This article proposes a novel non-orthogonal multiple access (NOMA) assisted cooperative spectrum-sharing network, in which one of the full-duplex (FD) secondary transmitters (STs) is chosen among many for forwarding primary transmitter's and its own information to receiver receivers, respectively, using NOMA technique. To stimulate ST conduct transmission sustain operations, simultaneous wirel...

This paper investigates the relay selection problem and proposes a three-stage strategy with power allocation (TRSPA) for spectrum-sensing-based full-duplex (FD) user relaying cooperative non-orthogonal multiple access (CNOMA) scheme. Uniformly-distributed strong relays in investigated scheme help weak communicates base station an efficient reliable way. The proposed TRSPA maximizes transmissio...