Journal of the Institute of Electronics Engineers of Korea TC (대한전자공학회논문지TC)

The Institute of Electronics and Information Engineers (대한전자공학회)
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A New Subspace Search-based Method for MIMO Systems

MIMO 시스템에서 부분 검색 공간 기반의 검파기법

  • Nam, Sang-Ho (Dept. of Electrical and Electronic Engin., Yonsei University) ;
  • Ko, Kyun-Byoung (Control and Instrumentation Engineering at Chungju National University) ;
  • Hong, Dae-Sik (Dept. of Electrical and Electronic Engin., Yonsei University)
  • 남상호 (연세대학교 전기전자공학과) ;
  • 고균병 (충주대학교 제어계측공학과) ;
  • 홍대식 (연세대학교 전기전자공학과)
  • Received : 2011.03.21
  • Accepted : 2011.05.17
  • Published : 2011.05.25
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Abstract

In this paper, we propose a subspace search-based detector (SSD) with low-complexity to achieve near optimal performance for multiple-input multiple-output systems. As an effective solution to reduce the prohibitive computational complexity of the optimal maximum likelihood detector, a partial candidate symbol vector is generated through a partitioned search space but not the entire search space. In addition, based on a partial candidate symbol vector, an ensemble candidate symbol vector generation considering the whole search space is introduced to produce a near optimal solution. As a result, the proposed SSD achieves near-maximum-likelihood performance while having a significantly reduced computational complexity.

본 논문에서는 MIMO 시스템에서 최적의 수신 성능을 제공하면서 낮은 복잡도를 요구하는 부분 검색 공간 기반의 검파 기법이 제안된다. 최적의 최대 우도 검파기는 신호의 전체 검색 공간을 활용하기 때문에 많은 복잡도를 요구하게 되는 데, 이에 대한 해결 방안으로 신호의 부분 검색 공간에 기반한 부분 후보 심볼 벡터 생성 기법이 제안된다. 또한, 최적의 수신 성능을 제공하기 위해서 전체 검색 공간에 기반한 전체 후보 심볼 벡터 생성 기법이 제안된다. 결론적으로 제안하는 부분 검색 공간 기반의 검파 기법은 MIMO 시스템에서 낮은 복잡도를 필요하면서 최적의 수신 성능을 제공하는 검파기법으로 사용될 수 있다.

Keywords

References

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