GNSS-based BiSAR imaging using modified range migration algorithm

作     者：ZENG Tao LIU FeiFeng ANTONIOU Michail CHERNIAKOV Mikhail 

作者机构：Beijing Key Laboratory of Embedded Real-time Information Processing TechnologyBeijing Institute of Technology School of Electronic Electrical and Systems Engineering University of Birmingham 

出 版 物：《Science China(Information Sciences)》 (中国科学:信息科学(英文版))

年 卷 期：2015年第58卷第8期

页      面：144-156页

核心收录：

学科分类：08[工学] 080401[工学-精密仪器及机械] 081105[工学-导航、制导与控制] 0804[工学-仪器科学与技术] 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 National Natural Science Foundation of China(Grant Nos.61120106004,61225005,61427802) Chang Jiang Scholars Program(Grant No.T2012122) ‘111’Project of China(Grant No.B14010) Beijing Higher Education Young Elite Teacher Project(Grant No.YETP1168) 

主　　题：GNSS-based Bi SAR equivalent slant range model curvature of trajectory two-step processing modified Stolt mapping 

摘      要：This paper proposed a new focusing approach for the bistatic SAR systems with a GNSS(Global Navigation Satellite System) satellite as the transmitter. Because of the long integration time the inherited curvature of the transmitter’s trajectory was adopted and the spatial variance of the equivalent velocity was derived under the principal of equivalent slant range model in the system signal model. The proposed focusing approach consists of two-step processing. Firstly, the general Doppler phase from constant velocity of the echo data is focused by modified Stolt mapping. Secondly, the residual nonlinear Doppler phase due to velocity variation is compensated by means of block-processing-based adaptive phase compensation to achieve large scene focusing. The simulation and experimental results validate the proposed algorithm in GNSS-based Bi SAR systems.