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�������պ����ѧѧ�� 2005, Vol. 31 Issue (05) :520-523    DOI:
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Application of genetic algorithm in high frequency 2-D scattering signatures analysis
Zheng Jun, Su Donglin, Liu Yan*
School of Electronics and Information Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100083, China

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ժҪ ��Ը�Ƶ���״�Ŀ���ɢ����������,�����������ʱƵ����——����Ӧ��˹����ʾ����(AGR)����Ŀǰ�Ķ�άɢ������ģ��,�����Ŵ��㷨(GA)���ڶ�άɢ��ģ�Ͳ����Ĺ���.�÷�����������Ŵ��㷨�����ڲ�����,����˶�ά��Чɢ�����ĵĹ�������.����������,�ü򻯵Ķ�άģ�Ͳ����������־�����ɢ������,Ҳ�������־���һ�����ȵ�չ��ʽɢ��ṹ,���øü�ģ������������¿���׼ȷ���Ƹ�ɢ�����ĵIJ���,ͬʱ�ڵ�����������Ҳ����ȡ�úܺõĹ�������,������ȥ�������������˺ܺõ�����.ͨ����֤,�ڼ򻯵�ɢ��ģ�ͻ����ϵ�Ŀ��ɢ������������׼ȷ�Ϳ��е�.
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Abstract�� To investigate the scattering features of radar target in high frequency, a joint time-frequency analysis method——the adaptive Gaussian basis representation (AGR) was introduced to simplify the 2-D scattering parameter model.To estimate the model parameters, Genetic algorithm (GA) was proposed. This method takes full advantage of GA’s inherent parallelism and solves the estimation problem of the equivalent scattering center.The simulation results show that this simplified 2-D scattering model may not only discriminate localized scattering centers of the radar target, but also present distributed scattering centers of definite length. In terms of the extraction of scattering features using this 2-D scattering model, and this method can estimate all parameters of scatteringcenters correctly on condition of no noise, at this time it has a good performance of estimating the position of initial scattering centers and eliminating the noise in the low signal to noise rate(SNR). The analysis using the above 2-D scattering model is correct and feasible.
Keywords�� scattering inverse problems   parameter estimation   time-frequency analysis   multi-scattering centers   genetic algorithm     
Received 2003-11-28;
About author: ֣ ��(1979-),Ů,���ճ�����,˶ʿ��, zhengjiong1979@sina.com.
�ն���, ����.�Ŵ��㷨�ڸ�Ƶ��Ŀ���άɢ������е�Ӧ��[J]  �������պ����ѧѧ��, 2005,V31(05): 520-523
Zheng Jun, Su Donglin, Liu Yan.Application of genetic algorithm in high frequency 2-D scattering signatures analysis[J]  JOURNAL OF BEIJING UNIVERSITY OF AERONAUTICS AND A, 2005,V31(05): 520-523
http://bhxb.buaa.edu.cn//CN/     ��     http://bhxb.buaa.edu.cn//CN/Y2005/V31/I05/520
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