Performance Study of Sea Surface Ultraviolet Communication Based on Circular Polarization Modulation

Ultraviolet (UV) communication is widely used for communication between vessels on the sea surface due to its high level of security. However, the communication performance is less than ideal due to the significant atmospheric turbulence and scattering effects over the sea surface. In this study, we effectively fit the parameters of sea surface atmospheric turbulence by adjusting the scale parameter of atmospheric turbulence and propose a high-computation-efficiency scattering model based on Monte Carlo simulation with partial uniform sampling (MCS-PUS) to simulate the atmospheric channel over the sea surface. Taking advantage of the characteristic that the polarization state of the laser in the atmospheric channel is less affected by surrounding factors, we demonstrate that the circular polarization modulation system can significantly improve communication performance and enhance the computation efficiency by a factor of 1.35×10<sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">5</sup> compared to the original algorithm. Finally, by comparing the bit error rate (BER) with the mainstream On-Off Keying (OOK) modulation method, we show that circular polarization modulation can effectively mitigate the impact of atmospheric turbulence and scattering effects on optical signals, reducing the system’s BER by one order of magnitude.