基于调频连续波的双基逆合成孔径雷达研究  

ISAR imaging analysis of bi-static FMCW radar

作　　者：朱小鹏[1] 张群[1] 罗迎[1] 李宏伟[1] 

机构地区：[1]空军工程大学电讯工程学院,陕西西安710077

出　　处：《电波科学学报》2011年第4期771-776,共6页Chinese Journal of Radio Science

基　　金：国家自然科学基金(No.60971100)

摘　　要：在双基地雷达模型的基础上,研究了应用调频连续波(FMCW)雷达进行双基逆合成孔径雷达(ISAR)成像的具体问题。首先对双基体制下FMCW雷达的回波信号进行详细分析,从回波信号相位中提取出采用FMCW信号所特有的距离快时间和方位慢时间耦合项,分析该耦合项在距离多普勒域的形式及其对目标一维距离像的影响,并采用相应的补偿算法进行补偿。仿真结果表明:所述补偿算法能有效改善采用FMCW信号导致的散焦现象,获得聚焦良好的目标成像图。The basic issue of bi-statie inverse synthetic aperture radar（ISAR） imaging is studied in this paper using frequency modulated continuous wave（FMCW） radar under the model of bi-static radar systems. Firstly, the echo signal of FMCW radar in hi-static system is analyzed, the coupling terms of range fast time and azimuth slow time which including uniquely in FMCW signal are extracted from the phase of echo signal. Then its forms in range Doppler domain and influences to range profile are analyzed. Simultaneously the corresponding compensation algorithm is applied to compensate the coupling terms. The last simulations show that the proposed compenation algorithm in this paper improves the defocus phenomenon which caused by using FMJCW signal and can achieve good imaging of targets.

关 键 词：调频连续波(FMCW) 逆合成孔径雷达(ISAR) 解线频调(De—chirp) 一维 距离像 

分 类 号：TN957[电子电信—信号与信息处理]