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�������պ����ѧѧ�� 2006, Vol. 32 Issue (04) :440-444    DOI:
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Multi-channel Chirp Scaling algorithm for high-resolution multi-channel antenna space-borne SAR imaging
Wang Pengbo, Zhou Yinqing, Chen Jie, Li Chunshen*
School of Electronics and Information Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100083, China

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ժҪ �ڷ����������������㷨�ڴ���߷ֱ��ʶ�ͨ����������SAR(Synthetic Aperture Radar)�ز��źŷ�������ԵĻ�����,��������ڸ߷ֱ��ʶ�ͨ���������غϳɿ׾��״�Ķ�ͨ��Chirp Scaling�����㷨(MCCS, Multi-channel Chirp Scaling Algorithm).���㷨���ò����˲�������ʵ�ִӸ߷ֱ��ʶ�ͨ����������SAR�ز����ݵ���ͳ����SAR�ز����ݵĵ�Чת��,����Chirp Scalingԭ��ʵ�־�ȷ�۽�,�����Ӹ����ϰ����˷ֲ���λ����(DPC,Displaced Phase Center)��Ч�����Ը߷ֱ��ʶ�ͨ����������SAR��Լ��.���ͨ���������������֤�˸��㷨����Ч��.
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Abstract�� Based on the analysis of the limitation that exists in the traditional imaging algorithms when processing the echo of high resolution multi-channel antenna space-borne SAR(Synthetic Aperture Radar), a novel MCCS(multi-channel Chirp Scaling algorithm) for high resolution multi-channel antenna space-borne SAR imaging is developed. The algorithm uses a filter banks to realize the conversion fromthe echo of high resolution multi-channel antenna space borne SAR to the echo of strip map SAR. When the filter banks are designed properly, the conversion is strictly equivalent. the ambiguity that caused by inadequately sampling can be completely avoided, and the dependence on DPC(displaced phase center) equivalent condition can be completely removed. But when using the traditional imaging algorithms, the DPC equivalent condition should be strictly satisfied. Then using the Chirp Scaling principle to accomplish imaging, and the precise focusing picture can be realized. Finally, the computer simulation showed the validity of the algorithm.
Keywords�� synthetic aperture radar   high resolution   radar echo   imaging algorithm     
Received 2005-04-20;
About author: ������(1979-),��,����������,��ʿ��, wangpb7966@eyou.com.
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������, ������, �½�, ���.�߷ֱ��ʶ�ͨ����������SAR��MCCS�����㷨[J]  �������պ����ѧѧ��, 2006,V32(04): 440-444
Wang Pengbo, Zhou Yinqing, Chen Jie, Li Chunshen.Multi-channel Chirp Scaling algorithm for high-resolution multi-channel antenna space-borne SAR imaging[J]  JOURNAL OF BEIJING UNIVERSITY OF AERONAUTICS AND A, 2006,V32(04): 440-444
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