Home // International Journal On Advances in Intelligent Systems, volume 12, numbers 1 and 2, 2019 // View article

Light-Fidelity (Li-Fi) LED assisted navigation in large indoor environments

Authors:
Manuela Vieira
Manuel Augusto Vieira
Paula Louro
Pedro Vieira
Alessandro Fantoni

Keywords: Visible Light Communication; Indoor positioning; Square and hexagonal topologies; SiC technology; Optical sensor, Navigation system; Bidirectional communication.

Abstract:
In this work, a Light Emitting Diode (LED) assisted navigation system for large environments is presented. The LEDs are used both for room illumination purposes and as transmitters if modulated at high frequencies. The payload data together with the identifiers, IDs, assigned to the physical location of the transmitters are broadcast using an On-Off Keying (OOK) modulated scheme. The mobile receiver is a double p-i-n/pin SiC photodetector with light controlled filtering properties. Coded multiplexing techniques for supporting communications and navigation together on the same channel are analysed. A demonstration of fine-grained indoor localization is simulated. Different indoor layouts for the LEDs are considered. Square and hexagon mesh are tested, and a 2D localization design, demonstrated by a prototype implementation, is presented. The results showed that the LED-aided Visible Light Communication (VLC) navigation system makes possible not only to determine the position of a mobile target inside the unit cell but also in the network and concomitantly to infer the travel direction in time. Bidirectional communication was tested between the infrastructure and the mobile receiver.

Pages: 50 to 59

Copyright: Copyright (c) to authors, 2019. Used with permission.

Publication date: June 30, 2019

Published in: journal

ISSN: 1942-2679