Far-Field Limit of PFA for SAR Moving Target Imaging
In this paper,a new derivation of the polar format algorithm (PFA) for spotlight synthetic aperture radar (SAR) imaging is presented,which is useful when investigating its response to the moving target. Our derivation starts with examining the mostly adopted implementation of the PFA,i.e.,the separable 1-D range and azimuth resampling procedures for their roles in range cell migration (RCM) correction,respectively.It is shown that the former performs RCM pre-deformation,while the latter is substantially the combination of RCM linearization and the keystone transform (KT),i.e.,a well-known technique for SAR imaging of moving targets. The new formulation approach is applied to analyze the moving target. The far-field limit of the PFA for moving target focusing is derived,which can be used to predict the targets impulse response function (1RF). The presented work might be helpful when considering a SAR system with the capability of ground moving target indication and imaging (GMTI&Im).
Derivation of polar format algorithm range cell migration correction keystone transform far-field limit of SAR moving target focusing ground moving target indication and imaging
Daiyin Zhu Xinhua Mao Yong Li
Department of Electronic Engineering,Nanjing University of Aeronautics and Astronautics,210016 Nanjing,China
国际会议
2009 2nd Asian-Pacific Conference on Synthetic Aperture Radar(第二届亚太合成孔径雷达会议)
西安
英文
214-218
2009-10-26（万方平台首次上网日期，不代表论文的发表时间）