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Low-cost SDR-based Tool for Evaluating LoRa Satellite Communications
Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Systems and Technology. University of Brescia.
Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Systems and Technology.ORCID iD: 0000-0003-3717-7793
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2022 (English)In: 2022 IEEE International Symposium on Measurements and Networking, M and N 2022 - Proceedings, IEEE conference proceedings, 2022Conference paper, Published paper (Refereed)
Abstract [en]

LoRa (Long Range) technology, with great success in providing coverage for massive Internet-of-things (IoT) deployments, is recently being considered to complement the terrestrial networks with Low Earth Orbit (LEO) satellite connectivity. The objective is to extend coverage to remote areas for various verticals, such as logistics, asset tracking, transportation, utilities, agriculture, and maritime. However, only limited studies have realistically evaluated the effects of ground-to-satellite links due to the high cost of traditional tools and methods to emulate the radio channel. In this paper, compared to an expensive channel emulator, we propose and develop an alternative method for the experimental study of LoRa satellite links using lower-cost software defined radio (SDR). Since the working details of LoRa modulation are limited to the reverse-engineered imitations, we employ such a version on SDR platform and add easily controllable adverse channel effects to evaluate LoRa for satellite connectivity. In our work, the emulation of the Doppler effect is considered as a key aspect for testing the reliability of LoRa satellite links. Therefore, after demonstrating the correctness of the (ideal) L oRa transceiver implementation, achieving a low packet error ratio (PER) with a commercial L oRa receiver, the baseband signal is distorted to emulate the Doppler effect, mimicking a real LoRa satellite communication. The Doppler effect is related to time-on-air (ToA), bounded to communication parameters and orbit height. Higher ToAs and lower orbits decrease the link duration, mainly because of dynamic Doppler effect. 

Place, publisher, year, edition, pages
IEEE conference proceedings, 2022.
Keywords [en]
Doppler effect, Internet-of-things, LEO satellite, LoRa, Satellite channel emulation, Software Defined Radio
National Category
Signal Processing
Identifiers
URN: urn:nbn:se:miun:diva-46418DOI: 10.1109/MN55117.2022.9887761ISI: 000885015100038Scopus ID: 2-s2.0-85140890235ISBN: 9781665483629 (print)OAI: oai:DiVA.org:miun-46418DiVA, id: diva2:1709699
Conference
6th IEEE International Symposium on Measurements and Networking, M and N 2022, 18 July 2022 through 20 July 2022
Available from: 2022-11-09 Created: 2022-11-09 Last updated: 2022-12-01Bibliographically approved

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Mahmood, AamirSisinni, EmilianoGidlund, Mikael

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Citation style
  • apa
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