: In this paper, we analyze a combined terrestrial-underwater optical communication link for
providing high-speed optical connectivity between onshore and submerge systems. For this purpose,
different transmission signaling schemes were employed to obtain performance results in terms of
average bit error rate (ABER). In this sense, from the starting point of a known conditional bit-errorrate (CBER) in the absence of turbulence, the behavior of the entire system is obtained by applying
an amplify-and-forward (AF) based dual-hop system: The first link is a terrestrial free-space optical
(FSO) system assuming a Málaga distributed turbulence and, the second one, is an underwater FSO
system with a Weibull channel model. To obtain performance results, a semi-analytical simulation
procedure is applied, using a hyper-exponential fitting technique previously proposed by the authors
and leading to BER closed-form expressions and high-accuracy numerical results.
