Adaptive power control as a fade countermeasure on satellite links

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dc.contributor.authorSweeney, Dennis G.en
dc.contributor.committeechairBostian, Charlesen
dc.contributor.committeememberBaumann, William T.en
dc.contributor.committeememberBrown, T.en
dc.contributor.committeememberKohler, Werneren
dc.contributor.committeememberPratt, Timothyen
dc.contributor.departmentElectrical Engineeringen
dc.date.accessioned2014-03-14T21:20:43Zen
dc.date.adate2005-10-10en
dc.date.available2014-03-14T21:20:43Zen
dc.date.issued1993en
dc.date.rdate2005-10-10en
dc.date.sdate2005-10-10en
dc.description.abstractSatellite systems in the 20/30 GHz band are very susceptible to outages due to rain-induced fades. In order to reduce the impact of these fades, it has been proposed that the power of the uplink station transmitter be adjusted during the fade to compensate. This dissertation will explore some of the issues involved in implementing this uplink power control (ULPC). Fade slope is examined as a parameter to predict signal strength during a fade. A fade slope model based on fade physics is presented, but it strongly suggests that fade slope is not an appropriate parameter for ULPC. Real time scaling of attenuation from the downlink to the uplink shows more promise for ULPC. Differences in drop size distributions during a rain storm will result is different scaling factors. If the downlink attenuation is limited to 6 dB at 20 GHz, real time scaling can be accomplished. A scaling type ULPC algorithm driven by downlink attenuation is tested on 66 hours of OLYMPUS 20/30 GHz fade data. A similar algorithm driven by uplink attenuation is tested and the performance of the two algorithms is presented and compared.en
dc.description.degreePh. D.en
dc.format.extentxxi, 148 leavesen
dc.format.mediumBTDen
dc.format.mimetypeapplication/pdfen
dc.identifier.otheretd-10102005-131558en
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-10102005-131558/en
dc.identifier.urihttp://hdl.handle.net/10919/39716en
dc.language.isoenen
dc.publisherVirginia Techen
dc.relation.haspartLD5655.V856_1993.S944.pdfen
dc.relation.isformatofOCLC# 27864505en
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subject.lccLD5655.V856 1993.S944en
dc.subject.lcshRadio -- Transmitters and transmission -- Fadingen
dc.subject.lcshSatellite power transmissionen
dc.titleAdaptive power control as a fade countermeasure on satellite linksen
dc.typeDissertationen
dc.type.dcmitypeTexten
thesis.degree.disciplineElectrical Engineeringen
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen
thesis.degree.leveldoctoralen
thesis.degree.namePh. D.en

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