Journal of South China University of Technology (Natural Science Edition) ›› 2010, Vol. 38 ›› Issue (5): 6-10.doi: 10.3969/j.issn.1000-565X.2010.05.002

• Electronics, Communication & Automation Technology • Previous Articles     Next Articles

Elimination of Carrier Frequency Offset in Uplink OFDMA System Based on TD-LMS Algorithm

Guan Qing-yang  Zhao Hong-lin  Guo Qing   

  1. Communication Research Center,Harbin Institute of Technology,Harbin 150001,Heilongjiang,China
  • Received:2009-04-10 Revised:2009-06-04 Online:2010-05-25 Published:2010-05-25
  • Contact: 关庆阳（1982-），男，博士生，主要从事无线通信物理层研究． E-mail:guan_qy@163．com
  • About author:关庆阳（1982-），男，博士生，主要从事无线通信物理层研究．
  • Supported by:

    国家自然科学基金资助项目（60532030）

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Abstract:

A time-domain adaptive algorithm based on least mean square（TD-LMS） is proposed to eliminate the interference due to the carrier frequency offset（CFO） from different users in uplink OFDMA（Orthogonal Frequency Division Multiple Access） system.In this algorithm,the CFO in time domain is estimated and is adjusted with an estimator.Then,the residual CFO is eliminated with TD-LMS scheme in time domain.Simulated results indicate that,as compared with the algorithm based on least square,the proposed algorithm is effective in eliminating the CFO of users,with a gain of 3dB in the same simulation conditions.

Key words: orthogonal frequency division multiple access, carrier frequency offset, time domain, signal-to-noise ratio