Nonlinear Trajectory SAR Imaging Algorithms:Overview and Experimental Comparison  

作　　者：Yi Xiong Buge Liang Ning Wang Jianlai Chen 

机构地区：[1]School of Automation,Central South University,Changsha 410083,China [2]Laboratory of Pinghu,Shenzhen 518100,China

出　　处：《Journal of Beijing Institute of Technology》2023年第6期653-669,共17页北京理工大学学报（英文版）

基　　金：supported in part by the National Natural Science Foundation of China(No.62271510);in part by Young Elite Scientists Sponsorship Program by CAST(No.2022QNRC001);in part by the Natural Science Foundation of Hunan Province(No.2021JJ40781);in part by the Open Fund of Laboratory of Pinghu.

摘　　要：The nonlinear characteristics of the motion trajectory of the synthetic aperture radar(SAR)flight platform can lead to severe two-dimensional space-variance characteristics of the signal,greatly affecting the imaging quality,and are currently considered as one of the difficulties in the field of SAR imaging.This paper first discusses the nonlinear trajectory SAR model and its space-variance characteristics and then discusses algorithms such as scaling-based algorithms,interpolation-based algorithms,time-domain algorithms,and hybrid algorithms.The relative merits and applicability of each algorithm are analyzed.Finally,computer simulation and actual data validation are conducted.

关 键 词：two-dimensional space-variance nonlinear synthetic aperture radar(NL-SAR) slant range model 

分 类 号：TN957.52[电子电信—信号与信息处理]