一种利用PN序列的OFDM频率同步  

OFDM Frequency Synchronization by Using PN Sequence

作　　者：严春林[1] 房家奕[1] 唐友喜[1] 李少谦[1] 

机构地区：[1]电子科技大学通信抗干扰技术国家级重点实验室,成都610054

出　　处：《电子科技大学学报》2003年第5期495-498,共4页Journal of University of Electronic Science and Technology of China

基　　金：国家863计划资助项目;编号:2001AA123013;国家自然科学基金;编号:60272009

摘　　要：提出了一种利用PN序列进行OFDM频率估计的新方法。在多径信道中,该方法由于利用了多径信号,提高了频率估计精度。仿真结果显示,其频率估计精度能满足Rayleigh信道下中低速运动时OFDM系统的要求。优点是,当合适选择参数,频率估计范围可达十几个子载波间隔,并且频率同步估计范围和精度可以调节。In this paper we proposed a new OFDM frequency synchronization method by using PN sequence. In multi-path channel, the frequency estimation precision of this method is better than conventional method for it using multi-path signals. The simulation indicates the proposed method can satisfy the demand of OFDM system at moderate moving rate in Rayleigh channel. One of the advantages of this method is that its frequency estimation range can be dozens of subcarrier spacing when the parameters are properly designed. And the frequency estimation range and precision can be adjusted.

关 键 词：正交频分复用 频率同步 PN序列 衰落信道 

分 类 号：TN911[电子电信—通信与信息系统]