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

The Korean Institute of Commucations and Information Sciences (한국통신학회)
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Efficient Hybrid ARQ with Space-Time Coding and Low-Complexity Decoding

Space-Time Coding과 낮은 복잡도의 복호 방범을 사용한 효과적인 Hybrid ARQ 기법

  • 오미경 (한국과학기술원 전자전산학과 정보처리시스템 연구실) ;
  • 권영현 (한국과학기술원 전자전산학과 정보처리시스템 연구실) ;
  • 박동조 (한국과학기술원 전자전산학과 정보처리시스템 연구실)
  • Published : 2005.12.01
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Abstract

We aim at increasing the throughput of the hybrid automatic retransmission request (HARQ) protocol in Space-Time (ST) coded multi-antenna transmission systems. By utilizing reliability information at the decoder, we obtain an improved probability of successful decoding, which enhances the overall system throughput at low-complexity. Simulations and analytical results demonstrate the performance of our scheme in impulse noise environment as well as AWGN and fading multi-input multi-ouput (MIMO) channels.

본 논문에서는 Space-Time code를 사용하는 다중 안테나 시스템에서 Hybrid automatic retransmission request (HARQ)의 처리능력(throughput)을 향상시키는 기법을 제안한다. 우선 낮은 복잡도를 가지는 Hard decision decoding (HDD) 방법에서 신뢰도 정보를 이용하여 복호 성능을 높일 수 있는 알고리즘을 제안한다. 이렇게 제안된 알고리즘을 HARQ 프로토콜을 사용하는 시스템에 사용하여 낮은 복잡도를 유지하면서 전체 처리능력을 향상시킬 수 있도록 한다. 제안된 기법의 성능을 확인하기 위하여 처리능력을 수학적으로 분석하였으며, 모의실험을 통해 AWGN 채널 및 페이딩이 있는 다중입력 다중출력 채널뿐만 아니라 Impulse 잡음이 있는 환경에서도 성능이 향상됨을 확인하였다.

Keywords

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