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dc.contributorUniversitat Ramon Llull. La Salle
dc.contributor.authorMasó Llinàs, Josep M.
dc.contributor.authorPorté Jiménez, Joaquim
dc.contributor.authorPijoan Vidal, Joan Lluís
dc.contributor.authorBadia Folguera, David
dc.date.accessioned2021-05-07T04:30:25Z
dc.date.accessioned2023-10-02T06:48:32Z
dc.date.available2021-05-07T04:30:25Z
dc.date.available2023-10-02T06:48:32Z
dc.date.created2020-04
dc.date.issued2020-06
dc.identifier.urihttp://hdl.handle.net/20.500.14342/3487
dc.description.abstractEvery year, the number of ubiquitous sensor networks (USN) is increasing and the need for remote USN communications is emerging in some scenarios. As an alternative to satellite communications, more interests are focused on high frequencies (HF) communications as a low-cost option to reach links of more than 250 km without a line of sight. The HF standards are designed for generic communication channels being not robust for near vertical incidence skywave (NVIS) USN. In this article, we propose a new protocol for USN in remote places based on NVIS communications. For that purpose, we study the main characteristics of the NVIS channel with the presence of groundwaves, particularly in Antarctica. We analyze the availability of the channel, the height of the layers, the delay spread, and the Doppler spread. On the basis of the results obtained, we propose two protocols based on an OFDM (orthogonal frequency division multiplexing) modulation depending on the presence of the groundwave at the receiver. Finally, we make a simulation of the two OFDM configurations and we compare it with real tested standard modulations. The results show a better performance of the new protocol compared to the current HF standards.
dc.format.extent21 p.cat
dc.language.isoengcat
dc.publisherMDPIcat
dc.relation.ispartofElectronics, 2020, Vol. 9, No. 6cat
dc.rightsAttribution 4.0 International
dc.rights© L'autor/a
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.sourceRECERCAT (Dipòsit de la Recerca de Catalunya)
dc.subject.otherOnes de ràdio -- Propagaciócat
dc.subject.otherIonosferacat
dc.titleStudy of NVIS Channel for USN Protocol Definition in Antarcticacat
dc.typeinfo:eu-repo/semantics/articlecat
dc.typeinfo:eu-repo/semantics/publishedVersioncat
dc.rights.accessLevelinfo:eu-repo/semantics/openAccess
dc.embargo.termscapcat
dc.subject.udc53
dc.subject.udc537
dc.identifier.doihttps://doi.org/10.3390/electronics9061037cat
dc.relation.projectIDinfo:eu-repo/grantAgreement/MINECO-AEI-FEDER/PN I+D/RTI2018-097066-B-I00cat


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Attribution 4.0 International
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