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

The Korean Institute of Commucations and Information Sciences (한국통신학회)
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Regularized Channel Inversion for Multiple-Antenna Users in Multiuser MIMO Downlink

다중 안테나 다중 사용자 하향 링크 환경에서 Regularized Channel Inversion 기법

  • 이흔철 (삼성 종합기술원) ;
  • 이광원 (고려대학교 공과대학 전기전자전파공학부 무선통신 연구실) ;
  • 이인규 (고려대학교 공과대학 전기전자전파공학부 무선통신 연구실)
  • Received : 2009.09.04
  • Accepted : 2010.03.08
  • Published : 2010.03.31
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Abstract

Channel inversion is one of the simplest techniques for multiuser downlink systems with single-antenna users. In this paper, we extend the regularized channel inversion technique developed for the single-antenna user case to multiuser multiple-input multiple-output (MIMO) channels with multiple-antenna users. We first employ the multiuser preprocessing to project the multiuser signals near the null space of the unintended users based on the MMSE criterion, and then the single-user preprocessing is applied to the decomposed MIMO interference channels. In order to reduce the complexity, we focus on non-iterative solutions for the multiuser transmit beamforming and use a linear receiver based on an MMSE criterion. Simulation results show that the proposed scheme outperforms existing joint iterative algorithms in most multiuser configurations.

Keywords

References

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