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

한국통신학회 (The Korean Institute of Commucations and Information Sciences)
권호 표지

다중 채널 순서화 기술 기반 효율적인 Soft-Output MIMO 신호검출 기법과 VLSI 구현

An Efficient Soft-Output MIMO Signal Detection Method Based on Multiple Channel Ordering Technique and Its VLSI Implementation

  • 임태호 (중앙대학교 전자전기공학부 디지털통신연구실) ;
  • 유성욱 (중앙대학교 전자전기공학부 디지털통신연구실) ;
  • 김재권 (연세대학교 원주캠퍼스 디지털통신연구실) ;
  • 조용수 (중앙대학교 전자전기공학부 디지털통신연구실)
  • 투고 : 2010.06.06
  • 심사 : 2010.11.22
  • 발행 : 2010.12.31
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초록

본 논문에서는 공간다중화 multiple input multiple output (MIMO) 시스템을 위한 효율적인 soft-output 신호검출 기법을 제안한다. 제안된 기법은 ordered successive interference cancellation (OSIC) 알고리즘을 기반으로 하지만, 오류 전파 문제를 크게 줄임으로써 기존 OSIC 알고리즘에 비해 큰 성능 향상을 보인다. 제안된 기법은 다중 순서화 기술을 이용한 enhanced OSIC (ESIC) 알고리즘을 결합한 기법으로 신뢰도 높은 log likelihood ratio(LLR) 값을 매우 적은 후보 심볼 벡터를 이용하여 생성할 수 있다. 본 논문에서는 $4{\times}4$ 16-QAM MIMO 시스템을 위한 OSIC, K-Best 가법과 제안된 신호검출 기법을 $0.13{\mu}m$ CMOS 기술 환경에서 구현하였으며, 모의 시험과 구현 결과를 통해 제안된 신호검출 기법이 성능과 하드웨어 구현 측면에서 매우 효율적임을 확인하였다.

In this paper, we propose an efficient soft-output signal detection method for spatially multiplexed multiple input multiple output (MIMO) systems. The proposed method is based on the ordered successive interference cancellation (OSIC) algorithm, but it significantly improves the performance of the original OSIC algorithm by solving the error propagation problem. The proposed method combines this enhanced OSIC (ESIC) algorithm with a multiple ordering technique in a very efficient way. As a result, the log likelihood ratio (LLR) values can be computed by using a very small set of candidate symbol vectors. The proposed method has been implemented with a $0.13{\mu}m$ CMOS technology for a $4{\times}4$ 16-QAM MIMO system. The simulation and implementation results show that the proposed detector provides a very good solution in terms of performance and hardware complexity.

키워드

참고문헌

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