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

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)
Publication Information
Journal of the Institute of Electronics Engineers of Korea TC / v.45, no.10, 2008 , pp. 1-9 More about this Journal
Abstract
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.
Keywords
Zero-forcing; sum rate; cell coordination; MIMO;
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