数据采集与处理2018，Vol.33Issue(1)：93-105,13.DOI:10.16337/j.1004-9037.2018.01.011
一种适于弹载平台的PFA波前弯曲补偿方法
Wavefront Curvature Correction for Missile Borne Spotlight SAR Polar Format Image
摘要
Abstract
The polar format algorithm(PFA)for spotlight synthetic aperture radar(SAR)is influenced by wavefront curvature error.The error introduced will cause the missile borne SAR image edge blur and geometric distortion seriously.The previous wavefront curvature compensation methods are all assumed that the height of the radar is constant.These compensation methods cannot be directly applied to the case of missile borne SAR where the platform always has large dive angle.The application range of wave-front curvature error compensation method is restricted greatly.In this paper,the precise expression of wavefront curvature phase error in the frequency domain of missile borne SAR is derived.After image domain post-processing steps,the problems of distortion and defocus of PFA image in the missile borne SAR are solved effectively.This method further improves the precision of wavefront curvature compen-sation.At last,the correctness of formula and method is verified by simulation.关键词
弹载SAR/极坐标格式算法/波前弯曲误差/空变滤波/几何失真Key words
missile borne SAR/polar format algorithm/wavefront curvature error/space variant filte-ring/geometric distortion分类
信息技术与安全科学引用本文复制引用
李盘虎,沈薇,毛新华..一种适于弹载平台的PFA波前弯曲补偿方法[J].数据采集与处理,2018,33(1):93-105,13.基金项目
国家自然科学基金(61671240)资助项目 （61671240）
江苏省优秀青年基金(BK20170091)资助项目. （BK20170091）
