Digital Signal Processing for Light Emitting Diode Based Visible Light Communication

The realization of enhanced efficiency light emitting diodes (LED) and the trend to lower costs of LED lighting systems will facilitate their wider deployment in many applications. LED lighting system with the value-added functionality of optical wireless communication enables the deployment of a communication system with very little extra cost. Visible light communication (VLC) provides the merits of secure information exchange, harmlessness to human body, and excellent applicability in some radio-frequency (RF) restricted areas. In this work, we review some recent advances in VLC. We discuss the challenges faced by the VLC and some possible solutions. We discuss and show that using digital signal processing (DSP) can significantly enhance the VLC performance.