Journal of the Institute of Electronics and Information Engineers (전자공학회논문지)

The Institute of Electronics and Information Engineers (대한전자공학회)
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Performance Analysis of a Full-Duplex Two-Way Relay Network over Rayleigh Fading Channels

레일레이 페이딩 채널에서 전이중 양방향 중계 네트워크의 성능 분석

  • Choi, Dongwook (Department of Electrical and Computer Engineering, Seoul National University) ;
  • Lee, Jae Hong (Department of Electrical and Computer Engineering, Seoul National University)
  • 최동욱 (서울대학교 전기정보공학부) ;
  • 이재홍 (서울대학교 전기정보공학부)
  • Received : 2013.11.21
  • Published : 2014.03.25
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Abstract

Two-way full-duplex relay network provides improved spectral efficiency by using either superposition coding or physical layer network coding at relays compared to conventional two-way half-duplex relay network. In this paper, we investigate the impact of residual loop interference on the performance of the two-way full-duplex relay network. Users and relays in the two-way full-duplex relay network estimate the residual loop interference in order to cancel it. However, it is difficult to perfectly cancel the residual loop interference from the received signal due to the estimation error. Numerical results show the impact of the estimation error on the outage probability of the two-way full-duplex relay network.

전이중(full-duplex) 양방향(two-way) 중계 네트워크는 전이중 방식을 사용하는 중계기에서 중첩 부호화(superposition coding) 혹은 물리 계층 네트워크 부호화(physical layer network coding)를 사용하여 기존 반이중(half duplex) 중계기를 사용하는 양방향 중계 네트워크에 비해 높은 주파수 효율을 제공한다. 본 논문에서는 전이중 양방향 중계 네트워크를 고려하여 전이중 방식에서 필연적으로 발생하는 루프간섭 신호의 영향을 살펴보았다. 여기에서 사용자 및 중계기는 루프간섭 신호를 제거하기 위해 루프간섭 신호를 추정한다. 하지만 루프간섭 신호를 추정할 때, 추정 오류가 발생하여 수신 신호에서 루프간섭 신호를 완벽하게 제거하기는 어렵다. 모의실험에서는 불능 확률(outage probability)을 통해 이로 인해 발생할 수 있는 성능 변화를 분석하였다.

Keywords

References

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