%0 Journal Article
%T Frequency offset estimation algorithm of OFDM system<br>OFDM系统的频偏估计算法
%A JI Lei
%A LI Yu-bai
%A <br>吉磊
%A 李玉柏
%J 计算机应用研究
%D 2011
%I 
%X Carrier frequency offset will destroy the orthogonality among every subcarrier of orthogonal frequency division multiplexing (OFDM) system, and bring interchannel interference (ICI) and intersymbol interference (ISI). Combining with the frame structure of China mobile multimedia broadcasting CMMB1], this essay introduces an integer frequency offset (IFO) acquiring algorithm using conjugate multiplication between adjacent symbols. At last, a least-squares approximation algorithm is introduced to acquire the sampling frequency offset and the residual frequency offset. The computer simulation proves that least-squares approximation can get precise results.
%K 正交频分复用
%K 中国移动多媒体广播
%K 频率同步
%K 整数倍频偏
%K 残余频偏
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=8240383F08CE46C8B05036380D75B607&jid=A9D9BE08CDC44144BE8B5685705D3AED&aid=A0225C139D8B41CDB2CA6FA2704C9311&yid=9377ED8094509821&vid=D3E34374A0D77D7F&iid=E158A972A605785F&sid=01AFAE7A0B7C782E&eid=D33D183F2D768286&journal_id=1001-3695&journal_name=计算机应用研究&referenced_num=0&reference_num=7