Channel-Aware Power Allocation and Decoding Order in Overlay Cognitive NOMA Networks

To further improve spectral efficiency, this paper considers a non-orthogonal multiple access (NOMA)-assisted overlay cognitive radio network consisting of a pair of primary users and a pair of secondary users. In this network, communication between the pair of primary users is achieved with the help of the secondary transmitter (ST). In return, ST can communicate with the secondary receiver by se...