近程小扇区雷达在汽车防撞中的应用研究

Research on the Application of Short-range and Narrow Field View Radar to the Automobile Anti-collision

在雷达观测基线受限且波束不扫描的条件下,近程小扇区内多个独立运动目标的分辨、定位、跟踪和参数估计等,是雷达探测技术领域中亟待解决的理论问题,更是汽车防撞雷达等应用中需要突破的技术难点,线性调频连续波(LFMCW)信号形式可以实现近程、无盲区、高分辨、高精度探测和距离信息获取,能够有效解决近程小扇区雷达面临的问题.分析了汽车防撞雷达中近程小扇区雷达的原理,对汽车防撞雷达的需求和体制进行了阐述;提出了汽车防撞雷达的参数选择和系统设计,并分析了其工作原理.

Under limited observation baseline and without scanning beam, the problems of distinguishing multiple independent moving targets, parameters estimation, target tracking in the short-range narrow field of view （FOV）, are not only urgent to solve theory of radar detection, but also cause dificuhies to the application of anticollision radar.The linear frequency-modulated continuous wave （LFMCW） takes advantages of the simple structure, none range blind zone and high resolution in short range of LFMCW radar, and realized high-resolution detection and precise orientation, which can validly solve the problems that the short-range narrow field of view （FOV）has been confronted. The principle of the short-range narrow field of view （FOV） in automobile anti-collision is analyzed in this paper. The demand and the system for the automobile anti-collision radar are presented. The choosing of parameter and the system design for the automobile anti-collision radar are proposed, and its principle of work is analyzed.