| 基于谱图域相消的含旋转部件目标成像新方法 |
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| 引用本文： | 李开明,罗迎,梁贤姣,张群. 基于谱图域相消的含旋转部件目标成像新方法[J]. 弹箭与制导学报, 2009, 29(2) |
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| 作者姓名： | 李开明 罗迎 梁贤姣 张群 |
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| 作者单位： | 1. 空军工程大学电讯工程学院,西安,710077
2. 空军工程大学电讯工程学院,西安,710077;复旦大学波散射与遥感信息国家教育部重点实验室,上海,200433 |
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| 基金项目： | 国家自然科学基金(60672032);;陕西省自然科学基础研究计划(2007F28)资助 |
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| 摘 要： | 采用传统的距离-多普勒方法对直升机等含有旋转部件的目标进行ISAR成像时，旋转部件产生的微多普勒效应严重地污染了目标主体像。由于运动补偿后目标在谱图域表现为正弦谱图与直线谱图的叠加，基于直线谱图的幅度在短时间内的不变性。文中提出一种将相消技术应用于谱图域的微多普勒提取新方法，可快速有效地实现微多普勒信息的分离与提取，并获得较为清晰的目标主体像；仿真实验表明该算法具有较好的稳健性和计算效能。
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| 关 键 词： | 微多普勒 相消技术 谱图域 ISAR成像 |
A Novel Method Based on Spectrogram Cancellation for ISAR Imaging of a Target with Rotating Parts |
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| LI Kaiming,LUO Ying,LIANG Xianjiao,ZHANG Qun. A Novel Method Based on Spectrogram Cancellation for ISAR Imaging of a Target with Rotating Parts[J]. Journal of Projectiles Rockets Missiles and Guidance, 2009, 29(2) |
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| Authors: | LI Kaiming LUO Ying LIANG Xianjiao ZHANG Qun |
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| Affiliation: | 1 The Telecommunication Engineering Institute;AFEU;Xi'an 710077;China;2 Key Laboratory of Wave Scattering and Remote Sensing Information;Ministry of Education;Fudan University;Shanghai 200433;China |
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| Abstract: | As for the ISAR imaging of a target with rotating parts,such as a helicopter,the quality of image is unsatisfied by using classical range-Doppler algorithm.The image of main body is severely contaminated by micro-Doppler effect generated by rotating parts.In spectrogram,the information of target is represented as the mixture of sinusoids and straight lines after motion compensation.The amplitude of every straight line spectrogram is invariable with respect to time in short time interval.Based on this idea,a... |
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| Keywords: | micro-Doppler cancellation technique spectrogram ISAR image |
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