The Journal of Korean Institute of Communications and Information Sciences (한국통신학회논문지)

The Korean Institute of Commucations and Information Sciences (한국통신학회)
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Joint OSIC and Soft ML Decoding Scheme for Coded Layered Space-Time OFDM Systems

  • Lee, Hye-Jeong (Portable Internet Development Department in Network Infra Lab., KT) ;
  • Chung, Jae-Ho (Portable Internet Development Department in Network Infra Lab., KT) ;
  • Park, Se-Jun (Portable Internet Development Department in Network Infra Lab., KT) ;
  • Lee, Seong-Choon (Portable Internet Development Department in Network Infra Lab., KT)
  • Published : 2008.05.31
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Abstract

In this paper, we consider coded layered space-time architecture in MIMO-OFDM channels. Vertical Bell Lab Layered Space-Time(V-BLAST) scheme employing ordered successive interference cancellation(OSIC) algorithm provides very high spectral efficiency with low computational complexity. However, the error propagation is a major drawback constraining the overall performance of the V-BLAST system significantly. Based on this problem, we derive an improved detector using soft bit log-likelihood ratio(LLR) value. Simulation results show that the proposed detector outperforms the conventional V-BLAST scheme under spatially uncorrelated as well as correlated fading channels.

Keywords

References

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