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Article: Downlink transmission of broadband OFCDM systems - Part II: Effect of doppler shift

TitleDownlink transmission of broadband OFCDM systems - Part II: Effect of doppler shift
Authors
Keywords2-D spreading
Channel estimation
Doppler shift
Fading channels
Interference cancellation
Minimum mean-square error (MMSE) detection
Multicarrier transmission
Orthogonal frequency-division multiplexing (OFDM)
Issue Date2006
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, 2006, v. 54 n. 6, p. 1097-1107 How to Cite?
AbstractThe orthogonal frequency and code division multiplexing (OFCDM) system with 2-D spreading (time- and frequency-domain spreading) is becoming a promising candidate for future broadband wireless communication systems. OFCDM is more attractive than orthogonal frequency-division multiplexing (OFDM) both by introducing frequency-domain spreading for frequency diversity provision and time-domain spreading for flexible data rate provision. To provide high-speed mobile services, multitude transmission is employed in conjunction with OFCDM. In a Gaussian or flat-fading channel, multicode channels are orthogonal. However, in a realistic wireless channel, the orthogonality no longer maintains. Thus, multicode interference (MCI) is caused. This paper focuses on the investigation of the effect of Doppler shift on the downlink transmission of high-speed mobile OFCDM systems. A practical channel estimation algorithm based on a code-multiplexed pilot channel is employed to track the variations of fading channels. Hybrid MCI cancellation and minimum mean-square error (MMSE) detection proposed by the authors is employed as an efficient way to eliminate the MCI in the frequency domain. The system performance is analytically studied with imperfect channel estimation to show how it is affected by parameters such as the window size in the channel estimation, Doppler shift, the number of stages of the hybrid detection, the power ratio of pilot to data channels, spreading factor, and so on. © 2006 IEEE.
Persistent Identifierhttp://hdl.handle.net/10722/44771
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.accessioned2007-10-30T06:09:52Z-
dc.date.available2007-10-30T06:09:52Z-
dc.date.issued2006en_HK
dc.identifier.citationIeee Transactions On Communications, 2006, v. 54 n. 6, p. 1097-1107en_HK
dc.identifier.issn0090-6778en_HK
dc.identifier.urihttp://hdl.handle.net/10722/44771-
dc.description.abstractThe orthogonal frequency and code division multiplexing (OFCDM) system with 2-D spreading (time- and frequency-domain spreading) is becoming a promising candidate for future broadband wireless communication systems. OFCDM is more attractive than orthogonal frequency-division multiplexing (OFDM) both by introducing frequency-domain spreading for frequency diversity provision and time-domain spreading for flexible data rate provision. To provide high-speed mobile services, multitude transmission is employed in conjunction with OFCDM. In a Gaussian or flat-fading channel, multicode channels are orthogonal. However, in a realistic wireless channel, the orthogonality no longer maintains. Thus, multicode interference (MCI) is caused. This paper focuses on the investigation of the effect of Doppler shift on the downlink transmission of high-speed mobile OFCDM systems. A practical channel estimation algorithm based on a code-multiplexed pilot channel is employed to track the variations of fading channels. Hybrid MCI cancellation and minimum mean-square error (MMSE) detection proposed by the authors is employed as an efficient way to eliminate the MCI in the frequency domain. The system performance is analytically studied with imperfect channel estimation to show how it is affected by parameters such as the window size in the channel estimation, Doppler shift, the number of stages of the hybrid detection, the power ratio of pilot to data channels, spreading factor, and so on. © 2006 IEEE.en_HK
dc.format.extent649014 bytes-
dc.format.extent1999 bytes-
dc.format.extent2319 bytes-
dc.format.mimetypeapplication/pdf-
dc.format.mimetypetext/plain-
dc.format.mimetypetext/plain-
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.rights©2006 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.rightsCreative Commons: Attribution 3.0 Hong Kong License-
dc.subject2-D spreadingen_HK
dc.subjectChannel estimationen_HK
dc.subjectDoppler shiften_HK
dc.subjectFading channelsen_HK
dc.subjectInterference cancellationen_HK
dc.subjectMinimum mean-square error (MMSE) detectionen_HK
dc.subjectMulticarrier transmissionen_HK
dc.subjectOrthogonal frequency-division multiplexing (OFDM)en_HK
dc.titleDownlink transmission of broadband OFCDM systems - Part II: Effect of doppler shiften_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0090-6778&volume=54&issue=6&spage=1097&epage=1108&date=2006&atitle=Downlink+transmission+of+broadband+OFCDM+Systems-part+II:+effect+of+Doppler+shiften_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.2006.876872en_HK
dc.identifier.scopuseid_2-s2.0-33947112344en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-33947112344&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume54en_HK
dc.identifier.issue6en_HK
dc.identifier.spage1097en_HK
dc.identifier.epage1107en_HK
dc.identifier.isiWOS:000238493300017-
dc.publisher.placeUnited Statesen_HK
dc.identifier.scopusauthoridZhou, Y=7405367062en_HK
dc.identifier.scopusauthoridWang, J=36026110700en_HK
dc.identifier.scopusauthoridSawahashi, M=7005152759en_HK
dc.identifier.citeulike2802564-

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