A comparison of two novel channel coding techniques for CDMA

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dc.contributor.authorKim, Young M.en
dc.contributor.committeechairWoerner, Brian D.en
dc.contributor.committeechairReed, Jeffrey H.en
dc.contributor.committeememberRappaport, Theodore S.en
dc.contributor.departmentElectrical Engineeringen
dc.date.accessioned2014-03-14T21:30:34Zen
dc.date.adate2009-03-03en
dc.date.available2014-03-14T21:30:34Zen
dc.date.issued1995-05-05en
dc.date.rdate2009-03-03en
dc.date.sdate2009-03-03en
dc.description.abstractIn Code Division Multiple Access (CDMA) systems forward error correction (FEC) is an important factor in improving system performance. Because of the multiple access interference observed in asynchronous CDMA, FEC is required to improve system capacity. Several alternative coding techniques are available, including "trellis codes" specifically designed for CDMA, very low rate convolutional codes and conventional convolutional codes. An analytic approach is developed to compare the performance of different coding techniques for CDMA on the same basis by extending several improved analysis techniques which were developed for uncoded CDMA. Analytic results are presented for additive white Gaussian noise (AWGN) channels and frequency non-selective Rician Fading (FNRF) channels. The performance of coded CDMA systems in frequency selective Rayleigh fading channels is also analyzed using simulation techniques. Both analytic and simulation results show that by using trellis codes or very low rate convolutional codes significant performance improvement is achieved over conventional convolutional codes. Trellis codes outperform very low rate convolutional codes in AWGN and FNRF channels while both codes show similar performance in frequency selective Rayleigh fading channels.en
dc.description.degreeMaster of Scienceen
dc.format.extentviii, 127 leavesen
dc.format.mediumBTDen
dc.format.mimetypeapplication/pdfen
dc.identifier.otheretd-03032009-040554en
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-03032009-040554/en
dc.identifier.urihttp://hdl.handle.net/10919/41355en
dc.language.isoenen
dc.publisherVirginia Techen
dc.relation.haspartLD5655.V855_1995.K56.pdfen
dc.relation.isformatofOCLC# 34408923en
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subjectspread spectrumen
dc.subjectmobile radio communicationsen
dc.subjecttrellis codingen
dc.subject.lccLD5655.V855 1995.K56en
dc.titleA comparison of two novel channel coding techniques for CDMAen
dc.typeThesisen
dc.type.dcmitypeTexten
thesis.degree.disciplineElectrical Engineeringen
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen
thesis.degree.levelmastersen
thesis.degree.nameMaster of Scienceen

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