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

  • 제34권5A호
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  • Pages.408-413
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  • 2009
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  • 1226-4717(pISSN)
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  • 2287-3880(eISSN)
한국통신학회 (The Korean Institute of Commucations and Information Sciences)
권호 표지

여러 사용자 양방향 통신을 위한 MMSE-기반 중계 기법

MMSE-Based Relaying Method for Multiuser Bidirectional Communications

  • 정진곤 (캘리포니아대학 적응시스템연구실)
  • 발행 : 2009.05.31
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초록

본 논문에서는 평균제곱오차(mean-square-error)를 최소화하며, 여러 사용자 양방향 통신(bidirectional communications)을 지원하는, 증폭-후-전달(amplify-and-forward) 중계기의 송수신 가중치 행렬을 제안한다. 또한, 시스템 전송량을 최대화하는 각 사용자 빔포밍(beamforming) 벡터를 설계한다. 모의실험을 통해 제안한 중계기 가중치로 여러 사용자간 상호채널간섭(co-channel interference)과 양방향 통신에서 발생하는 자기간섭(self-interference)을 효과적으로 줄일 수 있음을 보이고, 또한, 제안한 빔포밍 방식이 공간 다중화(spatial multiplexing) 방식에 비해 증폭-후-전달 중계기 양방향 통신에 적합함을 확인하였다.

In this paper, minimum mean-square-error (MMSE)-based transceiver processing of a bidirectional amplify-and-forward (AF) relay having multiple antennas is proposed. Besides, the optimal beamforming vectors of users are designed in the sense of the sum rate maximization. Simulation results show that the proposed relay processing can effectively reduce both co-channel interferences and self-interferences and that the proposed beamforming method is proper to the bidirectional communication employing the AF relay.

키워드

참고문헌

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