An approach of motion compensation and ISAR imaging for micro-motion targets  

作　　者：WANG Yong ZHOU Xingyu LU Xiaofei LI Yajun 

机构地区：[1]School of Electronics and Information Engineering,Harbin Institute of Technology,Harbin 150001,China [2]Jiuquan Satellite Launch Center,Jiuquan 732750,China [3]Shanghai Radio Equipment Research Institute,Shanghai 201109,China

出　　处：《Journal of Systems Engineering and Electronics》2021年第1期68-80,共13页系统工程与电子技术（英文版）

基　　金：supported by the National Natural Science Foundation of China(61871146);the Fundamental Research Funds for the Central Universities;the State Key Laboratory of Millimeter Waves(K202022)。

摘　　要：Inverse synthetic aperture radar(ISAR)imaging of the target with the non-rigid body is very important in the field of radar signal processing.In this paper,a motion compensation method combined with the preprocessing and global technique is proposed to reduce the influence of micro-motion components in the fast time domain,and the micro-Doppler(m-D)signal in the slow time domain is separated by the improved complex-valued empirical-mode decomposition(CEMD)algorithm,which makes the m-D signal more effectively distinguishable from the signal for the main body by translating the target to the Doppler center.Then,a better focused ISAR image of the target with the non-rigid body can be obtained consequently.Results of the simulated and raw data demonstrate the effectiveness of the algorithm.

关 键 词：inverse synthetic aperture radar(ISAR) micro-Doppler(m-D) motion compensation complex-valued empiricalmode decomposition(CEMD) 

分 类 号：TN957.52[电子电信—信号与信息处理]