%0 Journal Article
%T Frequency measurement algorithm of two spectral phases difference based on Flat-top window<br>基于Flat-top窗的双谱线相位差频率测量算法
%A LIN Da-bin
%A JIANG Ya-qun
%A HUANG Chun
%A WU Le-peng
%A HUANG Juan
%A <br>林达斌
%A 江亚群
%A 黄　纯
%A 吴乐鹏
%A 黄　娟
%J 计算机应用研究
%D 2012
%I 
%X Taking Flat-top window for a example,this paper analyzed its spectral characteristics of sidelobes and made a double-line phase based on the weighted harmonic correction algorithm to obtain the frequency offset.Firstly,it sampled N point signal,then extracted N/2 odd and N/2 even point signal to run FFT,which could get the phase of the maximum line and sub-maximum line spectra respectively.Lastly,it obtained frequency of harmonic with the phase-weighted difference.The simulation results show that the algorithm can effectively reduce estimation error in phasor parameters and improve detection accuracy of the harmonic.
%K harmonics
%K spectral leakage
%K two spectral lines
%K phase-weighted
%K frequency offset
%K windowed and interpolation<br>谐波
%K 频谱泄露
%K 双谱线
%K 相位加权
%K 频率偏移
%K 加窗插值
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=8240383F08CE46C8B05036380D75B607&jid=A9D9BE08CDC44144BE8B5685705D3AED&aid=AB480754FB5F26FE698557C6A6A2CCD4&yid=99E9153A83D4CB11&vid=771469D9D58C34FF&iid=B31275AF3241DB2D&sid=8B7EC896EBC8E8C4&eid=25F460E3298FB693&journal_id=1001-3695&journal_name=计算机应用研究&referenced_num=0&reference_num=21