User Grouping for Massive MIMO Terrestrial Broadcasting Networks

In this paper, we study the design of user grouping and scheduling for massive multiple-input multiple-output (MIMO) broadcasting networks. To optimizing the system sum-rate we adaptively adjust the beamwidth and beam direction for each beam, i.e. each group by allocating the number of active elements of uniform circular array with central element to each beam. Then we consider a system model for multiple beamforming and an algorithm for user grouping based on adaptive beamwidth control. The performance of the proposed algorithm is demonstrated using numerical simulations.