高精度测距雷达研究

High Precision Ranging Radar Research

本文介绍一种低成本、高精度线性调频连续波 (LFMCW )测距雷达。对雷达中频信号处理 ,文中提出并采用了“双计数器多周期平均倒数测频”(以下简称双频计 )。整个雷达系统以毫米波一体化前端和单片机为核心 ,使其成为一个集检测、处理、显示、控制于一体的测控系统。实验表明 ,该雷达系统对近距离 (2～ 5 0m)测量 ,其精度可提高 1～ 3个数量级 ,且对振荡器线性度要求不高 (3%左右 )

This thesis introduces a series of low cost high precision Linear Frequency Modulation Continuous Wave(LFMCW)ranging radar.This paper adopts and develops the method of double counter by multiple period average(DCMPA)for processing radar IF signal.It's nucleus is the parts of whole millimeter wave unil and MCS-51.This system becomes a series of detection control system with detection,processing and display.Experiment shows,the radar system ranging precision is advanced to 1～3 orders and it hasn't high demand to oscillator linearity(about 3%).