On-off keying and Manchester coding in a visible light communication link

P. Louro; J. Rocha; M. Vieira; M. A. Vieira

doi:10.1117/12.2648884

15 March 2023 On-off keying and Manchester coding in a visible light communication link

P. Louro, J. Rocha, M. Vieira, M. A. Vieira

Proceedings Volume 12429, Next-Generation Optical Communication: Components, Sub-Systems, and Systems XII; 1242910 (2023) https://doi.org/10.1117/12.2648884
Event: SPIE OPTO, 2023, San Francisco, California, United States

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.

Conference Presentation

Citation Download Citation

P. Louro, J. Rocha, M. Vieira, and M. A. Vieira "On-off keying and Manchester coding in a visible light communication link", Proc. SPIE 12429, Next-Generation Optical Communication: Components, Sub-Systems, and Systems XII, 1242910 (15 March 2023); https://doi.org/10.1117/12.2648884

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