New slant range model and azimuth perturbation resampling based high-squint maneuvering platform SAR imaging

作     者：XIONG Xuying LI Gen MA Yanheng CHU Lina XIONG Xuying;LI Gen;MA Yanheng;CHU Lina

作者机构：Institute of UAV EngineeringArmy Engingeering UniversityShijiazhuang 050003China 

出 版 物：《Journal of Systems Engineering and Electronics》 (系统工程与电子技术（英文版）)

年 卷 期：2021年第32卷第3期

页      面：545-558页

核心收录：

学科分类：080904[工学-电磁场与微波技术] 0810[工学-信息与通信工程] 1201[管理学-管理科学与工程(可授管理学、工学学位)] 0808[工学-电气工程] 0809[工学-电子科学与技术（可授工学、理学学位）] 08[工学] 081105[工学-导航、制导与控制] 081001[工学-通信与信息系统] 081002[工学-信号与信息处理] 0825[工学-航空宇航科学与技术] 0811[工学-控制科学与工程] 

基　　金：supported by the basic research projects of Army Engineering University 

主　　题：synthetic aperture radar(SAR)imaging maneuvering platform high-squint azimuth perturbation resampling 

摘      要：Strong spatial variance of the imaging parameters and serious geometric distortion of the image are induced by the acceleration and vertical velocity in a high-squint synthetic aperture radar(SAR)mounted on maneuvering *** this paper,a frequency-domain imaging algorithm is proposed based on a novel slant range model and azimuth perturbation ***,a novel slant range model is presented for mitigating the geometric distortion according to the equal squint angle curve on the ground ***,the correction of azimuth-dependent range cell migration(RCM)is achieved by introducing a high-order time-domain perturbation ***,an azimuth perturbation resampling method is proposed for azimuth *** azimuth resampling and the time-domain perturbation are used for correcting first-order and high-order azimuthal spatial-variant components,*** results illustrate that the proposed algorithm can improve the focusing quality and the geometric distortion correction accuracy of the imaging scene effectively.