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

The Korean Institute of Electromagnetic Engineering and Science (한국전자파학회)
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Performance Analysis of A Hybrid Codebook for LTE Downlink Relay Systems

LTE 하향 링크 중계기 시스템에서 새로운 하이브리드 코드북 성능 분석

  • Kim, Hyung-Jun (School of Information & Communication Engineering, Chungbuk National University) ;
  • Park, Noe-Yoon (School of Information & Communication Engineering, Chungbuk National University) ;
  • Kim, Young-Ju (College of Electrical & Computer Engineering, Chungbuk National University)
  • 김형준 (충북대학교 정보통신공학과) ;
  • 박노윤 (충북대학교 정보통신공학과) ;
  • 김영주 (충북대학교 전자정보대학)
  • Accepted : 2011.04.05
  • Published : 2011.04.30
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Abstract

In this paper, we propose a novel hybrid codebook design method which combines DFT matrix based codebook for Rayleigh fading and LOS codebook for direct path. Link-level performances employing hybrid codebook outperform the ones employing the conventional codebooks when K-factor of Rician distribution is 0.28 to 0.99. Moreover hybrid codebook shows good performances over not only Rayleigh channel but also high K's Rician channels.

본 논문에서는 레일리 분포를 가지는 DFT 행렬 기반의 코드북에 LOS용 코드북을 라이시안 페이딩 채널에서 최소 거리를 최대화하는 조건에 맞게 결합, 새로운 하이브리드 코드북 설계 방법을 제안한다. 제안하는 코드북을 LTE 하향 링크 시스템에 적용, 기존의 DFT 행렬을 이용한 코드북과 제안하는 하이브리드 코드북의 성능을 분석한다. 하이브리드 코드북은 K값이 0.28~0.99인 경우, 가장 우수한 성능을 보이면서 레일리 페이딩 채널 및 LOS 성분이 강해지는 모든 경우에서 우수한 성능을 보인다.

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