Data-Aided Color Shift Keying Transmission for LCD-to-Smartphone Optical Camera Communication Links

Abstract

We propose and experimentally validate a data-aided optical camera communication link between commercially available liquid crystals display (LCD) transmitter and smartphone rear camera receiver. The wireless link has been tested on 4, 8 and 16-color shift keying (CSK) modulated signals and paired with an offline artificial neural network-based classification strategy to overcome distortions and disparities in the color representation. For a low luminosity transmitter of 250 cd/m2 and a 12-megapixels camera with 60 fps capture rate placed at 50 cm away were reached 1.95 kbps at 100% symbol classification accuracy, 2.93 kbps at 96.4% and 4.86 kbps at 93.8% for 4, 8 and 16-CSK, respectively.