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

The Korean Institute of Commucations and Information Sciences (한국통신학회)
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Subspace Interference Alignment by Orthogonalization of Reference Vectors

참조 벡터의 직교화 방법을 이용한 부분공간 간섭 정렬

  • 서종필 (인하대학교 전자공학과 무선이동통신 연구실) ;
  • 김현수 (인하대학교 전자공학과 무선이동통신 연구실) ;
  • 이윤주 (한국전자통신연구원) ;
  • 권동승 (한국전자통신연구원) ;
  • 김지형 (한국전자통신연구원) ;
  • 정재학 (인하대학교 전자공학과 무선이동통신 연구실)
  • Published : 2010.01.31
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Abstract

We propose a subspace interference alignment by orthogonalization of reference vectors. The proposed method improves the sum-rate capacity degradation due to the channel decomposition error and channel estimation error in the real environment. Using the proposed method, each cell uses the reference vector that is orthogonal to the adjacent cells. Then the residual interference produced by the channel decomposition error and the channel estimation error is decreased. The simulation results demonstrate that the proposed method achieves the enhanced sum-rate capacity.

본 논문에서는 셀룰러 환경에서 셀 간 간섭을 완화시키기 위한 부분공간 간섭 정렬 방법을 실제 시스템에 적용할 때 발생하는 채널 분리 오차와 채널 추정 오차에 따른 성능 열화를 개선시키기 위한 수신단 직교화를 통한 간섭 정렬 방법을 제안하였다. 제안된 방법은 셀 마다 서로 직교하는 참조 벡터를 사용함으로써 채널 분리 오차와 채널 추정 오차에 인해 남아있는 간섭신호를 줄여준다. 전산 모의 실험을 통해 채널 추정 오차가 발생하는 환경에서 제안된 방법을 통해 기존의 방법에 비해 향상된 합용량을 얻을 수 있었다.

Keywords

References

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