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利用重复序列和循环前缀的OFDM频率同步算法

Synchronization Algorithm for OFDM Frequency with Repeated Sequence and Cyclic Prefix
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摘要 介绍了OFDM系统模型,提出了一种Michele Morelli算法和循环前缀相结合的频率同步新算法,经理论分析,对基于重复序列结构的几种算法性能进行仿真分析.结果显示:不论是在高斯信道还是在瑞利多径衰落信道下,所提出的算法均能得到较好的方差性能. OFDM technology has been used in various high speed wide bandwidth wireless system. However, it is more sensitive to frequency offset and time offset than the single carries system; therefore, time-frequency synchronization is the key technology in the OFDM system. A method of frequency offset estimation for OFDM systems based on document [ 4 ] is proposed in this paper. Both theoretical analysis and simulation show that the performances of the variance of the proposed method are better than the others＇ methods whether in an AWGN or in a Rayleigh channels with smaller SNR, respectively.
作者 张文超 曾凡鑫 龙秀虹
机构地区 重庆通信学院
出处 《重庆工学院学报（自然科学版）》 2009年第12期62-64,76,共4页 Journal of Chongqing Institute of Technology
基金 国家自然科学基金资助项目(60872164)
关键词 正交频分复用 频偏估计 重复序列 循环前缀 OFDM frequency offset estimation repeated sequence cylic prefix
分类号 TN409 [电子电信—微电子学与固体电子学]
  • 相关文献

参考文献6

  • 1Jan-Jaap Van de Beek , Magnus Sandell, Per Ola Borjesson. ML estimation of time and frequency offset in OFDM Systems [ J ]. IEEE Trans . Signal Processing, 1997, 45 : 1800 - 1805.
  • 2Michele Morelli. An improved frequency offset estimator for OFDM applications [ J ]. IEEE communications letters, 1999, 3(3):75-77.
  • 3Helmut Bolcskei. Blind estimation of symbol timing and cartier frequency offset in wireless OFDM systems [ J ].IEEE transactions on communication, 2001, 49 (6): 988 - 999.
  • 4严春林,李少谦,唐友喜,房家奕,罗霄.利用重复序列和循环前缀的OFDM频率同步新方法[J].电波科学学报,2005,20(6):844-848. 被引量：3
  • 5F. Tufvesson, M. Faulkner, O. Edfors. Time and frequency synchronization for OFDM using PN- sequence preambles [ C ] // Proceedings of IEEE Vehicular Technology Conference. Amsterdam: The Netherlands, 1999 : 2203 - 2207.
  • 6P. H. Moose. A technique for orthogonal frequency division multiplexing frequency offset correction [ J ]. IEEE transactions on commun, 1994, 42(10) :2908 - 2914.

二级参考文献12

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重庆工学院学报（自然科学版）
2009年 第12期

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