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

The Korean Institute of Commucations and Information Sciences (한국통신학회)
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An Efficient Adaptive Modulation and Coding Scheme on Downlink Rayleigh Fading Channels Considering Channel-State-Information Feedback Delay

하향 링크 레일리 감쇄 채널에서의 채널 상태 정보 궤환 지연을 고려한 효율적인 적응 전송 기법

  • 이두호 (연세대학교 전기전자공학과) ;
  • 황해광 (연세대학교 전기전자공학과) ;
  • 상영진 (연세대학교 전기전자공학과) ;
  • 김광순 (연세대학교 전기전자공학과)
  • Published : 2006.11.30
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Abstract

In downlink of mobile communication systems, the feedback delay between channel estimation and actual transmission causes inaccuracy in channel-state-information (CSI) and this results in performance degradation. In order to overcome this phenomenon, channel prediction is inevitable. In this paper, an adaptive transmission scheme based on channel prediction is proposed and its performance is evaluated. From simulation results, it is shown that the performance degradation due to the feedback delay is successfully mitigated by using the proposed scheme.

하향 링크 이동통신 시스템에서, 채널 추정 시점과 실제 전송 시점 사이의 시간 지연으로 인해 채널 상태 정보의 정확도가 떨어지게 되고 이는 성능 열화로 이어진다. 이를 극복하고 전송률을 극대화하기 위해 채널 예측이 필수적이다. 본 논문에서는 채널 예측을 통한 적응 전송 기법을 제안하고 성능을 분석한다. 모의 실험을 통해 제안한 기법이 궤환 지연으로 인한 성능 열화를 극복하는데 효율적임을 보였다.

Keywords

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