Journal of information and communication convergence engineering

The Korea Institute of Information and Commucation Engineering (한국정보통신학회)
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Iterative V-BLAST Decoding Algorithm in the AMC System with a STD Scheme

  • Lee, Keun-Hong (Dept. of Computer Media, Hanyeong College) ;
  • Ryoo, Sang-Jin (Dept. of Computer Media, Hanyeong College) ;
  • Kim, Seo-Gyun (Institute for information technology advancement) ;
  • Hwang, In-Tae (Chonnam National University, School of Electronics & Computer Engineering)
  • Published : 2008.03.31
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Abstract

In this paper, we propose and analyze the AMC (Adaptive Modulation and Coding) system with efficient turbo coded V-BLAST (Vertical-Bell-lab Layered Space-Time) technique. The proposed algorithm adopts extrinsic information from a MAP (Maximum A Posteriori) decoder with iterative decoding as a priori probability in two decoding procedures of V-BLAST scheme; the ordering and the slicing. Also, we consider the AMC system using the conventional turbo coded V-BLAST technique that simply combines the V-BLAST scheme with the turbo coding scheme. And we compare the proposed decoding algorithm to a conventional V-BLAST decoding algorithm and a ML (Maximum Likelihood) decoding algorithm. In addition, we apply a STD (Selection Transmit Diversity) scheme to the systems for better performance improvement. Results indicate that the proposed systems achieve better throughput performance than the conventional systems over the entire SNR range. In terms of transmission rate performance, the suggested system is close in proximity to the conventional system using the ML decoding algorithm.

Keywords

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