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.
出处
《电子科技大学学报》
EI
CAS
CSCD
北大核心
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
关键词
正交频分复用
频率同步
PN序列
衰落信道
orthogonal frequency division multiplexing
frequency synchronization
PN sequence
fading channel