北京航空航天大学学报 ›› 2001, Vol. 27 ›› Issue (2): 150-152.

• 论文 • 上一篇    下一篇

对ISAR成像中扫频非线性的曲线拟合

李玉星, 王振荣, 鲁旭东, 王攀峰   

  1. 北京航空航天大学 电子工程系
  • 收稿日期:1999-12-03 出版日期:2001-02-28 发布日期:2010-09-27
  • 作者简介:李玉星(1972-),男,黑龙江同江人,博士生,100083,北京.

Curve Simulation for Nonlinearity in Frequency Sweep in ISAR Imaging

LI Yu-xing, WANG Zhen-rong, LU Xu-dong   

  1. Beijing University of Aeronautics and Astronautics, Dept. of Electronic Engineering
  • Received:1999-12-03 Online:2001-02-28 Published:2010-09-27

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.

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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