FMCW雷达快速高精度测距算法

在FMCW雷达测距系统中，单纯采用FFT方法通过峰值点确定单频信号频率时，要想提高精度就必须增加采样点数，结果使得提高测量精度和降低计算量成为矛盾，限制了FMCW雷达在高精度实时测距方面的应用，本文提出一种将FFT与Chirpz相结合提高FMCW雷达测距精度的新算法，理论计算和在Matlab下仿真表明，此算法可显著提高计算效率和精度。

A Method of the Realization of High Accuracy in FMCW Ranging System

This paper summarizes the methods and their character in the field of FMCW ranging.And I put forward new method in this paper.When we want to know the frequency of a single-frequency signal by the extreme absolute value of its DFT,the amount of computation and precision increase together.Actually,to get the frequency of single-frequency signal by the extreme absolute value of its DFT we waste the computation.I mean that only a few point of DFT can provide information.On the basis of DFT we can get the interval which the peak value lies in,and then do CZT on the interval.This can reduce a large amount of computation.