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dc.contributor.authorRytír, Martin
dc.contributor.authorCheffena, Michael
dc.contributor.authorGrotthing, Per Arne
dc.contributor.authorBråten, Lars Erling
dc.contributor.authorTjelta, Terje
dc.date.accessioned2017-09-25T12:18:19Z
dc.date.available2017-09-25T12:18:19Z
dc.date.created2017-09-20T12:37:08Z
dc.date.issued2017
dc.identifier.issn0018-926X
dc.identifier.urihttp://hdl.handle.net/11250/2456544
dc.description.abstractAnalysis of two years of measurements from a three-site satellite beacon diversity experiment in Norway is presented. The operating frequency was 19.68 GHz, elevation angles were between 21.7° and 22°, and site separations 23, 29.7 and 50.1 km. Due to spatial decorrelation of rain, combined attenuation at these sites occurs much less frequently than at a single site. All three two-site combinations and a three-site combination were investigated. Measured values for diversity gain at 0.01% exceedance level were 8.8, 10.7 and 12.1 dB for the two-site pairs and 12.5 dB for three-sites, given a single site attenuation level between 13 and 16 dB. Comparison of the measured data showed excellent agreement with current ITU-R models. Fade duration statistics for single-site and for the combinations are analyzed and it is shown that the statistics for the diversity combinations can be modelled using a double-lognormal function as is the case for single-site statistics. Analysis of the effects of a non-ideal switch-over scheme showed that using moderate switch-over threshold levels and time delays, the number of switch-overs can be significantly reduced while most of the diversity gain and reduction in number of fades is retained.nb_NO
dc.language.isoengnb_NO
dc.publisherInstitute of Electrical and Electronics Engineersnb_NO
dc.titleThree-Site Diversity at Ka-Band Satellite Links in Norway: Gain, Fade Duration and the Impact of Switching Schemesnb_NO
dc.typeJournal articlenb_NO
dc.typePeer reviewednb_NO
dc.description.versionacceptedVersionnb_NO
dc.source.journalIEEE Transactions on Antennas and Propagationnb_NO
dc.identifier.doi10.1109/TAP.2017.2751667
dc.identifier.cristin1495818
dc.description.localcode(c) 2017 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other users, including reprinting/ republishing this material for advertising or promotional purposes, creating new collective works for resale or redistribution to servers or lists, or reuse of any copyrighted components of this work in other works.nb_NO
cristin.unitcode194,0,0,0
cristin.unitcode194,18,25,21
cristin.unitnameNorges teknisk-naturvitenskapelige universitet
cristin.unitnameSeksjon for elektro og maskin
cristin.ispublishedtrue
cristin.fulltextpreprint
cristin.qualitycode1


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