Optical wireless communications for high-speed in-building personal area networks

Abstract

In this paper, we review our recent progress in optical wireless communication systems incorporating infra-red free-space link for in-building personal area networks. We have previously demonstrated a high-speed infrared optical wireless system incorporating localization function that enables limited mobility. Our system is based on light-of-sight transmission but with slightly diffused beam to relax the tight alignment requirement of traditional free-space links. We have demonstrated multi-gigabit/s full-duplex transmission with limited user mobility for 10 Gb/s downlink and 2 Gb/s uplink.