红外与毫米波学报, 2015, 34 (4): 505, 网络出版: 2015-10-22
基于单频信号的662 GHz多普勒雷达层析成像
T-ray tomography using single-tone Doppler radar at 662 GHz
摘要
首先介绍了多普勒雷达层析成像的原理及该成像方法的极限分辨率理论推导, 并通过仿真获得了单频信号的点目标扩展函数(PSF), 验证了该成像方法在单频条件下的理论极限分辨率为波长的四分之一.然后, 介绍了中物院构建的662GHz单频雷达系统, 并针对该实验系统设计了基于卷积反投影的多普勒雷达层析成像算法.最后, 通过实验在太赫兹频段验证了多普勒雷达层析成像的有效性, 并利用测量获得的360°全姿态回波信号数据给出了分辨率优于1 cm的成像结果.
Abstract
In this paper, the Doppler radar tomography is investigated and the theoretical spatial resolution is analyzed. Then the algorithm of the Doppler radar tomography based on convolution back-projection method was proposed. Finally, some measurement results of imaging using 662 GHz single-tone signals were presented.
江舸, 成彬彬, 陈鹏, 安健飞, 张健. 基于单频信号的662 GHz多普勒雷达层析成像[J]. 红外与毫米波学报, 2015, 34(4): 505. JIANG Ge, CHENG Bin-Bin, CHEN Peng, AN Jian-Fei, ZHANG Jian. T-ray tomography using single-tone Doppler radar at 662 GHz[J]. Journal of Infrared and Millimeter Waves, 2015, 34(4): 505.