In this paper, we investigate the performance for a mixed dual-hop free space optical-underwater wireless optical communication (FSO-UWOC) system, in which a source transmits information to a destination through a multi-aperture relay. In addition, a selection combining and a transmitting aperture select- ion protocols are adopted at the relay to process the received and transmitted signals. Considering two different types of detection techniques, and a decode-and-forward scheme, the analytical expressions for the average bit error rate are derived based on the Meijer's G-function and Fox's H-function for the considered system over Gamma-Gamma and mixture Exponential-Generalized Gamma fading channels. In addition, the accuracy of the derived analytical expressions is verified with Monte-Carlo simulation results.
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Li et al. (2024) studied this question.
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