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Sensors 2014, 14(12), 24004-24028; doi:10.3390/s141224004

Radio Characterization for ISM 2.4 GHz Wireless Sensor Networks for Judo Monitoring Applications

1
Electrical and Electronic Engineering Department, Public University of Navarre, Pamplona 31006, Spain
2
Computer and Mathematics Engineering Department, Public University of Navarre, Pamplona 31006, Spain
*
Author to whom correspondence should be addressed.
Received: 15 October 2014 / Revised: 26 November 2014 / Accepted: 3 December 2014 / Published: 12 December 2014

Abstract

In this work, the characterization of the radio channel for ISM 2.4GHz Wireless Sensor Networks (WSNs) for judo applications is presented. The environments where judo activity is held are usually complex indoor scenarios in terms of radiopropagation due to their morphology, the presence of humans and the electromagnetic interference generated by personal portable devices, wireless microphones and other wireless systems used by the media. For the assessment of the impact that the topology and the morphology of these environments have on electromagnetic propagation, an in-house developed 3D ray-launching software has been used in this study. Time domain results as well as estimations of received power level have been obtained for the complete volume of a training venue of a local judo club’s facilities with a contest area with the dimensions specified by the International Judo Federation (IJF) for international competitions. The obtained simulation results have been compared with measurements, which have been carried out deploying ZigBee-compliant XBee Pro modules at presented scenario, using approved Judogis (jacket, trousers and belt). The analysis is completed with the inclusion of an in-house human body computational model. Such analysis has allowed the design and development of an in house application devoted to monitor the practice of judo, in order to aid referee activities, training routines and to enhance spectator experience. View Full-Text
Keywords: judo; wireless sensor networks; ray-launching; ISM 2.4 GHz band; ZigBee; monitoring application judo; wireless sensor networks; ray-launching; ISM 2.4 GHz band; ZigBee; monitoring application
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Lopez-Iturri, P.; Aguirre, E.; Azpilicueta, L.; Astrain, J.J.; Villadangos, J.; Falcone, F. Radio Characterization for ISM 2.4 GHz Wireless Sensor Networks for Judo Monitoring Applications. Sensors 2014, 14, 24004-24028.

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