Digital Audio Transmission with Modulated Visible Light

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Fehér Gábor
Department of Broadband Infocommunications and Electromagnetic Theory

Nowadays, with the spread of mobile devices and the continuous technological advancements, there is a growing demand for development of new wireless communication methods with high speed, great accessibility and good reliability. In addition, the level of integration in electronic devices noticeably increases, which leads to multi-functionalization. The most obvious example of this is the advancement of smartphones in the past few years.

Taking account of the facts mentioned above, it seems logical to consider visible light as a media of wireless communication. Firstly, the visible part of the electromagnetic spectrum is mostly unexploited when it comes to wireless communication, moreover, in some areas using visible light can be more advantageous than classic methods. Secondly, the biggest part of the infrastructure needed for this technology is actually estabilished, because at most places the current illuminating systems need only small modifications to be able to function as a visible light communication link.

In this work I will examine one possible application of visible light communication. During the problem’s solution I implemented a system that transmits and plays high-quality digital audio in real-time, which helped analyzing the efficiency and the boundaries of the applied technology.


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