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Keywords = underwater visible light communication (UWVLC)

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13 pages, 3597 KiB  
Communication
On Performance Analysis of Cooperative Horizontal and Vertical Underwater VLC Systems with Best Relay Selection
by Rachna Sharma, Yogesh N. Trivedi, Kamal K. Garg, Vimal Bhatia and Mohammed Abdel-Hafez
Photonics 2023, 10(4), 429; https://doi.org/10.3390/photonics10040429 - 11 Apr 2023
Cited by 6 | Viewed by 2059
Abstract
In this paper, we consider cooperative horizontal and vertical underwater visible light communication (UWVLC) systems employing best relay selection. In the vertical UWVLC system, the source is placed at the sea surface and the destination is placed at a depth of 60 m. [...] Read more.
In this paper, we consider cooperative horizontal and vertical underwater visible light communication (UWVLC) systems employing best relay selection. In the vertical UWVLC system, the source is placed at the sea surface and the destination is placed at a depth of 60 m. The link between the source and the destination is modeled as concatenated layers considering inhomogeneous environmental conditions. The underwater parameters change with depth, causing a variable refractive index, which leads to non-uniform optical turbulence. The horizontal communication link is analyzed for two different levels of turbulence at 10 m and 50 m depths. Turbulence is modeled using a log-normal distribution, whose statistical parameters depend on the temperature and salinity at different depths. We have also taken into account the path losses caused by absorption and scattering, and carried out a comprehensive performance comparison between the horizontal and the vertical UWVLC systems. Insights show that compared to horizontal links, vertical links need an extra relay in order to achieve the same level of matching performance. Moreover, it is shown that the horizontal system’s outage performance improves with depth. Full article
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