ABSTRACT
Chapter 8 covers the basics, the fundamental principle of visible light communications (VLC). This chapter discusses the history of the topical VLC, its application areas, its design and modulation techniques, and its challenges. Various methods of achieving diming are also covered, as well as cellular concepts in VLC. The use of multiple transmitters to simultaneously send an independent data stream to provide spatial multiplexing gains in VLC are covered in this chapter as well. Organic optoelectronic devices have proven very promising in recent years, and in this chapter we present the use of organic LEDs for VLC and various equalisation and signal processing techniques that can be used to improve the limited bandwidth of the organic devices.
