From Sound to Sight: Using Audio Processing to enable Visible Light Communication

Mobile phones can use their cameras and flashlight Light Emitting Diodes (LEDs) to exchange messages with low complex Visible Light Communication (VLC) networks, but these interfaces impose serious restrictions when used in a VLC network. In this paper we discuss how to extend mobile phones or tablets with a small peripheral device that is battery-free, uses only passive components, and offers VLC capabilities at the required data rate (kilobit per second).

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