Performance Analysis for Dual-Hop UWOC-RF Systems with NOMA

• Published in: IEEE internet of things journal Vol. 10; no. 15; p. 1
• Main Authors: Zhang, Jiliang, Feng, Lihong, Yuan, Zi, Liu, Huanting, Pan, Gaofeng
• Format: Journal Article
• Language: English
• Published: Piscataway IEEE 01.08.2023; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: average achievable rate; Bivariate analysis; Fading channels; NOMA; Nonorthogonal multiple access; Optical communication; outage probability; Protocols; Radio frequency; Signal to noise ratio; System performance; Underwater communication; Underwater wireless communications; Wireless communication; Wireless communications
• ISSN: 2327-4662; 2327-4662
• DOI: 10.1109/JIOT.2023.3262636

In this study, we investigate a non-orthogonal multiple access (NOMA)-assisted dual-hop underwater wireless optical communication-radio frequency (UWOC-RF) network. Specifically, an optical source forwards a NOMA signal to a marine relay, which first deploys either the heterodyne detection or intensity modulation direct detection to process the received signal, and then encodes and re-transmits a superimposed signal to two terrestrial destinations. Assuming the UWOC channel is subject to a unified mixture Exponential-Generalized Gamma distribution and the RF channels experience Nakagami-m fading, the analytical as well as asymptotic expression for outage probability is obtained in the form of the Meijer's G-function. Moreover, the average achievable rate is also investigated by utilizing the bivariate Fox's H-function. In addition, the accuracy of those expressions is verified with Monte-Carlo simulations.