File Download
  Links for fulltext
     (May Require Subscription)
Supplementary

Article: Downlink transmission of broadband OFCDM systems - Part I: Hybrid detection

TitleDownlink transmission of broadband OFCDM systems - Part I: Hybrid detection
Authors
KeywordsChannel estimation
Correlated fading channels
Interference cancellation
MMSE detection
Multicarrier CDMA
OFDM
Two-dimensional spreading
Issue Date2005
PublisherI E E E. The Journal's web site is located at http://ieeexplore.ieee.org/xpl/RecentIssue.jsp?punumber=26
Citation
Ieee Transactions On Communications, 2005, v. 53 n. 4, p. 718-729 How to Cite?
AbstractThe broadband orthogonal frequency and code division multiplexing (OFCDM) system with two-dimensional spreading (time and frequency domain spreading) is becoming a very attractive technique for high-rate data transmission in future wireless communication systems. In this paper, a quasianalytical study is presented on the downlink performance of the OFCDM system with hybrid multi-code interference (MCI) cancellation and minimum mean square error (MMSE) detection. The weights of MMSE are derived and updated stage by stage of MCI cancellation. The effects of channel estimation errors and sub-carrier correlation are also studied. It is shown that the hybrid detection scheme performs much better than pure MMSE when good channel estimation is guaranteed. The power ratio between the pilot channel and all data channels should be set to 0.25, which is a near optimum value for the two-dimensional spreading system with time domain spreading factor (NT) of 4 and 8. On the other hand, in a slow fading channel, a large value of the channel estimation window size γNT, where γ is an odd integer, is expected. However, γ = 3 is large enough for the system with NT = 8 while γ = 5 is more desirable for the system with NT = 4. Although performance of the hybrid detection degrades in the presence of the sub-carrier correlation, the hybrid detection still works well even the correlation coefficient is as high as 0.7. Finally, given NT, although performance improves when the frequency domain spreading factor (NF) increases, the frequency diversity gain is almost saturated for a large value of NF (i.e., NF ≥ 32). © 2005 IEEE.
Persistent Identifierhttp://hdl.handle.net/10722/42712
ISSN
2015 Impact Factor: 2.298
2015 SCImago Journal Rankings: 1.659
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorZhou, Yen_HK
dc.contributor.authorWang, Jen_HK
dc.contributor.authorSawahashi, Men_HK
dc.date.accessioned2007-03-23T04:30:40Z-
dc.date.available2007-03-23T04:30:40Z-
dc.date.issued2005en_HK
dc.identifier.citationIeee Transactions On Communications, 2005, v. 53 n. 4, p. 718-729en_HK
dc.identifier.issn0090-6778en_HK
dc.identifier.urihttp://hdl.handle.net/10722/42712-
dc.description.abstractThe broadband orthogonal frequency and code division multiplexing (OFCDM) system with two-dimensional spreading (time and frequency domain spreading) is becoming a very attractive technique for high-rate data transmission in future wireless communication systems. In this paper, a quasianalytical study is presented on the downlink performance of the OFCDM system with hybrid multi-code interference (MCI) cancellation and minimum mean square error (MMSE) detection. The weights of MMSE are derived and updated stage by stage of MCI cancellation. The effects of channel estimation errors and sub-carrier correlation are also studied. It is shown that the hybrid detection scheme performs much better than pure MMSE when good channel estimation is guaranteed. The power ratio between the pilot channel and all data channels should be set to 0.25, which is a near optimum value for the two-dimensional spreading system with time domain spreading factor (NT) of 4 and 8. On the other hand, in a slow fading channel, a large value of the channel estimation window size γNT, where γ is an odd integer, is expected. However, γ = 3 is large enough for the system with NT = 8 while γ = 5 is more desirable for the system with NT = 4. Although performance of the hybrid detection degrades in the presence of the sub-carrier correlation, the hybrid detection still works well even the correlation coefficient is as high as 0.7. Finally, given NT, although performance improves when the frequency domain spreading factor (NF) increases, the frequency diversity gain is almost saturated for a large value of NF (i.e., NF ≥ 32). © 2005 IEEE.en_HK
dc.format.extent612131 bytes-
dc.format.extent25600 bytes-
dc.format.mimetypeapplication/pdf-
dc.format.mimetypeapplication/msword-
dc.languageengen_HK
dc.publisherI E E E. The Journal's web site is located at http://ieeexplore.ieee.org/xpl/RecentIssue.jsp?punumber=26en_HK
dc.relation.ispartofIEEE Transactions on Communicationsen_HK
dc.rightsCreative Commons: Attribution 3.0 Hong Kong License-
dc.rights©2005 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.subjectChannel estimationen_HK
dc.subjectCorrelated fading channelsen_HK
dc.subjectInterference cancellationen_HK
dc.subjectMMSE detectionen_HK
dc.subjectMulticarrier CDMAen_HK
dc.subjectOFDMen_HK
dc.subjectTwo-dimensional spreadingen_HK
dc.titleDownlink transmission of broadband OFCDM systems - Part I: Hybrid detectionen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0090-6778&volume=53&issue=4&spage=718&epage=729&date=2005&atitle=Downlink+transmission+of+broadband+OFCDM+Systems-part+I:+hybrid+detectionen_HK
dc.identifier.emailZhou, Y:yqzhou@eee.hku.hken_HK
dc.identifier.authorityZhou, Y=rp00214en_HK
dc.description.naturepublished_or_final_versionen_HK
dc.identifier.doi10.1109/TCOMM.2005.844962en_HK
dc.identifier.scopuseid_2-s2.0-19644362263en_HK
dc.identifier.hkuros108401-
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-19644362263&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume53en_HK
dc.identifier.issue4en_HK
dc.identifier.spage718en_HK
dc.identifier.epage729en_HK
dc.identifier.isiWOS:000228940000022-
dc.publisher.placeUnited Statesen_HK
dc.identifier.scopusauthoridZhou, Y=7405367062en_HK
dc.identifier.scopusauthoridWang, J=11439898400en_HK
dc.identifier.scopusauthoridSawahashi, M=7005152759en_HK

Export via OAI-PMH Interface in XML Formats


OR


Export to Other Non-XML Formats