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

The Korean Institute of Commucations and Information Sciences (한국통신학회)
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A study on the target PER for system using H-ARQ scheme

H-ARQ 방법이 적용된 시스템에서 Target PER에 관한 연구

  • 송경식 (경희대학교 전자정보학부) ;
  • 권동승 (한국전자통신연구원 무선방송기술연구소) ;
  • 홍인기 (경희대학교 전자정보학부) ;
  • 박한규 (연세대학교 전기전자공학과)
  • Published : 2003.04.01
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Abstract

In this paper, the target FER is derived to achieve the maximum throughput in H-ARQ scheme where the FEC and ARQ are properly combined and proved through the simulation. In numerical analysis, The average upper bound on the FER(Frame Error Rate) of turbo code is derived and the throughput is expressed in terms of this bound. Then, the throughput is differentiated with respect to the FER and the optimal target PER is achieved. As a result of analysisw, the throughput is maximized at the target FER of 6% whereas the target PER is set to 5% in the current 3GPP2 specification.

H-ARQ를 적용한 시스템에서 최대 수율(throughput)을 얻기 위한 Target PER을 수치적 해석 방법을 이용하여 구하였고 시뮬레이션 과정을 통하여 검증하였다. 수치적 해석 방법을 위하여 chase combine의 효과는 해밍 거리가 증가하는 효과로 간주하였고 이를 바탕으로 수율 계산식과 터보 부호에서 평균 상호값(Average upper bound)을 이용한 PER간의 연계식을 유도하여 최적의 Targer PER값을 구했다. 그 결과 H-ARQ방법이 적용된 경우 현재 3GPP2 표준에 선정되어 있는 5%에 비해 더 높은 6% target PERㅇ에서 최대 수율이 나타나는 결과를 확인할 수 있었다.

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References

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