摘要
提出了一种抗干扰性强、距离分辨率高、面向汽车防撞系统的混沌激光雷达。该雷达采用光反馈半导体激光器产生的宽带混沌激光作为光源,利用相关法实现目标距离的测量,进一步通过时间微分法测量速度。实验结果表明,雷达系统可获得优于9 cm的距离分辨率和亚秒量级的测量周期。仿真分析表明,作为一种汽车防撞雷达,该系统具有良好的抗干扰能力,能很好地解决信道串扰及环境噪声干扰导致的虚警问题。
An antijamming chaotic lidar system with high resolution for automotive collision warning radar application is proposed. Utilizing the broad bandwidth chaotic light emitted from a laser diode with optical feedback as the probe beam, we can locate the target by the correlation characteristics of chaotic light. Further, the velocity can be obtained by time differential method. Experimental results show this real-time chaotic lidar can obtain sub-second measurement period and 9 cm range resolution. Simulative results show that, as automotive collision warning radar, the chaotic lidar has good antijamming capability, can resolve the false alarm problem resulting by the multi-channel and noise jamming.
出处
《中国激光》
EI
CAS
CSCD
北大核心
2009年第9期2426-2430,共5页
Chinese Journal of Lasers
基金
国家自然科学基金(60777041)资助课题
关键词
激光技术
混沌激光
汽车防撞雷达
实时测距
交叉干扰
laser technique
chaotic laser
automotive collision warning radar
real-time ranging
cross jamming
