Performance analysis of hybrid RF-UWOC dual-hop link for satellite-underwater communication

In this paper, a radio frequency-underwater wireless optical communication (RF-UWOC) dual-hop decode-and forward (DF) relaying link for Satellite-Underwater communication is proposed to extend the communication distance based on RF and underwater optical wireless communication technology. The communication system consists of satellite, surface relay platform and underwater destination node, where the RF communication technology is adopted for satellite surface relay link, which is modeled as Rician fading distributions considering rain and snow attenuation. Surface relay platform and underwater destination node adopt underwater wireless optical communication (UWOC, and the link is modeled as Gamma-Gamma fading distributions considering sea water absorption and scattering. The closed-form mathematical expression of the RF link channel models and the UWOC link channel models is derived and analyzed, the outage probability (OP) and average bit error rate (ABER) performance of the satellite-underwater (RF-UWOC) dual-hop decode-and-forward (DF) relaying communication link is investigated and simulated.