Downlink SINR Coverage and Rate Analysis with Dual Slope Pathloss Model in mmWave Networks

Due to the large available spectrum, millimeter wave (mmWave) technology is evolving as a promising candidate for next generation cellular communication systems. Recently, much attention has been focussed on the SINR coverage and rate analysis of mmWave networks. However, the existing coverage and rate performance analysis of mmWave networks available in literature consider single slope path loss model. In this paper, we analyze the downlink SINR coverage performance of mmWave networks with the critical distance dependent dual slope path loss model at the mmWave operating frequency of 28 GHz. Furthermore, we consider two different LOS probability functions (Blockage models) to incorporate blockages into path loss model, different base station (BS) densities and different transmit antenna beam pattern to analyze the performance of mmWave network. Our analysis shows that the downlink SINR coverage scales up under the dual slope path loss model as compared to the simplistic path loss model at low base station density (zeta). The spectral efficiency increases as BS density increases. Moreover, we find the higher limit on BS density that improves spectral efficiency. Also, our empirical results show the impact of different transmit antenna pattern and LOS probability functions on the SINR coverage and rate performance of mmWave network.