Journal of South China University of Technology (Natural Science Edition) ›› 2005, Vol. 33 ›› Issue (8): 49-53.

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Channel Estimation and Equalization in OFDM System with Phase Noise

Zhang Hao1  Ye Wu1  Wang Heng-hui1  Tong Tiao-sheng2   

  1. 1.College of Electronic and Inform ation Engineering,South China Univ. of Tech.,Guangzhou 510640,Guangdong,China;2.College of Electric and Inform ation,Hunan Univ.,Changsha 410082,Hunan,China
  • Received:2004-10-26 Online:2005-08-25 Published:2005-08-25
  • Contact: 张浩(1975-)，男，博士生，主要从事下一代移动终端设计研究 E-mail:zsumei@21 cn.corn
  • About author:张浩(1975-)，男，博士生，主要从事下一代移动终端设计研究
  • Supported by:

    国家自然科学基金资助项目(60272051)；广东省自然科学基金资助项目(31391)

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Abstract:

By analyzing the effect of phase noise on the OFDM system,it is found that phase noise results in not only common phase error(CPE)but also intercarrier interference(ICI)that degrade the performance of the OFDM system.The effect of phase noise on the orthogonal frequency division mutliplexing(OFDM)system is analyzed.Phase noise results in not only CPE but also ICI that degrade the perform ance of the OFDM system.Hence the corrections of CPE and ICI must be carried out.In this paper,a CPE corection method based on the MSE criterion is first given.As ICI mainly results from the adjacent channels,a method of adaptively eliminating the adjacent chan. nel interference is then put forward based on the LMS law.Th e proposed algorithm is simple and efficient,whose efect on the perform ance improvement of the OFDM system is finally verified by simulated results simulation resuhs

Key words: orthogonal frequency division mutliplexing, common phase eror, intercarrier interference, channel estimation