Performance analysis of small cell networks with multi-antenna base stations utilizing interference mitigation techniques

In this paper, we analyze the performance of a dense small cell network with multi-antenna Base Station (BS)s employing spatial Poisson Point Process (PPP) model. In this model, the BSs and User Equipment (UE)s are distributed as two independent PPPs which are well appropriate for upcoming small cells in the next generation of wireless systems. We consider the scenario in which the small cell BSs utilize the Frequency Reuse (FR) technique to mitigate the other BS interferences, and we derive the analytical expressions for the network performance metrics, the coverage probability, the network throughput and the energy efficiency. Then we investigate the effect of the BS density, the number of BS antennas and frequency bands on the metrics. Our analytical and simulation results represent the benefit of increasing the number of frequency bands on all three metrics. In addition, we observe that the coverage probability and the network throughput are increasing functions of both the BS density and the number of BS antennas; while the energy efficiency does not follow the same attitude.