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

The Korean Institute of Commucations and Information Sciences (한국통신학회)
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Turbo Coded MIMO System with Adaptive Turbo Space- Time Processing for High-Speed Wireless Communications

고속 무선 통신을 위한 적응형 터보 시공간 처리를 갖는 터보 부호화된 다중 입출력 시스템

  • 조동균 (연세대학교 전기전자공학과 통신시스템연구실) ;
  • 김상준 (연세대학교 전기전자공학과 통신시스템연구실) ;
  • 박주남 (연세대학교 전기전자공학과 통신시스템연구실) ;
  • 황금찬 (연세대학교 전기전자공학과 통신시스템연구실)
  • Published : 2003.09.01
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Abstract

Turbo coding and turbo processing have been known as methods close to Shannon limit in the aspect of wireless MIMO communications similarly to wireless single antenna communication. The iterative processing can maximize the mutual effect of coding and interference cancellation, but turbo coding has not been used for turbo processing because of the inherent decoding process delay. This paper proposes a turbo coded MIMO system with adaptive turbo parallel space-time (Turbo-PAST) processing for high-speed wireless communications and a enhanced cyclic redundancy check (E-CRC) scheme as an efficient and simple priori stopping criterion. Simulation results show that the Turbo-PAST outperforms conventional system with 1.3dB and the proposed E-CRC scheme effectively reduces the amount of turbo processing iterations from the point of average number of iterations.

터보 부호와 터보 처리는 무선 단일 입출력 통신 시스템과 마찬가지로 무선 다중 입출력 통신 시스템에서도 재귀 처리를 통하여 Shannon Limit에 근접하는 방법으로 알려져 왔다. 재귀 처리는 복호와 간섭 제거의 상호 영향을 극대화시킬 수 있으나 터보 부호는 복잡도와 내부의 복호 처리의 지연으로 인해 터보 처리에 사용되지 않고 있다. 본 논문에서는 고속 무선 통신을 위한 적응형 Turbo-PAST 처리를 갖는 터보 부호화된 다중 입출력 시스템과 효율적인 조기 정지 기법으로 E-CRC 기법을 제안한다. 시뮬레이션 결과는 Turbo-PAST가 기존 시스템보다 1.3dB 뛰어나고 제안된 E-CRC 기법은 평균 재귀 횟수 관점에서 터보 처리의 재귀를 약 1회정도 줄이는 것을 보여준다.

Keywords

References

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