Multi-User Visible Light Communication and Positioning System Based on Multiplexing Technology

Visible light communication and positioning (VLCP) is a promising technology for constructing a multifunctional wireless network that provides simultaneous high-speed communication and high-precision positioning functions. To simultaneously transmit various and complex visible light communication (VLC) and visible light positioning (VLP) signals of multiple users, multiplexing technologies are necessarily adopted in VLCP systems. This paper reviews and analyzes the VLCP system designs based on conventional multiplexing technologies, including time division multiplexing, frequency division multiplexing, and code division multiplexing. And we propose a multi-user VLCP system based on the dual-domain multiplexing scheme, where the VLC and VLP signals of multiple users are effectively integrated and transmitted through multiplexing the time and code resources. The results show the proposed method is potential to simultaneously offer error-free VLC and high-precise VLP functions for multiple users.