Non-Orthogonal Multiple Access for Hybrid VLC-RF Networks With Imperfect Channel State Information

This paper proposes a general framework for the energy efficiency analysis of hybrid visible light communication (VLC) and Radio Frequency (RF) wireless system, in which both VLC RF subsystems utilize non-orthogonal multiple access (NOMA) technology. The proposed is based on realistic scenarios as it takes into account mobility users assumes imperfect channel-state information (CSI). In this context, tractable closed-form expressions are derived corresponding average sum-rate NOMA-VLC orthogonal frequency division (OFDMA)-VLC. It shown extensively that incurred CSI errors have considerable impact OFDMA-VLC systems. Hence, they should be taken detailed design practical We further demonstrate NOMA-VLC-RF system outperforms under CSI. Respective computer simulations corroborate analytic results, interesting theoretical insights provided, will useful effective deployment conventional VLC-RF