Time-Dispersion and Signal Attenuation Analysis of Underwater Optical Wireless Communication Links

摘要

Underwater optical wireless communication (UOWC) systems support high-speed, reliable and cost-effective implementations that are demanded for extending the telecommunication networks to oceans. UOWC systems suffer from attenuation and scattering processes. Particularly, the scattering process can change the direction of the emitted photons and, hence, quantifying the signal attenuation and the time-dispersion produced by absorption and scattering is a crucial work. Therefore, we propose new closed-form expressions for modeling the channel impulse response and the path loss in turbid waters that are validated through Monte Carlo simulations and can be used for system design and optimization purposes. Moreover, the developed expression is used to quantify the delay spread, which represents a very useful and accurate measure of the severity of inter-symbol interference (ISI).