{"title":"A fast and accurate algorithm for estimating frequency of a sine wave under low-signal-noise-ratio background","authors":"Kaichun Re, Yaqing Tu, Xuanqi Zhang","doi":"10.1109/WCICA.2004.1343304","DOIUrl":null,"url":null,"abstract":"A new method of estimating frequency of a sine wave with the existence of serious Gaussian noise is proposed in this paper, in which the accurately-estimated frequency is obtained by two procedures as coarse search and fine search based on DFT and interpolation. The method is used to estimate the beat frequency of a LFMCW radar liquid-level gauge and its distance-resolution is up to 0.3 mm under noise background as serious as -32 db of signal-noise-ratio. The method, proved by simulation results, is of high accuracy and capable of being used as an on-line way of frequency estimation.","PeriodicalId":331407,"journal":{"name":"Fifth World Congress on Intelligent Control and Automation (IEEE Cat. No.04EX788)","volume":"4 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2004-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Fifth World Congress on Intelligent Control and Automation (IEEE Cat. No.04EX788)","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/WCICA.2004.1343304","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0
Abstract
A new method of estimating frequency of a sine wave with the existence of serious Gaussian noise is proposed in this paper, in which the accurately-estimated frequency is obtained by two procedures as coarse search and fine search based on DFT and interpolation. The method is used to estimate the beat frequency of a LFMCW radar liquid-level gauge and its distance-resolution is up to 0.3 mm under noise background as serious as -32 db of signal-noise-ratio. The method, proved by simulation results, is of high accuracy and capable of being used as an on-line way of frequency estimation.