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

  • 제35권3A호
  • /
  • Pages.260-268
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  • 2010
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  • 1226-4717(pISSN)
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  • 2287-3880(eISSN)
한국통신학회 (The Korean Institute of Commucations and Information Sciences)
권호 표지

다중 안테나 다중 사용자 하향 링크 환경에서 Regularized Channel Inversion 기법

Regularized Channel Inversion for Multiple-Antenna Users in Multiuser MIMO Downlink

  • 이흔철 (삼성 종합기술원) ;
  • 이광원 (고려대학교 공과대학 전기전자전파공학부 무선통신 연구실) ;
  • 이인규 (고려대학교 공과대학 전기전자전파공학부 무선통신 연구실)
  • 투고 : 2009.09.04
  • 심사 : 2010.03.08
  • 발행 : 2010.03.31
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초록

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.

키워드

참고문헌

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