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Conference Paper: Periodogram-based carrier frequency offset estimation for orthogonal frequency division multiplexing applications

TitlePeriodogram-based carrier frequency offset estimation for orthogonal frequency division multiplexing applications
Authors
KeywordsCommunications
Issue Date2001
PublisherIEEE. The Journal's web site is located at http://ieeexplore.ieee.org/xpl/conhome.jsp?punumber=1000308
Citation
Conference Record / Ieee Global Telecommunications Conference, 2001, v. 5, p. 3070-3074 How to Cite?
AbstractIn this paper, a novel carrier frequency offset (CFO) estimation algorithm is proposed for OFDM applications. The maximum likelihood estimator (MLE) for the CFO is derived, which reveals the relationship between the CFO and the periodogram of the received signal. Theoretical analysis shows that the proposed MLE is statistically efficient. To realize this MLE in practice, a sub-optimal estimator is also introduced in which zero-padded FFT is invoked for implementation. For the objectives of reducing the implementation complexity and broadening the estimation range, a preamble structure comprising nonuniformly-spaced pilot tones is presented. Based on this preamble, the CFO estimation is split into two phases: the coarse estimation is obtained through the correlation between the received spectrum and the original pattern of the preamble; whereas the fine estimation is obtained by comparing the relative magnitude attenuation in the vicinities of those CFO-shifted pilot tones. Both analytical investigations and computer simulations indicate that the accuracy of this simplified sub-optimal estimator is proportional to the oversize ratio of zero-padded FFT, and its estimation range is equal to the bandwidth of OFDM signal. When the oversize ratio is sufficiently high, the performance of the proposed sub-optimal estimator approaches that of the proposed MLE.
Persistent Identifierhttp://hdl.handle.net/10722/46319
ISSN
References

 

DC FieldValueLanguage
dc.contributor.authorLei, Jen_HK
dc.contributor.authorNg, TSen_HK
dc.date.accessioned2007-10-30T06:47:15Z-
dc.date.available2007-10-30T06:47:15Z-
dc.date.issued2001en_HK
dc.identifier.citationConference Record / Ieee Global Telecommunications Conference, 2001, v. 5, p. 3070-3074en_HK
dc.identifier.issn1054-5921en_HK
dc.identifier.urihttp://hdl.handle.net/10722/46319-
dc.description.abstractIn this paper, a novel carrier frequency offset (CFO) estimation algorithm is proposed for OFDM applications. The maximum likelihood estimator (MLE) for the CFO is derived, which reveals the relationship between the CFO and the periodogram of the received signal. Theoretical analysis shows that the proposed MLE is statistically efficient. To realize this MLE in practice, a sub-optimal estimator is also introduced in which zero-padded FFT is invoked for implementation. For the objectives of reducing the implementation complexity and broadening the estimation range, a preamble structure comprising nonuniformly-spaced pilot tones is presented. Based on this preamble, the CFO estimation is split into two phases: the coarse estimation is obtained through the correlation between the received spectrum and the original pattern of the preamble; whereas the fine estimation is obtained by comparing the relative magnitude attenuation in the vicinities of those CFO-shifted pilot tones. Both analytical investigations and computer simulations indicate that the accuracy of this simplified sub-optimal estimator is proportional to the oversize ratio of zero-padded FFT, and its estimation range is equal to the bandwidth of OFDM signal. When the oversize ratio is sufficiently high, the performance of the proposed sub-optimal estimator approaches that of the proposed MLE.en_HK
dc.format.extent85832 bytes-
dc.format.extent21012 bytes-
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dc.format.mimetypetext/plain-
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dc.languageengen_HK
dc.publisherIEEE. The Journal's web site is located at http://ieeexplore.ieee.org/xpl/conhome.jsp?punumber=1000308en_HK
dc.relation.ispartofConference Record / IEEE Global Telecommunications Conferenceen_HK
dc.rightsCreative Commons: Attribution 3.0 Hong Kong License-
dc.rights©2001 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.subjectCommunicationsen_HK
dc.titlePeriodogram-based carrier frequency offset estimation for orthogonal frequency division multiplexing applicationsen_HK
dc.typeConference_Paperen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=1054-5921&volume=5&spage=3070&epage=3074&date=2001&atitle=Periodogram-based+carrier+frequency+offset+estimation+for+orthogonal+frequency+division+multiplexing+applicationsen_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/GLOCOM.2001.965991en_HK
dc.identifier.scopuseid_2-s2.0-0035688460en_HK
dc.identifier.hkuros72056-
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-0035688460&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume5en_HK
dc.identifier.spage3070en_HK
dc.identifier.epage3074en_HK
dc.identifier.scopusauthoridLei, J=55254291400en_HK
dc.identifier.scopusauthoridNg, TS=7402229975en_HK

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