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

The Korean Institute of Commucations and Information Sciences (한국통신학회)
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Performance Bounds of an Amplify-and-Forward Relay System with Multiple Rayleigh-faded Co-channel Interferers

레일리 페이딩을 겪는 다중 간섭 채널 환경에서 증폭-후-전달 릴레이 시스템의 성능 한계

  • 류현석 (고려대학교 전기전자전파공학부 무선정보시스템공학 연구실) ;
  • 강충구 (고려대학교 전기전자전파공학부 무선정보시스템공학 연구실)
  • Received : 2010.12.01
  • Accepted : 2011.01.20
  • Published : 2012.02.29
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Abstract

In this paper, we consider a 2-hop relay system where both the relay and destination nodes suffer from the arbitrary number of co-channel interferers. More specifically, assuming that the relay and access channels as well as interference channels are all subject to Rayleigh fading, we derive an exact closed-form expression for outage probability of the amplify-and-forward (AF) relay system, and furthermore compute its upper and lower bounds. Based on these bounds, we derive the upper and lower bounds on the average bit error rate (BER) of the AF relay system. We also confirm the accuracy of our derivation by investigating the performance gap between the performance bounds under consideration and simulation results.

본 논문에서는 2-홉 릴레이 시스템에서 릴레이 노드와 목적지 노드가 모두 임의의 수를 갖는 간섭원들의 영향을 받는 상황을 고려한다. 특히 릴레이 채널과 액세스 채널, 그리고 간섭 채널들이 모두 레일리 페이딩을 겪는다고 가정할 때, 증폭-후-전달(amplify-and-forward: AF) 릴레이 시스템의 불능 확률에 대한 정확한 수식을 도출하고, 나아가 불능 확률의 상한 식(upper bound)과 하한 식(lower bound)을 도출한다. 또한 도출된 불능 확률의 상한 식과 하한 식을 이용하여 AF 릴레이 시스템의 비트 오류율 성능에 대한 상한 식과 하한 식을 도출한다. 그리고 도출된 AF 릴레이 시스템의 불능 확률과 비트 오류율 성능에 대한 상한 식과 하한 식의 정확도를 모의실험을 통해 확인한다.

Keywords

References

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