The rise in demand for internet connectivity, combined with over-subscribed radio frequency (RF) electromagnetic spectrum, has led researchers to explore alternative technologies to support data transmission. One candidate, visible light communications (VLC), takes advantage of the visible light spectrum, which is 4,000 times larger than its RF counterpart, requires no operation license, and has a high re-use frequency - thus it is consequently a fast-emerging technology in the field of data transmission.

This book offers an overview of the state-of-the-art of visible light communication systems across emerging areas of increasing importance within the field. It is divided into two parts, with the first describing the latest developments in data communication using VLC technologies. It includes the fundamental mechanics of the semiconductor light-emitting diodes (LEDs) used in academic and commercial systems, areas of high-speed circuit design including circuit diagrams and small-signal analysis. Exotic modulation formats and digital signal processing including machine learning architectures are then covered before the book looks at emerging areas within the VLC research community, including colour balancing and colour-based modulation. The second part of the book looks at applications that do not consider indoor data communication in general, such as localisation/positioning, sensing and the intelligent transport systems paradigm. Finally, the completely new area of oxygen sensing is also included with the aim of inspiring researchers to test news fields and apply ideas across domains.

Visible Light is aimed at new researchers entering the VLC domain, particularly at the PhD stage, or those wishing to explore new areas within it, and readers should be comfortable with undergraduate-level mathematics and physics to make the most of the derivations and descriptions written throughout the book. It will provide researchers with a solid summary of the global progress in VLC systems that can be used to generate new ideas and advancements in the field.

Paul Anthony Haigh is a lecturer in communications at the Intelligent Sensing and Communications (ISC) group at Newcastle University. His research has focused on highly spectrally efficient communications systems with particular focus on visible light communication with applied digital signal processing and artificial intelligence.