现代电子技术2018，Vol.41Issue(7)：8-11,4.DOI:10.16652/j.issn.1004-373x.2018.07.003
一种基于二分法和SDFT的FMCW雷达高精度测距方法
A dichotomy and SDFT based high-precision range-finding method of FMCW radar
摘要
Abstract
In order to improve the range-finding accuracy of the FMCW(frequency modulated continuous wave)radar,a method combining SDFT(shifted discrete Fourier transform)and dichotomy is proposed to search the peak frequency point, which can reduce the range-finding error caused by the inherent sampling interval of traditional FFT. The FFT processing is used to limit the spectral peak within two frequency points,and then the dichotomy and SDFT are used to search the peak value step by step,which can further improve the spectrum analysis accuracy of the difference frequency signal and range-finding accuracy without increasing the calculation amount. The validity of the method was verified with simulation analysis. The simula-tion results show that the method can meet the practical demands of high-precision range-finding.关键词
频率估计/二分法/SDFT/FMCW雷达/差频信号/测距方法Key words
frequency estimation/dichotomy/SDFT/FMCW radar/difference frequency signal/range-finding method分类
信息技术与安全科学引用本文复制引用
魏晓会,谢锡海..一种基于二分法和SDFT的FMCW雷达高精度测距方法[J].现代电子技术,2018,41(7):8-11,4.基金项目
国家科技攻关计划(2014K05-20) Project Supported by National Key Technologies R&D Program of China(2014K02-20) （2014K05-20）
