| 基于Chirplet的逆合成孔径雷达回波高速运动补偿算法 |
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| 引用本文： | 金光虎,高勋章,黎湘,陈永光.基于Chirplet的逆合成孔径雷达回波高速运动补偿算法[J].宇航学报,2010,31(7). |
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| 作者姓名： | 金光虎 高勋章 黎湘 陈永光 |
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| 作者单位： | 1. 国防科技大学电子科学与工程学院,长沙,410073
2. 中国人民解放军63880部队,洛阳,471003 |
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| 摘 要： | 高速运动补偿是恢复距离像分辨率和提高ISAR像清晰度的关键,本文提出了一种新的高速运动补偿算法,通过初像加窗构建了独立特显点回波,避免了多散射点回波相互叠加造成调频特性被淹没的现象,采用chirplet小波分解得到了调频率的估计值,实现了径向速度的正确估计及回波的高速运动补偿,仿真实验表明了本文算法的有效性.
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| 关 键 词： | 高速补偿 特显点 调频率 |
A High Velocity Motion Compensation Algorithm of ISAR Echo Based on Chirplet Transform |
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| JIN Guang-hu,GAO Xun-zhang,LI Xiang,CHEN Yong-guang.A High Velocity Motion Compensation Algorithm of ISAR Echo Based on Chirplet Transform[J].Journal of Astronautics,2010,31(7). |
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| Authors: | JIN Guang-hu GAO Xun-zhang LI Xiang CHEN Yong-guang |
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| Institution: | JIN Guang-hu1,GAO Xun-zhang1,LI Xiang1,CHEN Yong-guang2(1.Institute of Spatial Electronics Information Technology,NUDT,Changsha 410073,China,2.Unit 63880,PLA,Luoyang 471003,China) |
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| Abstract: | The high velocity motion compensation is the key technique for restoring the profile resolution and improving the clarity of ISAR image. The paper proposed a new compensation method based on chirplet transform. The dominant scattering center echo is reconstructed based on windowed rough ISAR image. And the effect of multi-scattering centers on chirp rate is avoided. By chirplet decomposition,the chirp rate is obtained,the velocity is estimated and the phase error is compensated. The experimental result show... |
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| Keywords: | chirplet ISAR |
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