Outage Analysis of Underlaid Multi-Antenna D2D Communication in Cellular Networks

In this work, we consider in-band device-to-device (D2D) communication underlaid with an uplink cellular network, where D2D users are equipped with multiple antennas. We assume that the D2D users employ the distance cut-off mode selection scheme to reduce the interference to base stations. With the help of stochastic geometry, we derive the approximate yet accurate analytical outage probability experienced at the base station and the D2D receiver. The accuracy of the derived analytical results is confirmed by simulation results. Our numerical results show that having multi-antenna D2D users can improve the outage probability at the D2D receiver, while the outage probability at the base station is not impacted. In addition, equal number of D2D transmit and receive antennas can provide better D2D receiver outage performance. The results also show that a smaller value of the distance cut-off threshold is a good choice as it achieves good D2D communication and does not adversely impact the cellular network performance.