基于脉内干扰的宽带太赫兹雷达微多普勒模糊度分辨

Micro-Doppler Ambiguity Resolution for Wideband Terahertz Radar Using Intra-Pulse Interference.

作者信息

Yang Qi, Qin Yuliang, Deng Bin, Wang Hongqiang, You Peng

机构信息

College of Electronic Science and Engineering, National University of Defense Technology, Changsha 410073, China.

出版信息

Sensors (Basel). 2017 Apr 29;17(5):993. doi: 10.3390/s17050993.

DOI:10.3390/s17050993

PMID:28468257

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC5469346/

Abstract

Micro-Doppler, induced by micro-motion of targets, is an important characteristic of target recognition once extracted via parameter estimation methods. However, micro-Doppler is usually too significant to result in ambiguity in the terahertz band because of its relatively high carrier frequency. Thus, a micro-Doppler ambiguity resolution method for wideband terahertz radar using intra-pulse interference is proposed in this paper. The micro-Doppler can be reduced several dozen times its true value to avoid ambiguity through intra-pulse interference processing. The effectiveness of this method is proved by experiments based on a 0.22 THz wideband radar system, and its high estimation precision and excellent noise immunity are verified by Monte Carlo simulation.

摘要

由目标的微动引起的微多普勒是通过参数估计方法提取后用于目标识别的一个重要特征。然而，由于太赫兹频段相对较高的载波频率，微多普勒通常过于显著，会导致模糊性。因此，本文提出了一种利用脉内干扰的宽带太赫兹雷达微多普勒模糊度分辨方法。通过脉内干扰处理，微多普勒可以降低到其真实值的几十分之一，以避免模糊性。基于0.22太赫兹宽带雷达系统的实验证明了该方法的有效性，蒙特卡罗仿真验证了其高估计精度和出色的抗噪声能力。