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Successive Interference Cancellation Based Non-Orthogonal Opportunistic Beamforming

Opportunistic beamforming has always been attracting plenty of attentions due to its capability of inducing large channel fluctuations and providing high multiuser diversity gain. However, in most of the existing opportunistic beamforming schemes, only one user is scheduled for data transmission at each time slot. To serve more users simultaneously, in this paper, a novel non-orthogonal scheduling algorithm is proposed from the perspectives of perfect successive interference cancellation (SIC) and system rate maximization. Simulation results validate that the proposed scheme achieves an obvious performance gain over two conventional baseline schemes.