面向车载应用的混沌激光成像雷达抑制交叉干扰实验研究

Mutual Interference Suppression of Chaotic Imaging Lidar for Automotive Application

摘要:

激光雷达已经成为无人智能车必备的环境感知设备。现有基于脉冲测距体制的车载激光雷达极易受到其他车载激光雷达的交叉干扰,导致雷达虚警和误判,引发交通事故。文章利用布尔混沌信号调制激光器产生的混沌激光作为雷达探测信号,结合扫描成像技术,构建混沌激光成像雷达系统,实验实现了目标物体的三维成像,并对其抑制交叉干扰的能力进行了实验测试。实验结果表明,在不采取任何抑制干扰措施的前提下,基于布尔混沌雷达波形的正交性,仍可在高强度干扰下实现探测目标的三维重构,有效抑制交叉干扰的影响。

Abstract:

Lidar has become a necessary environment sensing device for unmanned intelligent vehicles. The existing vehicular lidar based on pulse signal is vulnerable to the mutual interference of other vehicular lidars, which leads to false alarm and misjudgment, and even traffic accidents. In this paper, the Boolean chaotic laser is used as the lidar detection signal. Combined with the scanning imaging technology, the chaotic laser imaging lidar system is constructed. The three-dimensional imaging of the target object is realized, and the ability of suppressing mutual interference is tested experimentally. The experimental results show that the three-dimensional reconstruction of the detected target can be realized under high-intensity interference. Based on the orthogonality of the Boolean chaotic waveform, the mutual interference can be effectively suppressed.