Outage analysis of cognitive inspired NOMA networks in the presence of imperfect SIC, CCI, and non-ID fading channels

This paper analyzes the outage performance of cognitive-inspired non-orthogonal multiple access (NOMA) network under imperfect successive interference cancellation (SIC), co-channel interference (CCI), and non-identical distributed fading channels. Firstly, we aim to derive the cumulative distribution function (CDF) for the optimum channel with beamforming design, the selected channel maximization, and the selected channel minimization and the probability density function (PDF) for channel interference in order to facilitate the outage performance analysis. Secondly, we obtain the closed-form expressions of outage probability for the primary and secondary destinations according to two strategies: (1) the primary destination is near secondary transmitter and (2) the primary destination is far from secondary transmitter. Thirdly, to provide some useful insights into system designs, we carry out the asymptotic analysis for the three power setting scenarios. Finally, we validate the derived theoretical analyses using Monte-Carlo method.