Show simple item record

dc.contributor.authorRamaSarma, Vaidyanathanen_US
dc.date.accessioned2014-03-14T20:46:18Z
dc.date.available2014-03-14T20:46:18Z
dc.date.issued2002-09-19en_US
dc.identifier.otheretd-10032002-113335en_US
dc.identifier.urihttp://hdl.handle.net/10919/35276
dc.description.abstractFirst-generation, line-of-sight (LOS) fixed broadband wireless access techniques have been around for several years. However, services based on this technology have been limited in scope to service areas where transceivers can communicate with their base stations, unimpeded by trees, buildings and other obstructions. This limitation has serious consequences in that the system can deliver only 50% to 70% coverage within a given cell radius, thus affecting earned revenue. Next generation broadband fixed wireless access techniques are aimed at achieving a coverage area greater than 90%. To achieve this target, these techniques must be based on a point-to-multipoint (PMP) cellular architecture with low base station antennas, thus possessing the ability to operate in true non-line-of-sight (NLOS) conditions. A possible limiting factor for these systems is link degradation due to interference. This thesis presents a new model to estimate the levels of co-channel interference for such systems operating within the 3.5 GHz multichannel multipoint distribution service (MMDS) band. The model is site-specific in that it uses statistical building/roof height distribution parameters obtained from practically modeling several metropolitan cities in the U.S. using geographic information system (GIS) tools. This helps to obtain a realistic estimate and helps analyze the tradeoff between cell radius and modulation complexity. Together, these allow the system designer to decide on an optimal location for placement of customer premises equipment (CPE) within a given cell area.en_US
dc.publisherVirginia Techen_US
dc.relation.haspartRamasarmaThesis.pdfen_US
dc.rightsI hereby certify that, if appropriate, I have obtained and attached hereto a written permission statement from the owner(s) of each third party copyrighted matter to be included in my thesis, dissertation, or project report, allowing distribution as specified below. I certify that the version I submitted is the same as that approved by my advisory committee. I hereby grant to Virginia Tech or its agents the non-exclusive license to archive and make accessible, under the conditions specified below, my thesis, dissertation, or project report in whole or in part in all forms of media, now or hereafter known. I retain all other ownership rights to the copyright of the thesis, dissertation or project report. I also retain the right to use in future works (such as articles or books) all or part of this thesis, dissertation, or project report.en_US
dc.subjectFixed Broadband Wireless Access (FBWA)en_US
dc.subjectCo-channel Interferenceen_US
dc.subjectPoint-to-Multipoint (PMP)en_US
dc.subjectNon-Line-of-Sight (NLOS)en_US
dc.subjectCoverage Areaen_US
dc.titleA Coverage Area Estimation Model for Interference-Limited Non-Line-of-Sight Point-to-Multipoint Fixed Broadband Wireless Communication Systemsen_US
dc.typeThesisen_US
dc.contributor.departmentElectrical and Computer Engineeringen_US
dc.description.degreeMaster of Scienceen_US
thesis.degree.nameMaster of Scienceen_US
thesis.degree.levelmastersen_US
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen_US
thesis.degree.disciplineElectrical and Computer Engineeringen_US
dc.contributor.committeechairBostian, Charles W.en_US
dc.contributor.committeememberMidkiff, Scott F.en_US
dc.contributor.committeememberSweeney, Dennis G.en_US
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-10032002-113335/en_US
dc.date.sdate2002-10-03en_US
dc.date.rdate2003-10-04
dc.date.adate2002-10-04en_US


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record