Zero-forcing beamforming user grouping algorithms in massive MIMO systems

In this paper an analysis of different User Grouping algorithms with Zero-Forcing Beamforming technique for IoT oriented massive MIMO systems is presented. The capacity-based algorithms with both non-overlapping and overlapping user grouping are observed. The algorithm working principles are outlined and the complexity of each of the algorithm is evaluated. Additionally, a comparative performance analysis is performed. The results show that a better performance of the massive MIMO system is achieved with the algorithms based on overlapping user grouping approach compared to the algorithms based on non-overlapping user grouping approach.