Journal of South China University of Technology (Natural Science Edition) ›› 2011, Vol. 39 ›› Issue (10): 26-31.doi: 10.3969/j.issn.1000-565X.2011.10.005

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

Iterative Algorithm for Phase-Noise Compensation in OFDM Systems

Wu Hao-wei1  Yang Shi-zhong1  Ou Jing-lan2  Yang Li-sheng1   

  1. 1. Center of Communication and Tracking Telemetering and Command,Chongqing University,Chongqing 400044,China; 2. College of Communication Engineering,Chongqing University,Chongqing 400044,China
  • Received:2011-03-29 Revised:2011-07-05 Online:2011-10-25 Published:2011-09-01
  • Contact: 吴皓威(1981-) ，男，博士生，讲师，主要从事宽带无线通信系统物理层技术研究． E-mail:wuhaowei@cqu.edu.cn
  • About author:吴皓威(1981-) ，男，博士生，讲师，主要从事宽带无线通信系统物理层技术研究．
  • Supported by:

    重庆市科技攻关计划项目( CSTC2009AB2167)

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Abstract:

In order to compensate the interference from the phase noise ( PHN) of local oscillators in orthogonal frequency division multiplexing ( OFDM) systems,an iterative algorithm for PHN estimation and equalization is proposed based on the interpolation of estimated common phase error ( CPE) . In this algorithm,based on the slowgoing characteristic of PHN between neighbor symbols,PHN is estimated by acquiring the interpolation of the CPE
estimation. Then,with the estimated PHN as the initial value,the iterative estimations of PHN and data symbols are jointly carried out,thus recovering the modulation symbols. Simulated results show that,as compared with the conventional method based on the CPE coefficient,the proposed algorithm is of better BER ( Bit Error Ratio) performance and lower complexity at the same iterative number. In addition,the proposed algorithm without iteration is superior to the simple non-iteration CPE correction one in terms of BER performance,especially in the environments with severe PHN.

Key words: orthogonal frequency division multiplexing, iteration, phase noise, common phase error, equalization