Indoor white light wireless data transmission based on new generation environment-friendly solid state lighting

摘要

White light emitting diode (LED) is viewed as the new generation green solid state lighting (SSL) source by academia and industry based on its charming advantages, such as high brightness, low cost, steadily improved power efficiency and etc. Visible light communication based on white LED which aims to realize lighting and data transmission simultaneously is attracting more and more attention. In this paper, two indoor VLC design schemes which need less power cost are proposed and corresponding illuminance ability is estimated in a moderate size office. One proves that distributed design scheme can improve the power efficiency (add 300 lx in central area) and related SNR performance is improved as well. And the other illustrates the amount of needed chips can be reduced (from 900 to less than 800) maintaining the similar illuminance level. The performance of systems based on improved modulation schemes in terms of pulse position modulation (PPM), multiple pulse position modulation (MPPM) and overlapping pulse position modulation (OPPM) are tested.