Journal of South China University of Technology(Natural Science Edition) ›› 2012, Vol. 40 ›› Issue (3): 43-48,63.

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

Effect of Carrier Frequency Offset on Performance of MIMO-OFDM Systems in the Presence of Channel Estimation Error

Li Ju-hu  Chen Peng  He Zhi-qiang  Wu Wei-ling   

  1. Key Laboratory of Universal Wireless Communications of the Ministry of Education,Beijing University of Posts and Telecommunications,Beijing 100876,China
  • Received:2011-07-26 Revised:2011-10-17 Online:2012-03-25 Published:2012-02-01
  • Contact: 李巨虎(1978-) ，男，博士生，主要从事MIMO 无线通信研究． E-mail:ljuhu78@163.com
  • About author:李巨虎(1978-) ，男，博士生，主要从事MIMO 无线通信研究．
  • Supported by:

    国家重点基础研究发展计划项目( 2009CB320401) ; 新一代宽带无线移动通信网科技重大专项( 2010ZX03003-003-01， 2012ZX03004005-002)

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Abstract:

In MIMO-OFDM systems,channel estimation error and carrier frequency offset are two objective existing factors. In order to investigate the effect of carrier frequency offset on the performance of MIMO-OFDM systems in the presence of channel estimation error,zero-forcing detectors and an approximation to the Wishart distribution are used to theoretically deduce the signal-to-interference-plus-noise ratio and its probability distribution for the system in the presence of estimation errors of Rayleigh and Rician fading channels,and the average error probability as well as the outage probability of the system is further obtained. Simulated results indicate that,in the presence of channel estimation error,even a small carrier frequency offset may greatly impact the performance of MIMO-OFDM systems.

Key words: MIMO-OFDM system, Wishart distribution, carrier frequency offset, channel estimation error