title: Hybrid Visible Light and Ultrasound-Based Sensor for Distance Estimation.
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.
authors.affiliation: IDeTIC, Universidad de Las Palmas de Gran Canaria, PCT Tafira, 35017 Las Palmas, Spain. jose.rabadan@ulpgc.es.
authors.forename: Jose
authors.initials: J
authors.lastname: Rabadan
authors.affiliation: IDeTIC, Universidad de Las Palmas de Gran Canaria, PCT Tafira, 35017 Las Palmas, Spain. vguerra@idetic.eu.
authors.forename: Victor
authors.initials: V
authors.lastname: Guerra
authors.affiliation: IDeTIC, Universidad de Las Palmas de Gran Canaria, PCT Tafira, 35017 Las Palmas, Spain. rrodrihe@gmail.com.
authors.forename: Rafael
authors.initials: R
authors.lastname: Rodríguez
authors.affiliation: IDeTIC, Universidad de Las Palmas de Gran Canaria, PCT Tafira, 35017 Las Palmas, Spain. jrufo@idetic.eu.
authors.forename: Julio
authors.initials: J
authors.lastname: Rufo
authors.affiliation: Facultad de Ciencias, Universidad Autónoma de San Luis Potosi, Avda Salvador Nava S/N, 78290 San Luis Potosi, Mexico. mlr@uaslp.mx.
authors.forename: Martin
authors.initials: M
authors.lastname: Luna-Rivera
authors.affiliation: IDeTIC, Universidad de Las Palmas de Gran Canaria, PCT Tafira, 35017 Las Palmas, Spain.
authors.forename: Rafael
authors.initials: R
authors.lastname: Perez-Jimenez
keywords: cricket sensor; distance measurement; optical wireless communications; visible light communications; visible light positioning