相位补偿算法对提高太赫兹雷达距离像分辨率的研究  

Improvement in the range resolution of THz radar using phase compensation algorithm

作　　者：梁美彦[1,2] 张存林[1,2] 

机构地区：[1]北京理工大学光电学院,北京100081 [2]太赫兹波谱与成像北京市重点实验室太赫兹光电子学教育部重点实验室首都师范大学物理系,北京100048

出　　处：《物理学报》2014年第14期403-408,共6页Acta Physica Sinica

基　　金：国家重点基础研究发展计划(批准号:2007CB310408)资助的课题~~

摘　　要：介绍了0.2 THz频率步进雷达系统以及获得一维距离像的方法,并利用0.2 THz雷达对角反射器进行距离像分辨率实验,分析了频率步进信号相位不一致对一维距离像以及分辨率的影响,提出了回波相位补偿的方法.经过相位补偿后,目标距离像分辨率和信噪比都显著提高,分辨率达到了厘米量级.仿真和实验结果表明,宽带太赫兹频率步进雷达经过相位补偿,可以对目标进行高分辨率成像,从而为太赫兹雷达二维和三维成像奠定了基础.The paper describes the principle of 0.2 THz stepped-frequency radar system which is utilized to achieve a onedimensional range profile and range resolution. Terahertz（THz） stepped frequency radar is more susceptible to the phase error which will cause the spread and shift of range profile, thus affecting the quality of the high resolution range profile and signal-to-noise ratio. Therefore, a method of phase compensation is proposed to improve the range resolution. After phase compensation, the resolution and signal-to-noise ratio are improved remarkably. The range resolution can reach centimeter scale. Experimental and simulation results indicate that THz stepped frequency radar can reach high resolution range profile with the phase compensation method, which provides a foundation for further research on two-dimensional and three-dimensional image in the THz band.

关 键 词：太赫兹 频率步进雷达 相位补偿 距离像 

分 类 号：TN957.52[电子电信—信号与信息处理]