车用防撞测距仪鉴频算法的研究

Research of frequency measuring algorithm of vehicle′s bump-preventing telemeter

作为车用防撞测距技术中一个比较重要的环节-鉴频算法决定了测距的精度和实时性。通过对测距原理的剖析,提出了在鉴频算法之前,对信号进行加窗处理,通过分析各种窗口函数对鉴频效果的影响,提出了使用Chebyshev窗函数提高分辨精度和实时性的一种方案,并得到了较好的仿真结果。

Frequency measuring is a basic algorithm in vehicle＇s bump-preventing system. It determines the accuracy and the real-time capability. Base on the theory of the distance measurement, this paper suggests using a window function before frequency measuring. By comparing several window functions, it gives a scheme of how to use Chebyshev window function to improve these performances. And obtain a good simulation result.