连续波频率调制雷达频域恒虚警检测的研究

摘要

光纤光耦合技术及数字处理技术的进步使得基于光纤连续波频率调制（FMCW）雷达技术快速发展。针对激光雷达时域信号处理在远程目标探测中的不足，根据雷达传统时域中的多重门限以及 FMCW 雷达回波频谱的特点，使用了频域恒虚警率（Constant False Alarm Rate，CFAR）目标检测技术。该 CFAR 技术是基于对回波信号进行时频变换，并对其结果进行解析，得出目标的距离及速度信息，实现在恒定虚警概率的前提下最大化提高系统的探测率。%Recent advances in fiber coupling technology and digital processing technology have enabled the fast devel-opment of fiber-based frequency modulated continuous wave radar technology.Based on traditional multi-threshold CFAR detection and characteristics of FMCW radar echo spectrum,the frequency-domain CFAR(Constant False A-larm Rate)target detection technology is used to cover the shortage of signal processing in time domain.This CFAR technique is based on the frequency transform,and the distance and speed information of the target are obtained through the analysis of echo signals.The maximize detection rate of the system is achieved under constant false alarm rate.