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

대한전자공학회 (The Institute of Electronics and Information Engineers)
권호 표지

Rate-2인 $2{\times}2$ 시공간 부호를 위한 효율적인 복호 알고리즘

Efficient Decoding Algorithm for Rate-2, $2{\times}2$ Space-Time Codes

  • 김정창 (포항공과대학교 전자컴퓨터공학부) ;
  • 전경훈 (포항공과대학교 전자컴퓨터공학부)
  • 발행 : 2009.03.25
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⟨ 이전 논문 다음 논문 ⟩

초록

최근에 간단한 ML 복호가 가능한 rate-2, $2{\times}2$ 시공간 부호가 개발되었다. 비록 이러한 간단한 ML 복호 알고리즘이 ML 복호 복잡도를 줄여 주지만 여전히 향상될 여지가 남아 있다. 본 논문에서는 간섭제거 방법을 사용하여 ML 복호와 거의 동일한 성능을 가지면서 rate-2, $2{\times}2$ 시공간 부호를 위한 효율적인 복호 알고리즘을 제안한다. 제안된 알고리즘의 복호 복잡도는 기존의 간단한 ML 복호에 비해서도 더욱 감소하며 변조 차수가 클수록 복호 복잡도 감소율은 더욱 증가한다.

Recently, a rate-2, $2{\times}2$ space-time code with simple ML decoding has been designed. Though the simple ML decoding algorithm does reduce the ML decoding complexity, there is still need for improvement. In this paper, we propose an efficient decoding algorithm for the rate-2, $2{\times}2$ space-time code using interference cancellation techniques with performance virtually identical to that of ML decoding. Also, the decoding complexity of the proposed algorithm is significantly reduced compared to the conventional simple ML decoding, especially for large modulation orders.

키워드

참고문헌

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