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

The Korean Institute of Commucations and Information Sciences (한국통신학회)
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Recursive Nullspace Calculation for Multiuser MIMO Systems

다중 사용자 MIMO 시스템을 위한 순차적 영공간 계산

  • 정진곤 (한국과학기술원 전자전산학과 디지털통신 연구실) ;
  • 이용훈 (한국과학기술원 전자전산학과 디지털통신 연구실)
  • Published : 2007.12.31
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Abstract

The computational complexity for the zero-forcing (ZF)-based multiuser (MU) multiple-input multiple-output(MIMO) preprocessing matrices can be immoderately large as the number of transmit antennas or users increases. In this paper, we show that the span of singular vector space of a matrix can be obtained from the singular vectors of the parted rows of that matrix with computational saving and propose a computationally efficient recursive-algorithm for achieving the ZF-based preprocessing matrices. Analysis about the complexities shows that a new recursive-algorithm can lighten the computational load.

본 논문에서는 zero-forcing (ZF) 기반 다중 사용자 MIMO (multiple-input multiple-output) 시스템에서, 송신-처리-행렬을 구하기 위한 간단한 순차적 (recursive) nulling 행렬 계산 알고리즘을 제안한다. 제안한 방식은 채널 행렬의 부분 행렬을 써서 구한 nulling 행렬을 이용하여 전체 행렬의 nulling 행렬과 송신-처리-행렬을 구하는 방식으로써, 전체 채널 행렬을 이용하여 송신-처리-행렬을 구하는 기존 방식에 비해 계산량을 줄일 수 있다.

Keywords

References

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