Visible Light Communication System and Method Using Color-shift Keying

摘要

The present invention provides a visible light communication transmitter 13, a visible light communication receiver 14, a visible light communication system 2, and a visible light communication method, wherein the transmitter, receiver, system and method are color shift keying (CSK). And a color-shift keying method. The visible light communication transmitter 13 has six, preferably seven, more preferably eight or more graphene-based light emitting elements (LED-1, LED-2, ... LED-8) of different peak transmission wavelengths. It includes. The visible light communication receiver 14 comprises graphene-based photodetectors PD-1, PD-2, ... PD-8 of a corresponding number of different peak reception wavelengths. The visible light communication system according to the present invention includes such a transmitter and such a receiver, each of the different peak reception wavelengths of the six graphene-based photodetectors corresponding to each one of the other peak transmission wavelengths of the graphene-based light emitting devices. . Such a system allows a method of visible light communication using color groups of at least six, possibly seven or even eight primary colors, preferably using color-shift keying. They can provide an increased number of symbols, reduced symbol error rate and improved signal-to-noise ratio compared to conventional visible light communication systems for color-shift keying using only three or four primary color groups. .