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Outage probability analysis of vertical underwater wireless optical links under varying turbulence with pointing
Abstract:
In this paper, we investigate the outage probability performance of underwater wireless optical communication for a vertical link. Due to temperature and salinity variations, turbulence in the vertical link ranges from strong to weak. The vertical link turbulence is modeled using a cascade of the gamma-gamma and hyperbolic tangent log-normal distributions. In addition to turbulence, we consider the impact of attenuation losses in the underwater medium and pointing errors at the receiver for outage probability analysis. A closed-form expression for the outage probability of the vertical link is derived. Outage probability results are presented for different water types, signal-to-noise ratio thresholds, degrees of pointing errors, and data rates. Additionally, an asymptotic analysis is provided to offer insights at high transmitted power. The accuracy of the derived closed-form expression is validated using Monte Carlo simulations.
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