Channel modeling for UWOC: a simulation approach

In this paper, the main aim is to study, simulate, and investigate a basic underwater optical wireless communication system in a direct line of sight (LoS) configuration. For this, we calculate total attenuation in ocean water, concerning depth-based chlorophyll concentration profile, in Scilab. The optical wavelength is 450 nm and depth varies from 0 to 250 m. Using these parameters, we found the optimum channel for all water types, comparing attenuation values at deep chlorophyll maximum (DCM). For the S9 chlorophyll profile, the DCM we found was 10 m, with attenuation at DCM as 7.391 m − 1 . Then a simple system was designed in Optisystem, with blue light-emitting diode (LED) as the transmitter, for non-return-to-zero on–off keying (NRZ-OOK) modulation. The system performance was analyzed by visualizing the eye diagram at 50 Mbps and 10 m channel length. This study also emphasizes the selection of a suitable frequency of light that can traverse the channel with minimum path loss and a compatible bit rate.