@inproceedings{5f1b1f3ad5714613bc32e3e710d3a90a,
title = "On-off keying and Manchester coding in a visible light communication link",
abstract = "Increasing interest in indoor navigation has recently been generated by devices with wireless communication capabilities that enabled a wide range of applications and services. The rise of the Internet of Things (IoT) and the inherent end-to-end connectivity of billions of devices is very attractive for indoor localization and proximity detection. Other fields, such as, marketing and customer assistance, health services, asset management and tracking, can also benefit from indoor localization. Different techniques and wireless technologies have been proposed for indoor location, as the traditional Global Positioning System (GPS) has a very poor, unreliable performance in a closed space. The work presented in this research proposes the use of an indoor localization system based on Visible Light Communication (VLC) to support the navigation and operational tasks of Autonomous Guided Vehicles (AVG) in an automated warehouse. The research is mainly focused on the development of the navigation VLC system, transmission of control data information and decoding techniques. As part of the communication system, trichromatic white LEDs are used as emitters and a-SiC:H/a-Si:H based photodiodes with selective spectral sensitivity, are used as receivers. Through the modulation of the RGB LEDs, the downlink channel establishes an infrastructure-to-vehicle link (I2V) and provides position information to the vehicle. The decoding strategy is based on accurate calibration of the output signal. Characterization of the transmitters and receivers, description of the coding schemes and the use of different modulations will be the focus of discussion in this paper.",
keywords = "Footprint maps, Manchester codes, On-off keying, Visible light communication",
author = "P. Louro and J. Rocha and M. Vieira and Vieira, {M. A.}",
note = "Funding Information: This work was sponsored by FCT – Funda{\c c}{\~a}o para a Ci{\^e}ncia e a Tecnologia, within the Research Unit CTS – Center of Technology and systems, reference UID/EEA/00066/2020 and IPL/2022/POSEIDON_ISEL. Publisher Copyright: {\textcopyright} 2023 SPIE.; Next-Generation Optical Communication: Components, Sub-Systems, and Systems XII 2023 ; Conference date: 31-01-2023 Through 02-02-2023",
year = "2023",
month = mar,
day = "15",
doi = "10.1117/12.2648884",
language = "English",
series = "Proceedings of SPIE - The International Society for Optical Engineering",
publisher = "SPIE-International Society for Optical Engineering",
editor = "Guifang Li and Kazuhide Nakajima and Srivastava, {Atul K.}",
booktitle = "Next-Generation Optical Communication",
}