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A NOMA user pairing scheme jointed with relay selection is proposed considering the influence of relay selection on NOMA user pairing.The stepwise power optimization scheme based on the sum rate was designed and the solutions are obtained by the particle swarm algorithm.The effectiveness of the proposed scheme is verified by our simulation experiment, the relay-aided NOMA-UOWC system with the SOPA scheme performs better robustness to the underwater turbulence compared with FPA and DUA schemes.The influence of solar radiation noise on the NOMA-UOWC system under different water qualities was studied, the simulation results indicate that as the attenuation of seawater decreases, the impact of solar radiation noise on the UOWC system increases.
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IEEE/ICACT20220386 Slide.18
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