Hardware and Interference Limited Cooperative CR-NOMA Networks Under Imperfect SIC and CSI

The conflation of cognitive radio (CR) and nonorthogonal multiple access (NOMA) concepts is a promising approach to fulfil the massive connectivity goals future networks given spectrum scarcity. Accordingly, this letter investigates outage performance imperfect cooperative CR-NOMA under hardware impairments interference. Our analysis involved with derivation end-to-end probability (OP) for secondary NOMA users by accounting channel state information (CSI), as well residual interference caused successive cancellation (SIC) errors coexisting primary/secondary users. numerical results validated Monte Carlo simulations show that network provides superior over orthogonal access. As imperfections become more significant, observed deliver relatively poor performance.