[1]阚晓婷,刘智超,杨进华.基于ISAIL的空间小目标成像系统设计与仿真[J].江西师范大学学报(自然科学版),2016,40(04):396-399.
　KAN Xiaoting,LIU Zhichao,YANG Jinhua.Imaging System Design and Simulation for Space Small Target Based on ISAIL[J].Journal of Jiangxi Normal University:Natural Science Edition,2016,40(04):396-399.
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基于ISAIL的空间小目标成像系统设计与仿真()
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《江西师范大学学报》（自然科学版）[ISSN:1006-6977/CN:61-1281/TN]

卷:
40
期数:
2016年04期
页码:
396-399
栏目:
出版日期:
2016-09-01

文章信息/Info

Title:
Imaging System Design and Simulation for Space Small Target Based on ISAIL
作者:
阚晓婷; 刘智超; 杨进华
1.长春理工大学光电信息学院,吉林 长春 130000; 2.长春理工大学光电工程学院,吉林 长春 130000
Author(s):
KAN Xiaoting; LIU Zhichao; YANG Jinhua
1.College of Optical and Electronical Information,Changchun University of Science and Technology,Changchun Jilin 130000,China; 2.School of Optoelectronic Information,Changchun University of Science and Technology,Changchun Jilin 130000; China
关键词:
逆合成孔径成像激光雷达;  图像重建;  旋转运动;  空间小目标
Keywords:
inverse synthetic aperture imaging laser radar(ISAIL);  image reconstruction;  rotation;  space small target
分类号:
TP 274
文献标志码:
A
摘要:
为了实现对空间小目标的毫米级成像,设计了基于转台模型的逆合成孔径成像激光雷达系统,实现了距离向和方位向的数据融合并完成了模拟目标的2维图像重建.系统采用窄线宽光纤激光器、大带宽电光调制器完成了对激光脉冲的线性调频,并利用外差干涉的原理提高了回波信号的信噪比.结合空间小目标的运动特性,推演了含有旋转分量的激光雷达回波信号方程.在R-D算法中代入旋转分量完成图像重建的校正,实现了对模拟空间小目标的2维图像重建.实验用毫米级铝条模拟空间小目标,用步进电机使转台匀速旋转,模拟目标旋转过程.实验结果显示:当目标固定时通过回波能量即可获得1维距离向图像,峰值位置与真实目标的特征位置一致; 当目标运动时通过数据压缩、R-D算法及旋转分量的校正可获得模拟小目标ISAIL的2维重建图像,验证了系统可实现对毫米级模拟小目标的图像重建.
Abstract:
In order to achieve the goal of a small space millimeter imaging,inverse synthetic aperture imaging laser radar(ISAIL)system was designed based on turntable models.Data fusion of distance and azimuth had been realized,and two-dimensional reconstruction image for simulated targets was done.The narrow linewidth fiber lasers and high-bandwidth optical modulator were used in the system,and using heterodyne interferometry principle to improve the signal to noise ratio of the echo signal.Combined with the motion characteristics of the space small target,laser radar echo signal equation containing the rotating component was derived.In the R-D algorithm,the correction of image reconstruction was completed contain rotational components,the two-dimensional image reconstruction were realized to simulated space small targets.Experimental results show that it can get a one-dimensional distance of the target fixed by the consistent position to echo energy feature image,the peak position of the real target.When target moves,ISAIL two-dimensional reconstruction image can be got by data compression,R-D algorithm and rotational components calibration for simulation small target.It verifies the system can achieve image reconstruction millimeter analog small targets.

参考文献/References:

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备注/Memo

备注/Memo:
收稿日期:2016-01-21基金项目:国家自然科学基金(60637010)和吉林省教育厅“十二五”科学技术研究规划([2014]B060)资助项目.作者简介:阚晓婷(1982-),女,吉林延吉人,讲师,主要从事光电检测技术和信号处理的研究.
更新日期/Last Update: 1900-01-01