Experimental Validation of the Color-Hopping Space-Time (CHST) Scheme for Optical Camera Communication (OCC) Systems

Abstract

Visible Light Communication (VLC) and Optical Camera Communication (OCC) are recent viable technologies for wireless communication, using existing lighting infrastructure and conventional cameras. The Color-Hopping Space-Time (CHST) scheme is a promising technique for VLC/OCC, introducing permutations in the mapping between symbols and colors. This work presents the first experimental validation of CHST in an OCC system, using an RGB LED array and a camera, with an accessible implementation based on low-cost hardware. The results confirm improvements in channel conditioning, BER reduction, and increased communication range with the use of the CHST scheme.