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Conference Paper: Performance sensitivity of quasi-synchronous, multicarrier DS-CDMA systems due to carrier frequency disturbance

TitlePerformance sensitivity of quasi-synchronous, multicarrier DS-CDMA systems due to carrier frequency disturbance
Authors
Issue Date1998
PublisherIEEE.
Citation
International Conference On Communication Technology Proceedings, Icct, 1998, v. 2, p. S32021-S32025 How to Cite?
AbstractThe multiple access interference (MAI) of a quasi-synchronous, multicarrier DS-CDMA system can be substantially reduced by using sequences having low crosscorrelation at small shifts around the origin. This paper shows that the time-frequency crosscorrelation rather than the usual (time-domain) crosscorrelation determines the MAI when the system is operated in the presence of carrier frequency offset (CFO) which arises due to frequency-accuracy limit of the oscillator. Analysis on the time-frequency crosscorrelation properties reveals that (i) a system using Walsh codes or Suehiro-Hatori polyphase sequences can be driven into outage in the presence of CFO as a result of significant worst-case MAI, and (ii) it is possible to minimize the MAI for systems using preferentially phased Gold codes, cyclic-shift m-sequences or Lin-Chang sequences only if the product of chip period and maximum frequency deviation is less than around 0.01.
Persistent Identifierhttp://hdl.handle.net/10722/46194
References

 

DC FieldValueLanguage
dc.contributor.authorYip, KWen_HK
dc.contributor.authorNg, TSen_HK
dc.date.accessioned2007-10-30T06:44:31Z-
dc.date.available2007-10-30T06:44:31Z-
dc.date.issued1998en_HK
dc.identifier.citationInternational Conference On Communication Technology Proceedings, Icct, 1998, v. 2, p. S32021-S32025en_HK
dc.identifier.urihttp://hdl.handle.net/10722/46194-
dc.description.abstractThe multiple access interference (MAI) of a quasi-synchronous, multicarrier DS-CDMA system can be substantially reduced by using sequences having low crosscorrelation at small shifts around the origin. This paper shows that the time-frequency crosscorrelation rather than the usual (time-domain) crosscorrelation determines the MAI when the system is operated in the presence of carrier frequency offset (CFO) which arises due to frequency-accuracy limit of the oscillator. Analysis on the time-frequency crosscorrelation properties reveals that (i) a system using Walsh codes or Suehiro-Hatori polyphase sequences can be driven into outage in the presence of CFO as a result of significant worst-case MAI, and (ii) it is possible to minimize the MAI for systems using preferentially phased Gold codes, cyclic-shift m-sequences or Lin-Chang sequences only if the product of chip period and maximum frequency deviation is less than around 0.01.en_HK
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dc.languageengen_HK
dc.publisherIEEE.en_HK
dc.relation.ispartofInternational Conference on Communication Technology Proceedings, ICCTen_HK
dc.rightsCreative Commons: Attribution 3.0 Hong Kong License-
dc.rights©1998 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.en_HK
dc.titlePerformance sensitivity of quasi-synchronous, multicarrier DS-CDMA systems due to carrier frequency disturbanceen_HK
dc.typeConference_Paperen_HK
dc.identifier.emailNg, TS:tsng@eee.hku.hken_HK
dc.identifier.authorityNg, TS=rp00159en_HK
dc.description.naturepublished_or_final_versionen_HK
dc.identifier.scopuseid_2-s2.0-1642585896en_HK
dc.identifier.hkuros52710-
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-1642585896&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume2en_HK
dc.identifier.spageS32021en_HK
dc.identifier.epageS32025en_HK
dc.identifier.scopusauthoridYip, KW=7101909909en_HK
dc.identifier.scopusauthoridNg, TS=7402229975en_HK

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