Outage Probability of Wireless-powered Multi-antenna Cooperative Spectrum Sharing Networks with Full-duplex and NOMA Transmissions

摘要

We consider a cooperative spectrum sharing non-orthogonal multiple access (NOMA) network in which a wirelessly powered secondary transmitter assists transmission from a primary transmitter to a primary receiver with poor channel conditions, and simultaneously the secondary transmitter transmits to a secondary receiver with strong channel conditions. The secondary transmitter is assumed to be full-duplex enabled and is equipped with multiple antennas. In order to cancel the self-interference at the secondary transmitter two zero-forcing (ZF) based beamforming schemes and a maximum ratio combining/maximum ratio transmission scheme are designed and the corresponding outage probability analysis of the primary and secondary networks, are derived. Our results suggest that by using ZF-based beamforming schemes depending on the number of transmit/receive antennas at the full-duplex secondary transmitter significant performance improvement can be achieved. Moreover, our results indicate that proposed ZF-based schemes achieves a zero-diversity order.