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dc.contributor.authorYu, Byungwanen_US
dc.date.accessioned2014-03-14T20:44:41Z
dc.date.available2014-03-14T20:44:41Z
dc.date.issued2003-08-25en_US
dc.identifier.otheretd-09032003-232435en_US
dc.identifier.urihttp://hdl.handle.net/10919/34904
dc.description.abstractA DS-CDMA system with QPSK modulation and a RAKE receiver is modeled and simulated. A mathematical description of the DS-CDMA system is provided on uplink and downlink. For a multipath channel environment, modeling techniques for AWGN and Rayleigh fading are illustrated. Comparisons are made concerning the performance of CDMA systems with hybrid data rates. The thesis proposes a technique for hybrid channel coding for ARQ (Automatic-Repeat-reQuest) protocol and FEC (Forward Error Correction) scheme that can reduce the error rate significantly. Each of ARQ protocol and FEC scheme gives rise to long latency and significant complexity, respectively, for obtaining the required QoS (Quality of Service). This thesis shows using theoretical analysis and computer simulations that synergistic effects are possible by using both an ARQ protocol and a FEC scheme.en_US
dc.publisherVirginia Techen_US
dc.relation.haspartThesis_BWYu.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.subjectWCDMAen_US
dc.subjectARQen_US
dc.subjecterror-sensitiveen_US
dc.subjectFECen_US
dc.subjecthybriden_US
dc.subjectBCHen_US
dc.subjectconvolutionalen_US
dc.titleHybrid Channel Coding for Error-Sensitive Class on DS-CDMA Air Interfaceen_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.committeechairWoerner, Brian D.en_US
dc.contributor.committeememberBuehrer, Richard Michaelen_US
dc.contributor.committeememberReed, Jeffrey Hughen_US
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-09032003-232435/en_US
dc.date.sdate2003-09-03en_US
dc.date.rdate2003-09-08
dc.date.adate2003-09-08en_US


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