A study and simulation of vertical underwater wireless optical communication for video transmission application

Abstract

In recent years, the requirement of high-quality video signal transmission for Industrial Internet of Things (IIoT) has raised exponentially for monitoring and manufacturing process automation. In mid sea oil rigs, oil exploration autonomous systems are commonly employed by necessitating high-quality video transmission via Underwater Wireless Optical Communication (UWOC). The UWOC system has gained significant interest in the view of increased data rate, high accuracy, higher bandwidth, and providing highly secured transmission. The underwater wireless data transmission process has gained significant attention among armed, industrial, and research communications, as it acts as an essential part of tactical surveillance, pollution control, oil control and maintenance, offshore exploration, weather observation, and oceanography research. For facilitating these actions, a number of unmanned vehicles are deployed underwater and it transmits high-resolution videos. Generally, light propagation in underwater medium is disturbed due to some degrading effects such as turbulence, scattering, and absorption which will degrade the performance. At the same time, the underwater optical links are affected due to various water types, distinctive water profundities, various seasons, diverse weakening attributes the signal transmitted may endure different issue like absorption, scattering, reduced SNR, expanded BER, link misalignment issues, which will prompt low quality video. Therefore, there is a need to examine the UWOC link characteristics such as BER, link mis alignment, video quality, pertaining to video transmission for various modulation techniques. At the same time, channel estimation is essential for adapting with proper correction techniques that compensate for the errors due to those effects. Also, the large number of high-resolution videos captured underwater necessitates effective image compression technique. In this view, this research work focuses on the study of different UWOC in mid sea oil rigs and underwater