File Download
  Links for fulltext
     (May Require Subscription)
Supplementary

Article: Effects of carrier frequency accuracy on quasi-synchronous, multicarrier DS-CDMA communications using optimized sequences

TitleEffects of carrier frequency accuracy on quasi-synchronous, multicarrier DS-CDMA communications using optimized sequences
Authors
KeywordsCarrier frequency offset (CFO)
multicarrier direct signal code division multiple access (DS-CDMA)
quasisynchronous (QS) transmission
Issue Date1999
PublisherIEEE.
Citation
Ieee Journal On Selected Areas In Communications, 1999, v. 17 n. 11, p. 1915-1923 How to Cite?
AbstractIt is known that the multiple access interference (MAI) of a quasi-synchronous (QS) multicarrier direct signal code division multiple access (DS-CDMA) system can be substantially reduced by using signature sequences having optimized cross correlation at small shifts around the origin. This paper shows that the time-frequency cross correlation function rather than the usual (time-domain) cross correlation determines the MAI when the system is operated in the presence of carrier frequency offset (CFO), which arises due to the frequency-accuracy limit of the oscillator. Several known sets of sequences having optimized time-domain cross correlation are investigated for their MAI-minimization capabilities in the presence of CFO. It is found that: i) a system using Walsh codes or Suehiro-Hatori polyphase sequences can be driven into outage 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. Implications of these findings to practical implementation of systems are discussed.
Persistent Identifierhttp://hdl.handle.net/10722/44851
ISSN
2015 Impact Factor: 3.672
2015 SCImago Journal Rankings: 2.915
References

 

DC FieldValueLanguage
dc.contributor.authorYip, KWen_HK
dc.contributor.authorNg, TSen_HK
dc.date.accessioned2007-10-30T06:11:37Z-
dc.date.available2007-10-30T06:11:37Z-
dc.date.issued1999en_HK
dc.identifier.citationIeee Journal On Selected Areas In Communications, 1999, v. 17 n. 11, p. 1915-1923en_HK
dc.identifier.issn0733-8716en_HK
dc.identifier.urihttp://hdl.handle.net/10722/44851-
dc.description.abstractIt is known that the multiple access interference (MAI) of a quasi-synchronous (QS) multicarrier direct signal code division multiple access (DS-CDMA) system can be substantially reduced by using signature sequences having optimized cross correlation at small shifts around the origin. This paper shows that the time-frequency cross correlation function rather than the usual (time-domain) cross correlation determines the MAI when the system is operated in the presence of carrier frequency offset (CFO), which arises due to the frequency-accuracy limit of the oscillator. Several known sets of sequences having optimized time-domain cross correlation are investigated for their MAI-minimization capabilities in the presence of CFO. It is found that: i) a system using Walsh codes or Suehiro-Hatori polyphase sequences can be driven into outage 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. Implications of these findings to practical implementation of systems are discussed.en_HK
dc.format.extent338301 bytes-
dc.format.extent21012 bytes-
dc.format.extent21377 bytes-
dc.format.mimetypeapplication/pdf-
dc.format.mimetypetext/plain-
dc.format.mimetypetext/plain-
dc.languageengen_HK
dc.publisherIEEE.en_HK
dc.relation.ispartofIEEE Journal on Selected Areas in Communicationsen_HK
dc.rightsCreative Commons: Attribution 3.0 Hong Kong License-
dc.rights©1999 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.subjectCarrier frequency offset (CFO)en_HK
dc.subjectmulticarrier direct signal code division multiple access (DS-CDMA)en_HK
dc.subjectquasisynchronous (QS) transmissionen_HK
dc.titleEffects of carrier frequency accuracy on quasi-synchronous, multicarrier DS-CDMA communications using optimized sequencesen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0733-8716&volume=17&issue=11&spage=1915&epage=1923&date=1999&atitle=Effects+of+carrier+frequency+accuracy+on+quasi-synchronous,+multicarrier+DS-CDMA+communications+using+optimized+sequencesen_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.doi10.1109/49.806821en_HK
dc.identifier.scopuseid_2-s2.0-0033325631en_HK
dc.identifier.hkuros52548-
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-0033325631&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume17en_HK
dc.identifier.issue11en_HK
dc.identifier.spage1915en_HK
dc.identifier.epage1923en_HK
dc.publisher.placeUnited Statesen_HK
dc.identifier.scopusauthoridYip, KW=7101909909en_HK
dc.identifier.scopusauthoridNg, TS=7402229975en_HK

Export via OAI-PMH Interface in XML Formats


OR


Export to Other Non-XML Formats