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

대한전자공학회 (The Institute of Electronics and Information Engineers)
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다중 송수신 안테나 시스템에서 적응 K-best 검출 알고리즘

An Adaptive K-best detection algorithm for MIMO systems

  • 김종욱 (연세대학교 전기전자공학과) ;
  • 강지원 (연세대학교 전기전자공학과) ;
  • 이충용 (연세대학교 전기전자공학과)
  • 발행 : 2006.10.25
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초록

다중 송수신 안테나 시스템에서 비트 오류 확률 성능면에서 최적의 기법으로 알려진 ML(Maximum-Likelihood) 복호기를 구현하기 위해 격자 복호 기법이 제안되었다. 그러한 격자 복호 기법에 기반한 복호기에는 구 복호기, K-best 복호기 등이 있으며, K-best 검출 기법은 격자 복호 기법의 실제 구현에 가장 적합하지만 오차 전달 현상에 의한 성능 저하라는 단점이 있다. 본 논문에서는 이러한 K-best 검출 기법의 단점을 보완해 비트 오류 확률 성능을 개선하고 평균 연산량을 낮춘 적응 K-best 기법을 제안하였다.

Lattice decoding concept has been proposed for the implementation of the Maximum-Likelihood detection which is the optimal receiver from the viewpoint of the BER (Bit Error Rate) performance for MIMO (Multiple Input Multiple Output) systems. Sphere decoding algorithm and K-best decoding algorithm are based on the lattice decoding concept. A K-best decoding algorithm shows a good BER performance with relatively low complexity. However, with small K value, the error propagation effect severely degrades the performance. In this paper, we propose an adaptive K-best decoding algorithm which has lower average complexity and better BER performance than conventional K-best decoding algorithm.

키워드

참고문헌

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