| 对ISAR成像中扫频非线性的曲线拟合 |
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| 引用本文： | 李玉星,王振荣,鲁旭东,王攀峰.对ISAR成像中扫频非线性的曲线拟合[J].北京航空航天大学学报,2001,27(2):150-152. |
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| 作者姓名： | 李玉星 王振荣 鲁旭东 王攀峰 |
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| 作者单位： | 北京航空航天大学 电子工程系 |
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| 摘 要： | 线性调频法是逆合成孔径雷达(ISAR)成像中一种常用的方法,在该方法中扫频非线性对成像质量有一定的影响.特别是在频率较高、扫频带宽很宽及扫频时间较短时,扫频的非线性曲线很难描述出来．从基本的ISAR成像知识出发,运用简单的数学方法,首次对用任意次曲线来模拟扫频非线性曲线的方法进行了研究.最后,通过实验验证了这种方法的正确性.
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| 关 键 词： | 成像 非线性 曲线拟合 线性调频法 |
| 文章编号： | 1001-5965(2001)02-0150-03 |
| 收稿时间： | 1999-12-03 |
| 修稿时间： | 1999年12月3日 |
Curve Simulation for Nonlinearity in Frequency Sweep in ISAR Imaging |
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| LI Yu-xing,WANG Zhen-rong,LU Xu-dong,WANG Pan-feng.Curve Simulation for Nonlinearity in Frequency Sweep in ISAR Imaging[J].Journal of Beijing University of Aeronautics and Astronautics,2001,27(2):150-152. |
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| Authors: | LI Yu-xing WANG Zhen-rong LU Xu-dong WANG Pan-feng |
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| Institution: | Beijing University of Aeronautics and Astronautics, Dept. of Electronic Engineering |
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| Abstract: | LFM is one of widely used methods of ISAR. Nonlinearity in frequency sweep has some effects on the quality of imaging. Especially in the high frequency, broad band and short tune frequency sweep, frequency swept nonlineatity of LFM curve can hardly distribute it. Based on the theory of ISAR, using simple maths methods, the method of using arbitrary times polynomial simulation for the nonlinearity testing of LFM signal is studied for the first time. Finally, the correctness of this method is approved by one experiment. |
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| Keywords: | image formation non linear curve fitting LFM |
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