OFDMA上行链路系统的频偏估计算法

摘要

介绍了正交频分复用多址接入(OFDMA)的优缺点,以及目前应用到的领域.对OFDMA上行链路载波频偏(CFO)估计研究的发展背景和方法分类进行了简要汇总,并对当前估计方法进行了总结分类；给出了带频偏OFDMA上行链路的系统框图和信号模型；且对现有的几种典型频偏估计算法进行了分析和讨论.总结和展望了OFDMA上行链路频偏估计方法的研究方向和关键问题.%Firstly the advantages and disadvantages of orthogonal frequency division multiple access (OFDMA) and the current application fileds are introduced in this paper. Then the development background and methods of carrier frequency off-set(CFO) estimation for OFDMA uplink are summarized and categorized. And the system diagram and the signal model of OFDMA uplink with carrier frequency offset is given. Furthermore, several typical frequency offset estimation algorithms are analyzed and discussed. Finally, the research directions and some key issues about frequency offset estimation of OFDMA uplink system are summarized.