Full-Duplex radio for uplink/downlink transmission with spatial randomness

Abstract

We consider a wireless system with a full-duplex (FD) access point (AP) that\ntransmits to a scheduled user in the downlink (DL) channel, while receiving\ndata from an user in the uplink (UL) channel at the same time on the same\nfrequency. In this system, loopback interference (LI) at the AP and inter user\ninterference between the uplink (UL) user and downlink (DL) user can cause\nperformance degradation. In order to characterize the effects of LI and inter\nuser interference, we derive closed-form expressions for the outage probability\nand achievable sum rate of the system. In addition an asymptotic analysis that\nreveals insights into the system behavior and performance degradation is\npresented. Our results indicate that under certain conditions, FD transmissions\nyield performance gains over half-duplex (HD) mode of operation.\n