一种适合逆合成孔径激光雷达的成像算法  

An Imaging Algorithm for Inverse Synthetic Aperture Laser Radar

作　　者：赵鑫[1] 周飚[1] 齐志宏[1] 杨进华[1] 

机构地区：[1]长春理工大学光电工程学院,长春130022

出　　处：《长春理工大学学报（自然科学版）》2014年第1期68-71,共4页Journal of Changchun University of Science and Technology(Natural Science Edition)

摘　　要：逆合成孔径激光雷达是主动式有源成像雷达,能够实现高速运动物体的实时高分辨成像。但传统R-D算法很难得到目标的二维高分辨图像。提出一种适合逆合成孔径激光雷达成像的算法,通过时频分析法分析逆合成孔径激光雷达的回波信号特征,对光外差探测后的回波信号进行重排Wigner分布和Radon变换的处理,估计出目标的运动速度,通过构造有效的补偿因子,实现对目标的二维高分辨率成像。通过仿真实验得到了分辨率更高的图像,验证了此方法的有效性。Inverse synthetic aperture laser radar is an active imaging radar; and the real-time imaging of moving target can be achieved in ultra-high resolution. Two-dimensional high-resolution images can’t be obtained by the traditional R-D algorithms. An Imaging algorithm for Inverse synthetic aperture laser radar is proposed in this paper. Characteris-tics of the echo signals are analyzed through the form of time-frequency analysis,then Wigner distribution and the Ra-don transform of detected echo signals are reset. After that, the speed of the moving target is estimated and through constructing an effective compensation factor, two-dimensional high-resolution imaging of the moving target are real-ized. High-resolution images are obtained by the simulation experiment and the effectiveness of this method is proved.

关 键 词：逆合成孔径成像激光雷达 运动目标 成像算法 运动补偿 

分 类 号：TN958[电子电信—信号与信息处理]