한국전자파학회논문지 (The Journal of Korean Institute of Electromagnetic Engineering and Science)

  • 제15권9호
  • /
  • Pages.863-871
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  • 2004
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  • 1226-3133(pISSN)
  • /
  • 2288-226X(eISSN)
한국전자파학회 (The Korean Institute of Electromagnetic Engineering and Science)
권호 표지

DS/CDMA DMB 하향 링크에서 복잡도가 감소된 블라인드 부분 공간 채널 추정

Complexity Reduced Blind Subspace Channel Estimation for DS/CDMA DMB Downlink

  • 양완철 (한국항공대학교 전자ㆍ정보통신ㆍ컴퓨터공학부) ;
  • 이병섭 (한국항공대학교 전자ㆍ정보통신ㆍ컴퓨터공학부)
  • 발행 : 2004.09.01
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초록

본 논문에서는 정합 필터 출력을 이용하여 연산 복잡도가 감소된 DS/CDMA DMB 하향 링크 시스템에서의 부분 공간 채널 추정 기법을 제안한다. 연산 복잡도 감소 효과는 채널 벡터의 길이가 짧고 시스템의 부하가 적절할 때 매우 크게 나타난다. 이전에 제안된 부분 공간 채널 추정 알고리즘은 화산 이득이 큰 시스템에서 막대한 연산 복잡도 문제를 겪게 된다. 제안된 알고리즘에 약간의 성능 손실이 발생하지만 데이터 행렬의 길이가 길어지게 되면 그 영향은 미미해진다. 시뮬레이션과 분석적인 MSE 성능의 유도를 통해 성능을 평가한다.

In this paper, we propose a subspace channel estimation technique for DS/CDMA DMB down link system, which can obtain reduction in numerical complexity by using of matched filtering outputs. The complexity reduction is considerable when the channel length is small and the system is moderately loaded. Previously proposed subspace-based blind channel estimation algorithm suffer from high numerical complexity for systems with large spreading gains. Although the proposed algerian suffers a slight performance loss, it becomes negligible for large observation length. Performance is evaluated through simulations and the derivation of the analytical MSE.

키워드

참고문헌

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