Journal of South China University of Technology (Natural Science Edition) ›› 2007, Vol. 35 ›› Issue (9): 11-15.

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

Performance of MIMO-OFDM System ßased on Subcarrier Grouping in Multipath Fading

Yu Hua -wen  Yin jun-xun  Lai Guo-ting   

  1. School of E1ectronic and Information Engineering， South China Univ. of Tech. , Guangzhou 510640 , Guangdong , China
  • Received:2006-10-27 Online:2007-09-25 Published:2007-09-25
  • Contact: 喻华文(1976-) ，男，博士，主要从事无线宽带通信、MIMO-OFDM 技术方面的研究. E-mail:yuhuawen@ 163.com
  • About author:喻华文(1976-) ，男，博士，主要从事无线宽带通信、MIMO-OFDM 技术方面的研究.
  • Supported by:

    国家自然科学基金资助项目(60101002 )

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Abstract:

In the space-time-frequency-coded MIMO-OFDM system , the scheme of subcarrier grouping is adopted to divide the pilot sequence into independent subchannels , and the channel estimation is extended from the spacefrequency dimensions to the space-time-frequency dimensions , thus reducing the complexity of the system codingl decoding and the pilot sequence design. Then , the close-form solution to the Chemoff upper bound of the pairwise error probability is derived for the MIMO-OFDM system with imperfect channel information. The results of the theoretical analysis and numerical simulation show that , in the fading channels , the proposed subcarrier grouping scheme with equal intervals is of good performance because it can attain the results with low coding and decoding complexity by reducing the matrix scale.

Key words: MIMO-OFDM system, channel estimation, space-time-frequency coding, fading , subcarrier grouping