Journal of South China University of Technology (Natural Science Edition) ›› 2006, Vol. 34 ›› Issue (6): 17-20.

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

Iterative Detection Algorithm for V-BLAST

Li Xiao-wei  Wei Gang  Chen Fang-jiong   

  1. College of Electronic and Information Engineering,South China Univ.of Tech.,Guangzhou 510640,Guangdong,China
  • Received:2005-05-19 Online:2006-06-25 Published:2006-06-25
  • Contact: 李小玮(1976-)，男，博士生，主要从事无线通信信道编码方面的研究 E-mail:lixw1120@hotmail.com
  • About author:李小玮(1976-)，男，博士生，主要从事无线通信信道编码方面的研究
  • Supported by:

    国家自然科学基金资助项目(60402014)；广东省自然科学基金资助项目(31390)

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Abstract:

The optimal maximum likelihood(ML)detection of vertical-bell laboratory layered space-time codes (V-BLAST)is dificult to implement and the performances of conventional detection algorithms are limited by error propagation.In order to solve these problems,an iterative detection(ID)method for V-BLAST codes is proposed,in which the soft inform ation of the signals received by multiple antennas is iterated to eliminate the interference.By the proposed method,the effect caused by the error propagation is efficaciously mitigated.Simulated resuhs indicate that the ID method is of quicker convergence speed and better detection perform ance,as compared with the conventional ZF-DFE algorithm.Moreover.it is of a detection perform ance similar to the ML method in low SNR (Signal Noise Ratio)region.

Key words: multi-input multi-output system, vertical-bell laboratory layered space-time codes, iterative detection, soft jnformation