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The Korean Institute of Commucations and Information Sciences (한국통신학회)
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셀룰라 시스템에서의 반복적 간섭 정렬

  • Published : 2015.04.30
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Abstract

본 논문에서는 실제적인 다중 셀 하향링크 네트워크 중 하나인 간섭 브로드캐스트 채널에서 유망한 간섭 정렬 기술인 반복적 간섭 정렬 기술을 소개한다. 또한, 가정하는 네트워크에서 상향링크/하향링크 채널 사이의 채널 상호성을 활용함으로써 다중안테나(MIMO: multiple-input multiple-output) 다중셀 하향링크 네트워크를 위한 개선된 반복적 간섭 정렬 기술을 제안한다. 구체적으로, 제안한 기술은 다중사용자 MIMO 기반 반복적 간섭 정렬 알고리즘을 설계하기 위해 반복적 빔형성과 하향링크 간섭 정렬 이슈를 지능적으로 결합한다. 각 기지국에서는 전처리기를 설계하기 위해 두 개의 순차적인 빔형성 행렬을 사용하는데, 이는 간섭 누수로 불리는 타 셀 기지국으로부터 생성된 셀 간 간섭을 효율적으로 줄일 뿐만 아니라 같은 셀 안에서의 셀 내 간섭을 완벽히 제거가 가능하다. 송신 및 수신 빔형성 행렬은 수렴할 때까지 반복적으로 업데이트된다. 컴퓨터 모의실험을 통해 제안하는 간섭 정렬 기술이 기존 두 가지 반복적 간섭 정렬 기술과 비교하여 더 높은 합 용량을 나타냄을 보인다.

Keywords

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