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

  • 제50권3호
  • /
  • Pages.9-15
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  • 2013
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  • 2287-5026(pISSN)
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  • 2288-159X(eISSN)
대한전자공학회 (The Institute of Electronics and Information Engineers)
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무선 애드혹 네트워크에서의 간섭 제어 수신 기법

Interference Aware Receiver Filtering for Wireless Ad Hoc Networks

  • 신성필 (고려대학교 정보통신대학 컴퓨터.전파통신공학과) ;
  • 이병주 (고려대학교 정보통신대학 컴퓨터.전파통신공학과) ;
  • 박선호 (고려대학교 정보통신대학 컴퓨터.전파통신공학과) ;
  • 심병효 (고려대학교 정보통신대학 컴퓨터.전파통신공학과)
  • 투고 : 2012.10.19
  • 발행 : 2013.03.25
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초록

근래 애드혹 네트워크에서 송신 노드가 하나의 안테나만을 가지고 있을 지라도 다수의 수신 안테나로 선형적인 네트워크 throughput에 근접한 값을 얻을 수 있음이 보여졌다. 본 논문에서는 수신 노드에서 채널 상태 정보 (channel state information at reciever, CSIR)가 주어지지 않았을 때, 비모수 기반 선형 평균 제곱오차 (MMSE) 수신기를 사용하여 안테나 수에 비례하는 선형 이득을 얻는 수신 기법을 제안한다. 제안하는 방법에서는 간섭과 노이즈의 공분산에 관심 있는 채널 정보를 포함하여 전송률의 손실 없이 최적의 MMSE 전송 용량에 근접한 결과를 얻는다. 네트워크 전송 용량에 대한 분석과 모의실험을 통해 제안하는 비모수 기반의 선형 MMSE 수신 기법이 기존의 알고리즘들보다 우수한 성능을 가질 수 있음을 확인할 수 있다.

Recent works on ad hoc network study have shown that achievable throughput can be made to scale linearly with the number of receive antennas even if the transmitter has only a single antenna. In this paper, we propose a non-parametric linear minimum mean square error (MMSE) receiver for achieving further gain in performance when the channel state information at receiver (CSIR) of interferers is imperfect. The key feature to make our approach effective is to exploit the autocorrelation of the received signal. In fact, by incorporating the desired channel information on top of the observations including interference and noise only, the proposed method achieves large fraction of the optimal MMSE transmission capacity without transmission rate loss. From the SINR analysis as well as transmission capacity simulations in realistic ad hoc network system, we show that the proposed non-parametric linear MMSE receiver brings substantial performance gain over existing multiple receive antenna algorithms.

키워드

참고문헌

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