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On Opportunistic Beamforming with Multiple-User Selection  

Ku, Mi-Hyeon (한양대학교 전자전기제어계측공학과 이동통신망연구실)
Kim, Dong-Woo (한양대학교 전자컴퓨터공학부)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.33, no.2A, 2008 , pp. 130-138 More about this Journal
Abstract
In this paper, we propose a user selection method to maximize the sum-rate of downlink over opportunistic beamforming. The throughput of an opportunistic beamforming with non-uniformly distributed or a small number of users can decrease. In order to improve the throughput, we propose a scheduling method that does not use SINR or SNR but uses the effective channel gain of each user obtained from the SINR or SNR feedback. The proposed method makes it possible to select users flexibly according to the distribution of users. In numerical results, we show that the proposed methods improve the average sum-rate about 60% when users are distributed non uniformly.
Keywords
Opportunistic beamforming; Dumb antenna; User selection;
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