고정된 복호 후 재전송 릴레이를 위한 Long-term 페이딩 기반의 전력할당 기법 = Long-term Fading Statistics-Based Power Allocation for Fixed Decode-and-Forward Relays

다국어 초록 (Multilingual Abstract)

This paper considers 2-hop wireless cooperative communications networks with fixed decode-and-forward
relays. Specifically, we first derive the closed-form BER expression for theoretically evaluating the end-to-end
performance of these networks. Then, based on this expression and long-term fading statistics, we propose a
power allocation method for source and relay. Such a method brings about multiple advantages in term of
spectral efficiency and implementation complexity over other power allocation methods based on instantaneous
fading statistics. A variety of numerical results reveal that the cooperative communications scheme with the
proposed power allocation significantly outperforms that with the equal power allocation and

국문 초록 (Abstract)

본 논문은 복호 후 재전송의 고정된 릴레이를 가진 2-홉 무선 협력통신 네트워크를 고려한다. 첫 번째로 네트워크의 단대단 성능을 이론적으로 평가하기 위해 closed-form BER 표현을 유도한다. 또한, closed-form BER 표현과 long-term 페이딩 통계를 근거로 하여 소스와 릴레이에 적합한 전력할당 방법을 제안한다. 이러한 방법은 instantaneous 페이딩 기반의 다른 전력할당 방식에 비하여 주파수 효율성과 구현의 복잡도 측면에서 다양한 장점을 가진다, 그리고 동일한 총 전송전력을 가지는 릴레이 네트워크에서 제안하는 전력할당 방식의 협력통신 기법이 동등한 전력 할당방식의 직접전송 기법보다 월등히 좋은 성능을 가진다는 것을 수학적 결과로 나타내었다.

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