wireless-powered cooperative spectrum sharing networks with full-duplex and noma transmissions

We consider a non-orthogonal multiple access (noma) cooperative spectrum sharing network, where a multi-antenna secondary transmitter assists transmission of a primary transmitter-receiver pair, and at the same time transmits to a secondary receiver. the secondary transmitter is assumed to be full-duplex and energy-constrained. therefore, secondary transmitter replenishes its battery storage via energy harvesting from an energy access point located in its vicinity. in order to cancel the self-interference at the secondary transmitter, two zero-forcing (zf)-based beamforming schemes and one maximum ratio combining/maximum ratio transmission (mrc/mrt) scheme are designed. then, corresponding outage probability analysis of the primary and secondary networks with proposed beamforming schemes are derived. outage probability results are used to study the delay-constrained throughput of the system. our results suggest that by utilizing zf-based beamforming schemes, significant performance improvement can be achieved compared to the half-duplex counterpart. moreover, our results indicate that proposed zf-based schemes achieves a zero-diversity order.