Fair-CDUS for Equalization of User Selection Frequency in Massive Multi-User MIMO System

Multi-user technique is a method which allows a transmitter serves multiple users in the same time. In the Massive-MIMO, Multi-user technique could be implemented with the help of beamforming technique which allows the system to create several beams in the same time, where every beam serves a different user. In this paper, we introduce a method called Fair-Chordal Distance User Selection (Fair-CDUS) to equalize the user selection in Massive-MIMO System. The fairness level which is measured in this research is the frequency of user selection. In this paper, we also explain how to adjust the degree of the fairness with our proposed method.