First there was light, now there is Visible Light Communication to expand our window on the world. Harald Haas, Professor of Mobile Communications at the University of Edinburgh, and his team specialise in finding innovative solutions to mobile communication challenges. Using the visible light spectrum of LED lights not only offers a more energy efficient source of light, it also offers a viable alternative to an overburdened radio bandwidth system.
‘There are many data hungry applications and the radio spectrum is limited,’ Haas explains the challenge. ‘The use of wireless mobile applications is growing and we are running out of radio spectrum to use. This was the problem in 2003, my colleagues and I began to study. We had a few ideas and weren’t sure if they would work but we worked on the release of radio frequencies spectrum to provide more wireless capabilities for the future. The visible light spectrum is 10,000 times larger than the radio frequencies spectrum so I wanted to uncover other possible technologies.’