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dc.contributor.authorIlunga, Louen_US
dc.date.accessioned2014-03-14T20:43:34Z
dc.date.available2014-03-14T20:43:34Z
dc.date.issued2005-06-30en_US
dc.identifier.otheretd-08162005-101502en_US
dc.identifier.urihttp://hdl.handle.net/10919/34578
dc.description.abstractWireless technologies, such as satellite, cellular, and wireless internet are now commercially driven by ever more demanding consumers, who are ready for seamless integration of communication networks from the home to the car, and into the office. There is a growing need to quickly transmit information wirelessly and accurately. Engineers have already combine techniques such as orthogonal frequency division multiplexing (OFDM) suitable for high data rate transmission with forward error correction (FEC) methods over wireless channels.

In this thesis, we enhance the system throughput of a working OFDM system by adding turbo coding and adaptive modulation (AD). Simulation is done over a time varying, frequency selective Rayleigh fading channel. The temporal variations in the simulated wireless channel are due to the presence of Doppler, a sign of relative motion between transmitter and receiver. The wideband system has 48 data sub-channels, each is individually modulated according to channel state information acquired during the previous burst. The end goal is to increase the system throughput while maintaining system performance under a bit error rate (BER) of 10-2. The results we obtained are preliminary. The lack of resources prevented us from producing detailed graphs of our findings.

en_US
dc.publisherVirginia Techen_US
dc.relation.haspartETDF.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.subjectdoppleren_US
dc.subjectfrequency selective rayleigh channelen_US
dc.subjectadaptive modulationen_US
dc.subjectturbo codesen_US
dc.subjectorthogonal frequency division multiplexingen_US
dc.subjecttarget BERen_US
dc.titleAdaptive, Turbo-coded OFDMen_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.committeechairAnnamalai, Annamalai Jr.en_US
dc.contributor.committeememberJacobs, Iraen_US
dc.contributor.committeememberReed, Jeffrey Hughen_US
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-08162005-101502/en_US
dc.date.sdate2005-08-16en_US
dc.date.rdate2005-09-15
dc.date.adate2005-09-15en_US


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