Cooperative NOMA with Hybrid PTS-Based Energy Harvesting Relay

Abstract

This chapter investigates the performance of a cooperative non-orthogonal multiple access (NOMA) scheme aided by an energy harvesting (EH) relay. This technique uses hybrid power time switching (PTS) and time switching relaying (TSR) protocol to harvest energy at a near user, which acts as a decode and forward (DF) relay to forward the signal of far user. Far user performs maximal ratio combining (MRC) technique after receiving two copies of signal through direct link from the source and relayed link via near user. We derive the outage probability (OP) of near user, far user, and overall system in closed form for both hybrid PTS and TSR scheme. The impact of NOMA coefficients and different parameters like target data rates of both the users, time switching factor, power splitting factor is investigated in this chapter. Further, throughput of the cooperative NOMA scheme is also shown.