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一种基于无插值PFA的重叠子孔径成像算法
引用本文:仇志华,李勇,毛新华.一种基于无插值PFA的重叠子孔径成像算法[J].航空兵器,2009(5):50-54.
作者姓名:仇志华  李勇  毛新华
作者单位:南京航空航天大学信息科学与技术学院,南京,210016
摘    要:以极坐标格式算法(PFA)产生子孔径图像为基础,研究重叠子孔径算法(OSh),通过补偿PFA中残留的二次相位误差,有效地扩大了高分辨率合成孔径雷达系统的图像聚焦范围,并通过引入无插值的PFA处理流程提高了计算效率。仿真和实测数据成像结果验证了该算法的有效性。

关 键 词:合成孔径雷达  成像算法  重叠子孔径算法(OSA)  相位误差补偿

An OSA Algorithm Based on the Interpolation-Free PFA
QIU Zhi-hua,LI Yong,MA Xin-hua.An OSA Algorithm Based on the Interpolation-Free PFA[J].Aero Weaponry,2009(5):50-54.
Authors:QIU Zhi-hua  LI Yong  MA Xin-hua
Affiliation:(College of Information Science and Technology, Nanjing Univ. of Aeronautics and Astronautics, Nanjing 210016, China)
Abstract:By using polar-format algorithm ( PFA) to generate subaperture images, me overlappeu subaperture algorithm (OSA) can effectively compensate the residue second-order phase error and enlarge the scene size of the foused image for a high-resolution synthetic aperutre radar system. Additionally, the signal processing steps of the interpolation-free PFA is also introduced to improve the computation efficiency. The point-targets simulation and live data processing results show the validity of the algorithm.
Keywords:synthetic aperture radar(SAR)  image formation algorithm  overlapped subaperture algorithm (OSA)  phase error compensation
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