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

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

고속 대각 하중 행렬을 이용한 MIMO LTE 프리코딩 코드북

A MIMO LTE Precoding Codebook Based on Fast Diagonal Weighted Matrices

  • 박주용 (신경대학교 인터넷정보통신학과) ;
  • 펭부쉬 (전북대학교 정보통신공학과) ;
  • 이문호 (전북대학교 정보통신공학과)
  • 투고 : 2011.10.26
  • 심사 : 2012.03.19
  • 발행 : 2012.03.25
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초록

본 논문에서는 직교 구조를 갖는 고속 대각 하중 재킷 행렬(DWJM:diagonal-weighted Jacket matrices)을 제안 한다. 고속 알리즘을 이용해 높은 차수의 DWJM을 낮은 차수의 희소 행렬로 분해를 통해 연속적인 DWJM의 계산 수를 줄인다. 원소연산 역행렬 특성을 가진 대각 하중 프레임워크(framework)의 결과로, 제안되는 DWJM은 프리코딩(precoding) MIMO(Multiple Input and Multiple Output) 무선통신에 적용된다. DWJM의 성질에 기반하여, DWJM은 대체 오픈 루프 순환 지연 다이버시티 (CDD : Cyclic Delay Diversity) 프리코딩으로 사용될 수 있으며, 이는 셀룰러(cellular) 통신 시스템에 이용될 수 있다. 이와 같은, DWJM에 기반한 프리코딩 시스템의 성능에 대해 OSTBC (Orthogonal Space-Time Block Code) MIMO LTE 시스템과 비교 한다.

In this paper, a fast diagonal-weighted Jacket matrices (DWJMs) is proposed to have the orthogonal architecture. We develop the successive DWJM to reduce the computational load while factorizing the large-order DWJMs into the low-order sparse matrices with the fast algorithms. The proposed DWJM is then applied to the precoding multiple-input and multiple output (MIMO) wireless communications because of its diagonal-weighted framework with element-wise inverse characteristics. Based on the properties of the DWJM, the DWJM can be used as alternative open loop cyclic delay diversity (CDD) precoding, which has recently become part of the cellular communications systems. Performance of the DWJM-based precoding system is verified for orthogonal space-time block code (OSTBC) MIMO LTE systems.

키워드

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