Abstract

In this paper we derive the outage probability and average spectral efficiency of downlink users in a mixed cell full duplex (FD)-half duplex (HD) non orthogonal multiple access (NOMA) system in the presence of inter-cell interference. Despite increase in rate achieved in a complete full duplex system as the available bandwidth increases, there is an increase in outage probability due to the additional interference from uplink users. Instead, a mixed cell system with half duplex and full duplex base stations can be used along with NOMA. Though there is a decrease in rate achieved when compared to a complete FDNOMA system, outage probability also reduces. This trade-off gives the designers flexibility to choose the fraction of full duplex base stations to deploy, choose the ratio of power split in NOMA to achieve a target rate at a given outage.

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