Outage Analysis for Correlated Sources Coding over NOMA in Shadowed κ-μ Fading

We consider correlated sources coding over a up-link non-orthogonal multiple access shadowed kappa-mu fading channel. The sufficient condition for lossless coding is determined by the intersection of the Slepian-Wolf region and multiple access channel region, assuming source-channel separation holds. The exact expression for the outage probability upper bound is derived by dividing the sufficient conditions into three cases. The accuracy of the analytical results is verified by the Monte-Carlo simulations. The analytical results indicate that more than 2nd order diversity gain can be achieved with a larger ratio of line-of-sight dominant component in single cluster or multiple clusters with non-line-of-sight component. It is also found that the shadowed kappa-mu fading well represents one-sided Gaussian, Rayleigh, Rician, and Nakagami-m fading in calculating the outage probability. Furthermore, the epsilon-outage achievable rate is analyzed, which is found to be larger with higher source correlation and/or average signal-to-noise ratio.