Magnitude matters: A new light-to-camera communication system with Multilevel Illumination

摘要

Light-to-camera communication has a great potential to benefit a wide range of applications, e.g., localization, advertising and WLAN management etc. We present the Multilevel Illumination Light-to-camera communication (MILC) system, which can substantially improve the system throughput. Different from the previous efforts, where the signals consisting two illumination levels are usually used, e.g., the on-off keying (OOK), we employ more than two illumination levels, e.g., three. Therefore, we can transmit the message in a more efficient way and thus substantially improve the system throughput. With the minimal updates, we have built a prototype based on the commercial off-the-shelf (COTS) light-emitting diode (LED) lamp to verify the proposed MILC system. The experiment results have demonstrated that MILC is effective and can improve the system throughput by more than 100%.