohua Lu Jinhui Liu Zhong |
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| Abstract: | Imaging of nonuniformly rotating targets and maneuvering targets are difficult but important in ISAR technique. Traditional range-Doppler (RD) method can hardly achieve the desired imaging quality. In this paper, the radar echo signal model of ISAR was analyzed. A new algorithm based on discrete matching Fourier transform (DMFT) for ISAR imaging was then presented to the signal corresponding to each scatterer of the target in the linear frequency modulation (LFM) signal. Computer simulation was applied to illustrate its performance and the simulation results show its effectiveness. |
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| Keywords: | radar inverse synthetic aperture radar discrete match Fourier transform LFM signal |
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