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Curvilinear synthetic aperture radar iterative algorithm
Tang Zhi, Li Jingwen, Wang Baofa*
School of Electronics and Information Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100083, China

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ժҪ �о������ߺϳɿ׾��״�(SAR,Synthetic Aperture Radar)��ά�ź�ģ�ͺ���ά�ź�ģ��,�õ�������SAR�ز��źŵ���ѧ���ʽ.�������㷨Ӧ��������SAR, ������С�������Է���׼��õ�������SAR��RELAX�����㷨���ۺ���,��ϸ�о��˶�άRELAX�����㷨����άRELAX�����㷨��ÿһ�����岽��,�ɹ��Ƴ�Ŀ����ɢ��ǿ�Ⱥ�λ��.�����˵��ƹ���,�涨����������,������RELAX�����㷨���ص�ͼ�����,�ó�RELAX�㷨�����ٶȿ�,��������Խ�С,�����������̻�����RELAX�㷨�ļ�����.�о��ɹ�ΪӦ�õ����㷨��ȡ����SAR���ݵ���ά��Ϣ�ṩ��ָ��.
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Abstract�� Curvilinear SAR (synthetic aperture radar) 2-D signal model and 3-D signal model were studied. The curvilinear SAR echo signal mathematic equation was derived. Iterative algorithm was applied to curvilinear SAR. According to minimum non-linear variance criteria, RELAX algorithm cost function in curvilinear SAR was founded. Every procedure in 2-D RELAX algorithm and 3-D RELAX algorithm was studied in detail. The target scatter amplitude and position can be estimated. The recursive idea was presented. The convergence condition was given. The characteristic and computation for RELAX algorithm were analyzed. RELAX algorithm can converge quickly and its computation is comparatively small. Rigorous convergence condition can increase RELAX algorithm computation. The analysis provides direction for curvilinear SAR data 3-D information extraction with iterative algorithm.
Keywords�� SAR (synthetic aperture radar)   curvilinear   iterative   RELAX algorithm     
Received 2006-09-05;


About author: �� ��(1977-),��,����ʮ����,��ʿ��,tangzhi1977@sohu.com.
�� ��, ���, ������.���ߺϳɿ׾��״�����㷨[J]  �������պ����ѧѧ��, 2007,V33(08): 882-885
Tang Zhi, Li Jingwen, Wang Baofa.Curvilinear synthetic aperture radar iterative algorithm[J]  JOURNAL OF BEIJING UNIVERSITY OF AERONAUTICS AND A, 2007,V33(08): 882-885
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