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dc.contributor.authorXu, Haoen_US
dc.date.accessioned2014-03-14T20:11:31Z
dc.date.available2014-03-14T20:11:31Z
dc.date.issued2000-04-26en_US
dc.identifier.otheretd-05042000-16180036en_US
dc.identifier.urihttp://hdl.handle.net/10919/27522
dc.description.abstractThis research focuses on radio wave propagation at millimeter-wave frequencies. A measurement based channel characterization approach is taken in the investigation. First, measurement techniques are analyzed. Three types of measurement systems are designed, and implemented in measurement campaigns: a narrowband measurement system, a wideband measurement system based on Vector Network Analyzer, and sliding correlator systems at 5.8+AH4AXA-mbox{GHz}, 38+AH4AXA-mbox{GHz} and 60+AH4AXA-mbox{GHz}. The performances of these measurement systems are carefully compared both analytically and experimentally. Next, radio wave propagation research is performed at 38+AH4AXA-mbox{GHz} for Local Multipoint Distribution Services (LMDS). Wideband measurements are taken on three cross-campus links at Virginia Tech. The goal is to determine weather effects on the wideband channel properties. The measurement results include multipath dispersion, short-term variation and signal attenuation under different weather conditions. A design technique is developed to estimate multipath characteristics based on antenna patterns and site-specific information. Finally, indoor propagation channels at 60+AH4AXA-mbox{GHz} are studied for Next Generation Internet (NGI) applications. The research mainly focuses on the characterization of space-time channel structure. Multipath components are resolved both in time of arrival (TOA) and angle of arrival (AOA). Results show an excellent correlation between the propagation environments and the channel multipath structure. The measurement results and models provide not only guidelines for wireless system design and installation, but also great insights in millimeter-wave propagation.en_US
dc.publisherVirginia Techen_US
dc.relation.haspartfinal.pdfen_US
dc.rightsI hereby grant to Virginia Tech or its agents the right to archive and to make available my thesis or dissertation in whole or in part in the University Libraries in all forms of media, now or hereafter known. I retain all proprietary rights, such as patent rights. I also retain the right to use in future works (such as articles or books) all or part of this thesis or dissertation.en_US
dc.subjectBMSen_US
dc.subjectchannel measurementsen_US
dc.subjectchannel modelsen_US
dc.subjectLMDSen_US
dc.subjectbroadband wirelessen_US
dc.subject60 GHzen_US
dc.subjectradio wave propagationen_US
dc.subjectwireless communicationsen_US
dc.subject38 GHzen_US
dc.subjectmillimeter-waveen_US
dc.subjectNGIen_US
dc.titleTerrestrial radio wave propagation at millimeter-wave frequenciesen_US
dc.typeDissertationen_US
dc.contributor.departmentElectrical and Computer Engineeringen_US
dc.description.degreePh. D.en_US
thesis.degree.namePh. D.en_US
thesis.degree.leveldoctoralen_US
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen_US
thesis.degree.disciplineElectrical and Computer Engineeringen_US
dc.contributor.committeechairRappaport, Theodore S.en_US
dc.contributor.committeememberPratt, Timothy J.en_US
dc.contributor.committeememberWoerner, Brian D.en_US
dc.contributor.committeememberKohler, Werner E.en_US
dc.contributor.committeememberde Wolf, David A.en_US
dc.contributor.committeememberBrown, Gary S.en_US
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-05042000-16180036/en_US
dc.date.sdate2000-05-04en_US
dc.date.rdate2001-05-05
dc.date.adate2000-05-05en_US


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