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

The Korean Institute of Commucations and Information Sciences (한국통신학회)
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A Signal Detection Method for Uplink Multiuser Systems Based on Collaborative Spatial Multiplexing

협력적 공간다중화 기반 상향링크 다중사용자 시스템을 위한 신호검출 기법

  • 임태호 (중앙대학교 전자전기공학부 디지털통신연구실) ;
  • 김영준 (중앙대학교 전자전기공학부 디지털통신연구실) ;
  • 정재훈 (중앙대학교 전자전기공학부 디지털통신연구실) ;
  • 조용수 (중앙대학교 전자전기공학부 디지털통신연구실)
  • Published : 2010.02.28
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Abstract

The conventional detection methods developed for spatially-multiplexed MIMO systems such as OSIC and QRD-M show performance difference for each user depending on the order of detection when they are applied to detection of multi-user signals in uplink multiuser systems based on collaborative spatial multiplexing. In this paper, a signal detection method for uplink multiuser systems based on collaborative spatial multiplexing is proposed to provide similar performance for each user while its performance is close to the case of ML detection. Compared with QRD-M method, computational complexity of the proposed signal detection method is similar in the case of QPSK, and significantly lower in the case of high modulation order with 16-QAM and 64-QAM.

기존 SM MIMO 시스템을 위한 신호검출 기법인 OSIC 계열의 기법과 준최적 신호검출 기법인 QRD-M 기법을 협력적 공간다중화 기반 상향링크 다중사용자 시스템에 적용할 경우 사용자별 신호의 검출성능에 차이가 발생한다. 본 논문에서는 협력적 공간다중화 기반 상향링크 다중사용자 시스템을 위한 사용자간별 검출성능 차이가 발생하지 않으면서 최적 신호검출 기법과 유사한 성능을 보이는 신호검출 기법을 제안한다. 제안된 신호검출 기법의 연산복잡도는 QPSK 변조에서는 QRD-M과 유사하지만, 16-QAM, 64-QAM과 같이 높은 차수의 변조방식의 시스템에서는 QRD-M에 비해 매우 낮은 연산복잡도를 가진다.

Keywords

References

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