Influence of Receiver Orientation on Differential Polarization-based VLC

Visible Light Communication (VLC) has received substantial research attention in the last decade. The vast majority of VLC focuses on the modulation of the transmitted light intensity. In this work, however, the intensity is kept constant while the polarization direction is deployed as a carrier of information. Data is demodulated using a differential receiver equipped with orthogonal polarizers. An analytical expression to evaluate the Signal-to-Noise Ratio (SNR) as a function of the rotation angle of the receiver is derived and validated in an experimental setup. This work demonstrates the potential of polarization based modulation in the field of VLC.