基于双天线回波互相关的切向运动目标检测  

Tangential Moving Target Detection Based on Cross-Correlation of Dual Antenna Echo

作　　者：黄晓红 戚子羿 高雪飞 HUANG Xiao-hong;QI Zi-yi;GAO Xue-fei(College of Artificial Intelligence,North China University of Science and Technology,Tangshan 063210,China)

机构地区：[1]华北理工大学人工智能学院,唐山063210

出　　处：《微波学报》2021年第4期83-88,共6页Journal of Microwaves

基　　金：河北省高等学校科学技术重点研究项目(ZD2020152);华北理工大学技术转移项目(TG2018004);。

摘　　要：常规雷达探测仅处理单一天线回波,难以通过径向多普勒频率对相对于雷达切向运动目标进行检测和速度估计,为解决这一问题,文中提出了一种基于双天线回波互相关的切向运动目标检测方法,首先计算多周期不同接收天线互相关后得到的相位变化信息,后利用选带快速傅里叶变换(Zoom Fast Fourier Transform,ZFFT)获得两天线回波波程差的变化频率,然后通过该频率较为精准地估计了切向运动目标速度,最后用恒虚警率检测器实现对目标的检测。为验证算法检测精度,仿真实验了有无噪声环境、不同目标数目的情况,并进行了实际场景测试。实际测试使用载频10 GHz的雷达对垂直雷达波束运动的切向运动目标进行检测,检测结果表明对目标的速度估计误差小于0.5 m/s。It is difficult to detect the tangential moving target relative to the radar through traditional radial Doppler frequency of a single antenna and estimate its speed.To solve this problem,a new method,based on cross-correlation of dual-antenna echoes,is proposed in this paper to detect tangential moving target.The phase change information is firstly obtained by calculating multi-period cross-correlation of different receiving antennas.Then the frequency of the echo path difference between the two antennas is acquired through band-selective thinning spectrum analysis(ZOOM-FFT)and the frequency is used to realize a more accurate estimation of the velocity of the tangential moving target.Finally the target is detected by the constant false alarm rate(CFAR)detector.To verify the detection accuracy of the algorithm,simulation experiments are carried out under different conditions with or without noise and with different number of targets.Furthermore,actual scene tests,a radar with a frequency of 10 GHz is also performed to detect the tangential moving target vertical to the radar beam and the velocity estimation error of the targets is less than 0.5 m/s.

关 键 词：毫米波雷达 切向目标检测 恒虚警率检测 互相关 选带快速傅里叶变换 

分 类 号：TN957.51[电子电信—信号与信息处理]