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�������պ����ѧѧ�� 2001, Vol. 27 Issue (2) :150-152    DOI:
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Curve Simulation for Nonlinearity in Frequency Sweep in ISAR Imaging
LI Yu-xing, WANG Zhen-rong, LU Xu-dong*
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.
Keywords�� image formation   ��non-linear   ��curve fitting   LFM     
Received 1999-12-03;
About author: ������(1972-),��,������ͬ����,��ʿ��,100083,����.
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������, ������, ³��, ���ʷ�.��ISAR������ɨƵ�����Ե��������[J]  �������պ����ѧѧ��, 2001,V27(2): 150-152
LI Yu-xing, WANG Zhen-rong, LU Xu-dong.Curve Simulation for Nonlinearity in Frequency Sweep in ISAR Imaging[J]  JOURNAL OF BEIJING UNIVERSITY OF AERONAUTICS AND A, 2001,V27(2): 150-152
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