| 基于Spectral-fit方法的弹载聚束SAR成像方法 |
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| 引用本文： | REN Guo-lei,任国磊,谢华英,赵宏钟.基于Spectral-fit方法的弹载聚束SAR成像方法[J].制导与引信,2007,28(4):40-44. |
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| 作者姓名： | REN Guo-lei 任国磊 谢华英 赵宏钟 |
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| 作者单位： | 国防科技大学,ATR重点实验室,湖南,长沙,410073 |
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| 摘 要： | 弹载聚束式SAR成像可以转化为非均匀转动成像,如何消除非均匀转动的影响是关键技术之一。Spectral-fit法的目的是从原始信号的非均匀样本中得到该信号的真实频谱。文章分析了弹载聚束SAR的特点,研究了非均匀转动对成像的影响,将Spectral-fit法应用到方位向处理中,实现了非均匀转动的补偿和方位向分辨的有机结合。最后仿真结果验证了算法的有效性。
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| 关 键 词： | 合成孔径雷达 非均匀转动 成像 补偿 |
| 文章编号： | 1671-0576（2007）04-0040-05 |
| 收稿时间： | 2007-07-23 |
| 修稿时间： | 2007年7月23日 |
An Imaging Algorithm of Missile-borne Spotlight SAR Based on Spectral-fit Method |
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| REN Guo-lei.An Imaging Algorithm of Missile-borne Spotlight SAR Based on Spectral-fit Method[J].Guidance & Fuze,2007,28(4):40-44. |
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| Authors: | REN Guo-lei |
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| Abstract: | Missile-borne spotlight SAR can be converted to nonuniform rotation imaging after translational motion compensation.How to eliminate its infection is fatal to radar imaging.The spectral-fit method is applied in recovering the real spectrum of the original signal from its nonuniform samples.In the paper,an analysis of the characteristics of missile-borne spotlight SAR is gived and the effect of nonuniform rotation to imaging is studied.And Spectral-fit method is introduced into azimuth processing to realize the combination of nonuniform rotation compensation and azimuth imaging resolution.Finally the processing is proved to be correct by the computer simulation. |
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| Keywords: | synthetic aperture radar nonuniform rotation imaging compensation |
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