Spotlighting for Visible Light Communications and Illumination
The trend toward solid state lighting with white LEDs has motivated much research for using these devices to provide wireless broadband data communications. Much work in this area has attempted to fit VLC into currently dominant indoor lighting modes. In this paper the authors explore spotlighting, which is appropriate lighting for many scenarios, as an alternative for implementing high data rate VLC. They find that spotlighting VLC has several benefits over uniform lighting implementations, including enabling higher data rate densities within a room and less channel distortion. They also introduce a hybrid scheme that combines spotlighting with uniform lighting to provide wide area data coverage as well as high-data rate "White hot spots" where needed.