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

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

제로 포싱 (zero-forcing) 빔 형성과 반직교 기반 사용자 선정을 이용한 클러스터 (cluster) 기반 셀 협력 전송 방식의 성능에 대한 연구

On the Performance of Zero-Forcing Beamforming with Semi-orthogonal User Selection in Clustered Cell Coordinated Transmission

  • 양장훈 (연세대학교 전기전자공학과 이동통신 연구실) ;
  • 장승훈 (연세대학교 전기전자공학과 이동통신 연구실) ;
  • 김동구 (연세대학교 전기전자공학과 이동통신 연구실)
  • Yang, Jang-Hoon (Department of Electrical and Electronic Engineering of Yonsei University, Mobile Communication Lab) ;
  • Jang, Seung-Hun (Department of Electrical and Electronic Engineering of Yonsei University, Mobile Communication Lab) ;
  • Kim, Dong-Ku (Department of Electrical and Electronic Engineering of Yonsei University, Mobile Communication Lab)
  • 발행 : 2008.10.25
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초록

본 논문에서는 반직교 기반 사용자 선정과 제로 포싱(zero-forcing) 빔 형성에 기반한 간단하면서도 효율적인 세 셀 단위 셀 협력 전송 방법을 제안한다. 육각 셀룰라 시스템 모델에서 각 셀마다 두 그룹의 사용자를 갖는 와이너 (Wyner) 채널 모델에 대해서, 제안한 제로-포싱 협력 전송 방식의 합 전송율의 상계치는 송신 안테나 수와 사용자수의 이중 로거리듬(logarithm)에 비례함을 보인다. 모의 실험 결과는 제안된 협력 전송 방식의 효율성을 확증하며, 사용자 수에 따른 합 전송율은 상계치와 거의 같음을 확인할 수 있다.

In this paper, a simple and efficient three cell based clustered-cell coordination is proposed with well hewn zero-forcing beamforming (ZF-BF) with a semi-orthogonal user selection (SUS) as transmission and scheduling scheme. For a modified Wyner's channel model with two classes of user groups for a hexagonal cellular system, the upper bound of asymptotic sum rate scaling of ZF-BF in a proposed coordination is shown to be proportional to the number of transmit antennas and double logarithms of the number of users. The numerical results verify the efficiency of the proposed cell coordination. It is also numerically shown that ZF-BF with the SUS in CCCT actually achieves the upper bound of asymptotic sum rate sum rate scaling.

키워드

참고문헌

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