Gb/s visible light communication with analogue single-colour LED receiver

摘要

Visible light communication bears the potential to deliver high data rates in the Gb/s range while being robust to electromagnetic interference. To do so, optical wireless systems exploit sophisticated transmitter and receiver sub-systems that appear as too custom for a practical inclusion in most consumer electronics. Instead, we propose the re-use of widely adopted lighting equipment: the light emitting diode. We experimentally demonstrate a conceptually simple laser-sourced 1 Gb/s VLC downlink with a receiver based on a commercial single-colour LED. While adaptive bit-loading is applied for multi-carrier transmission to best exploit the available bandwidth, the penalty due to broadband modulation at 1 Gb/s is minimized through analogue frequency response equalization. By accommodating for duobinary transmission, cost-effectiveness is ultimately provided through the dismissal of broadband analogue-to-digital conversion and digital signal processing.