摘要： 为保证汽车在高速公路上的行车安全，根据线性调频连续波雷达的基本原理，设计实现一种基于数字信号处理技术的毫米波车载前向防撞雷达系统。雷达系统根据简化的二维恒虚警率降低目标检测时的虚警概率，用MTD频域配对法找出同一目标出现在上、下扫频的频谱。实验结果表明，该系统能实时准确地检测前面目标车辆的距离与速度信息，运行稳定可靠。

关键词: 线性调频连续波雷达, 数字信号处理, 现场可编程门阵列, 恒虚警率, MTD频域配对

Abstract: In order to ensure vehicle safety on the highway, a real-time processing scheme of the millimeter-wave onboard forward collision avoidance radar system based on Digital Signal Processing(DSP) is proposed. A simplified two dimension Constant False Alarm Rate(CFAR) is used to decrease false alarm probability in target detection, MTD frequency domain matching is used to find positive sweep frequency spectrum and negative sweep frequency spectrum of the same target correctly. Experimental results show that the system can detect real-time distance and velocity of the forward target vehicle accurately, and it runs reliably.

Key words: Linear Frequency Modulated Continuous Wave(LFMCW) radar, Digital Signal Processing(DSP), Field Programmable Gate Array(FPGA), Constant False Alarm Rate(CFAR), MTD frequency domain matching

中图分类号: 

• TP391