相位补偿算法对提高太赫兹雷达距离像分辨率的研究

梁美彦; 张存林

doi:10.7498/aps.63.148701

北京理工大学光电学院，北京 100081; 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

Improvement in the range resolution of THz radar using phase comp ensation algorithm

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.

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Abstract: The paper describes the principle of 0.2 THz stepped-frequency radar system which is utilized to achieve a one-dimensional 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.

相位补偿算法对提高太赫兹雷达距离像分辨率的研究

北京理工大学光电学院，北京 100081; 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

关键词:

Improvement in the range resolution of THz radar using phase comp ensation algorithm

北京理工大学光电学院，北京 100081; 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

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