多目标LFMCW车载前向防撞雷达的实现

Implementation of Multiple-target LFMCW Vehicle Forward Anticollision Radar

为主动减少高速公路上碰撞事故的发生,提出一种基于FPGA和DSP芯片的车载前向防撞雷达系统的实时处理方案。分别介绍了LFMCW雷达的基本原理、系统硬件架构、信号处理流程,给出了实测数据的结果分析。系统采用MTD-频域配对法来实现对目标参数的估计,实测数据结果不仅验证了算法的有效性,而且表明系统能够准确实时地检测出前面目标车辆的距离与速度信息。该方法可以应用到LFMCW防撞雷达系统当中,从而给驾驶员提供前方道路行驶参考,以达到减少交通事故的目的。

In order to take the initiative to reduce collision accidents on the highway, a real time processing project of the vehicle forward anticollision radar based on FPGA and DSP is proposed in this paper. The basic theory of the LFMCW radar, the system hardware architecture and the signal processing are respectively introduced in the paper, by the end, the analysis of the real data re- sult is given. MTD frequency domain matching is used to estimation of the target parameter. Experimental results validate effective- ness of the algorithm and show that the system can detect the real time distance and velocity information of the front vehicles accu- rately. The method can be used in the LFMCW vehicle anticollision radar system, so it will give the drivers the driving reference of the front road to decrease the traffic accident.