Design and Experimental Characterization of a Discovery and Tracking System for Optical Camera Communications
Autor: | Jose Rabadan, Rafael Perez-Jimenez, Cristo Jurado-Verdu, Antonio Mederos-Barrera, Victor Guerra |
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Jazyk: | angličtina |
Rok vydání: | 2021 |
Předmět: |
Computer science
Real-time computing Latency (audio) Visible light communication 02 engineering and technology TP1-1185 Tracking (particle physics) Biochemistry Article Analytical Chemistry 0202 electrical engineering electronic engineering information engineering Electrical and Electronic Engineering optical camera communications tracking system Instrumentation Wearable technology business.industry detection system K parameters Chemical technology Transmitter 020206 networking & telecommunications Tracking system Atomic and Molecular Physics and Optics test system for tracking systems Transmission (telecommunications) RGB color model 020201 artificial intelligence & image processing discovery system business |
Zdroj: | Sensors Volume 21 Issue 9 Sensors (Basel, Switzerland) Sensors, Vol 21, Iss 2925, p 2925 (2021) |
ISSN: | 1424-8220 |
DOI: | 10.3390/s21092925 |
Popis: | Visible light communications (VLC) technology is emerging as a candidate to meet the demand for interconnected devices’ communications. However, the costs of incorporating specific hardware into end-user devices slow down its market entry. Optical camera communication (OCC) technology paves the way by reusing cameras as receivers. These systems have generally been evaluated under static conditions, in which transmitting sources are recognized using computationally expensive discovery algorithms. In vehicle-to-vehicle networks and wearable devices, tracking algorithms, as proposed in this work, allow one to reduce the time required to locate a moving source and hence the latency of these systems, increasing the data rate by up to 2100%. The proposed receiver architecture combines discovery and tracking algorithms that analyze spatial features of a custom RGB LED transmitter matrix, highlighted in the scene by varying the cameras’ exposure time. By using an anchor LED and changing the intensity of the green LED, the receiver can track the light source with a slow temporal deterioration. Moreover, data bits sent over the red and blue channels do not significantly affect detection, hence transmission occurs uninterrupted. Finally, a novel experimental methodology to evaluate the evolution of the detection’s performance is proposed. With the analysis of the mean and standard deviation of novel K parameters, it is possible to evaluate the detected region-of-interest scale and centrality against the transmitter source’s ideal location. |
Databáze: | OpenAIRE |
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