Novel Extended Circular Color Shift Keying Constellation in VLC Systems with Camera-based Receivers

This paper investigates the bit-error probability of several color shift keying (CSK) constellations in a visible light communications (VLC) scenario with a camera-based receiver. A novel VLC communication constellation set, the extended circular CSK, is presented and analyzed. Its performance is compared to the CSK constellation described in the IEEE 802.15.7 standard, in addition to other constellations that were introduced previously, namely the geometric and circular CSK constellations. The bit-error rate (BER) of the proposed extended circular CSK constellation is studied. Simulation results show that the extended circular CSK significantly outperforms the other constellations and deserves further research attention in the future.