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利用训练序列的OFDM时频同步算法 被引量：9

Time and frequency synchronization algorithm using training sequence for OFDM systems
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摘要 针对正交频分复用(OFDM,Orthogonal Frequency-Division Multiplexing)系统中频偏和定时误差对系统性能影响很大,基于对称结构的特殊导频序列和已有的频率同步方法,此文提出了一种改进的时频联合同步算法。该算法利用一个OFDM导频符号可同时实现符号同步和频率同步,因此能提高无线传输的数据传输效率。仿真分析表明,由于时频联合同步算法采用了具有很好相关特性的对称结构的特殊导频序列来实现精确的定时同步,相对S&C算法提高了频偏估计精度。 Frequency offset and timing error seriously influence the performance of the Orthogonal Frequency Division Multiplexing （OFDM） system. Based on the special symmetric pilot sequence and known frequency synchronization methods, an improved timing and frequency synchronization method is presented. By using one OFDM pilot inserted in both time and frequency areas, the method can simultaneously implement timing and frequency synchronization, which can increase the efficiency of wireless data transmission. Simulation and analysis shows, with this special well--correlated symmetric pilot to implement accurate timing synchronization, the frequency offset estimation performance is greatly improved compared with S＆C algorithm.
作者 谭晓衡 王梅梅
机构地区 重庆大学通信工程学院
出处 《重庆大学学报（自然科学版）》 EI CAS CSCD 北大核心 2009年第8期955-959,共5页 Journal of Chongqing University
基金 重庆市自然科学基金资助项目(2008BB2168)
关键词 正交频分复用 同步 训练序列 频偏估计 OFDM systems synchronization training sequence frequency offset estimation
分类号 TN925 [电子电信—通信与信息系统]
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参考文献4

二级参考文献46

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共引文献21

同被引文献47

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引证文献9

二级引证文献26

重庆大学学报（自然科学版）
2009年 第8期

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