Abstract
<p class="Abstract">For military divers, having a robust, secure, and undetectable wireless communication system available is a fundamental element. Wireless intercoms using acoustic waves are currently used. These systems, even if reliable, have the defect of being easily identifiable and detectable. Visible light can pass through sea water. Therefore, light can be used to develop short-range wireless communication systems. To realize secure close-range underwater wireless communication, the Underwater Optical Wireless Communication (UOWC) can be a valid alternative to acoustic wireless communication. UOWC is not a new idea, but the problem of the presence of sunlight and the possibility of using near-ultraviolet radiation (near-UV) has not been adequately addressed in the literature yet. In military applications, the possibility of using invisible optical radiation can be of great interest. In this paper, a feasibility study is carried out to demonstrate that UOWC can be performed using near-ultraviolet radiation. The proposed system can be useful for wireless voice communications between military divers as well as amateur divers.</p>
Highlights
The use of wireless communications is very common in a wide range of terrestrial devices
A feasibility study is carried out to demonstrate that Underwater Optical Wireless Communication (UOWC) can be performed using near-ultraviolet radiation
Many studies are present in the literature, underwater optical communication via near-ultraviolet (UV-A) radiation is not addressed
Summary
The use of wireless communications is very common in a wide range of terrestrial devices. During communications between the military divers it would be useful to use light not visible from normal video surveillance systems. The system must be simple, robust, consuming few energy and not affected by ambient light, and, above all, difficult to detect and/or intercept by video surveillance systems sensitive to visible radiation. To obtain these performances it is necessary to avoid the use of blue-green radiation, present in the solar radiation that penetrates into the water. If we are only interested to speech transmission, a bandwidth of 32 kbps is generally acceptable With this type of communication, it is possible to create simple, small, light, robust and energy efficient systems
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