Transmission of Signals Using White LEDs for VLC Application

P Louro, V Silva, J Costa, MA Vieira, M Vieira - MRS Advances, 2016 - Springer
In this paper a photodetector working as an active optical filter device is used to detect
modulated visible optical signals for applications based on Visible Light Communication …

Indoors positioning through VLC technology using an a-SiC: H photodetector

P Louro, J Costa, M Vieira… - … on Applications of Optics …, 2017 - spiedigitallibrary.org
The work presented in this paper supports the viability of a navigation system based on
Visible Light Communication (VLC) for indoors applications. The system design uses RGB …

MUX/DEMUX SiC receiver for visible light communications

M Vieira, MA Vieira, P Louro - Microsystem Technologies, 2020 - Springer
In this paper we present a MUX/DEMUX device based on a multilayer a-SiC: H optical filter
that requires near-ultraviolet steady state optical switches to select desired wavelengths in …

Fine-grained indoor localization: optical sensing and detection

M Vieira, MA Vieira, P Louro, P Vieira… - Optical Sensing and …, 2018 - spiedigitallibrary.org
A LED-assisted navigation system for large indoor environments is proposed. White LEDs
are used both for illumination purposes and as transmitters. On-off keying modulation …

Geo-localization using indoor visible light communication

P Louro, M Vieira, P Vieira, J Rodrigues… - Optical Sensors …, 2021 - spiedigitallibrary.org
Nowadays, Global Positioning Systems (GPS) are used everywhere for positioning and
navigation. However, its use is not suitable in indoor environment, due to power budget …

Geolocation and communication in unfamiliar indoor environments through visible light

M Vieira, MA Vieira, P Louro… - … and Applications XXV, 2021 - spiedigitallibrary.org
To support people's wayfinding activities in unfamiliar indoor environments, a method able
to generate ceiling landmark route instructions using Visible Light Communication (VLC) is …

Investigation of code division multiplexing technique for VLC-based indoor positioning

G Szabó - 2015 17th International Conference on Transparent …, 2015 - ieeexplore.ieee.org
The visible light communication (VLC) with LED lamps is a very promising technique which
can be a possible alternative to certain simplex radio connections aiming to relieve the …

Hadamard matrix design for a low-cost indoor positioning system in visible light communication

JK Park, TG Woo, M Kim, JT Kim - IEEE Photonics Journal, 2017 - ieeexplore.ieee.org
A positioning system based on visible light communication (VLC) utilizes illuminating indoor
lights to identify the location of objects. The complexity and the cost of VLC are largely …

Positioning and advertising in large indoor environments using visible light communication

M Vieira, M Vieira, P Louro, P Vieira - Optical Engineering, 2019 - spiedigitallibrary.org
We investigate the applicability of an intuitive advertising system for large indoor
environments using visible light communication (VLC). This VLC-based positioning system …

Visible light ID system for indoor localization

S Ayub, S Kariyawasam, M Honary, B Honary - 2013 - IET
In recent years visible light communication (VLC) has been matured as an emerging
wireless optical technology. Main attraction of VLC is its dual functionality of providing …