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Sensors 2017, 17(8), 1903; https://doi.org/10.3390/s17081903

LoRa Mobile-To-Base-Station Channel Characterization in the Antarctic

Department of Information Technology, Ghent University/imec, Technologiepark-Zwijnaarde 15, 9052 Gent, Belgium
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Received: 12 July 2017 / Revised: 13 August 2017 / Accepted: 16 August 2017 / Published: 18 August 2017
(This article belongs to the Section Sensor Networks)
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Abstract

Antarctic conditions demand that wireless sensor nodes are operational all year round and that they provide a large communication range of several tens of kilometers. LoRa technology operating in sub-GHz frequency bands implements these wireless links with minimal power consumption. The employed chirp spread spectrum modulation provides a large link budget, combined with the excellent radio-wave propagation characteristics in these bands. In this paper, an experimental wireless link from a mobile vehicle which transmits sensor data to a base station is measured and analyzed in terms of signal-to-noise ratio and packet loss. These measurements confirm the usefulness of LoRa technology for wireless sensor systems in polar regions. By deploying directional antennas at the base station, a range of up to 30 km is covered in case of Line-of-Sight radio propagation in both the 434 and 868 MHz bands. Varying terrain elevation is shown to be the dominating factor influencing the propagation, sometimes causing the Line-of-Sight path to be obstructed. Tropospheric radio propagation effects were not apparent in the measurements. View Full-Text
Keywords: LoRa; antenna; propagation; measurement; Antarctic LoRa; antenna; propagation; measurement; Antarctic
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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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Gaelens, J.; Van Torre, P.; Verhaevert, J.; Rogier, H. LoRa Mobile-To-Base-Station Channel Characterization in the Antarctic. Sensors 2017, 17, 1903.

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