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Sensors 2017, 17(2), 330; doi:10.3390/s17020330

Hybrid Visible Light and Ultrasound-Based Sensor for Distance Estimation

1
IDeTIC, Universidad de Las Palmas de Gran Canaria, PCT Tafira, 35017 Las Palmas, Spain
2
Facultad de Ciencias, Universidad Autónoma de San Luis Potosi, Avda Salvador Nava S/N, 78290 San Luis Potosi, Mexico
*
Author to whom correspondence should be addressed.
Academic Editors: Dipen N. Sinha, Cristian Pantea and Xiaoning Jiang
Received: 7 December 2016 / Revised: 18 January 2017 / Accepted: 7 February 2017 / Published: 10 February 2017
(This article belongs to the Special Issue Ultrasonic Sensors)
View Full-Text   |   Download PDF [2913 KB, uploaded 13 February 2017]   |  

Abstract

Distance estimation plays an important role in location-based services, which has become very popular in recent years. In this paper, a new short range cricket sensor-based approach is proposed for indoor location applications. This solution uses Time Difference of Arrival (TDoA) between an optical and an ultrasound signal which are transmitted simultaneously, to estimate the distance from the base station to the mobile receiver. The measurement of the TDoA at the mobile receiver endpoint is proportional to the distance. The use of optical and ultrasound signals instead of the conventional radio wave signal makes the proposed approach suitable for environments with high levels of electromagnetic interference or where the propagation of radio frequencies is entirely restricted. Furthermore, unlike classical cricket systems, a double-way measurement procedure is introduced, allowing both the base station and mobile node to perform distance estimation simultaneously. View Full-Text
Keywords: visible light communications; optical wireless communications; visible light positioning; cricket sensor; distance measurement visible light communications; optical wireless communications; visible light positioning; cricket sensor; distance measurement
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Rabadan, J.; Guerra, V.; Rodríguez, R.; Rufo, J.; Luna-Rivera, M.; Perez-Jimenez, R. Hybrid Visible Light and Ultrasound-Based Sensor for Distance Estimation. Sensors 2017, 17, 330.

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