ABSTRACT
This chapter considers the indoor visible light communications (VLC) systems that are mainly based on the color-clustering (CC) methods. In a recent trend associated with smart homes, VLC is also a good candidate in context of smart indoor wireless technology. Considering the optical shadowing effect existent in an indoor environment, a unique design of an optical bidirectional beacon (OBB) is also illustrated. In a color-cluster environment, a color cluster is formed by dividing an array of red, green, and blue (RGB) light-emitting diodes (LEDs) into three primary colors. In color-cluster multiuser VLC system, different users are allocated into three primary colors defined as color clusters; cluster r, cluster g, and cluster b. Smart home technology has recently attracted much attention as smart devices are ubiquitous at home. The use of IR may limit versatility in smart home technologies compared with VLC, because VLC usually offers illumination plus wireless connections and more diverse control with motion detection for smart home devices.
