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Conference Paper: Pilot-tone-based maximum likelihood estimator for carrier frequency offset in OFDM systems

TitlePilot-tone-based maximum likelihood estimator for carrier frequency offset in OFDM systems
Authors
Issue Date2003
Citation
Ieee International Conference On Communications, 2003, v. 3, p. 2046-2050 How to Cite?
AbstractIn this paper, a pilot-tone-based maximum likelihood estimator (PTB-MLE) for carrier frequency offset (CFO) in Orthogonal Frequency Division Multiplexing (OFDM) systems is proposed. To obtain consistent estimate of the CFO over frequency-selective fading channels, the proposed method employs a preamble comprising distinctively-spaced pilot tones. As a result of this preamble configuration, a large estimation range equal to the bandwidth of OFDM signal can be achieved. Different from previous PTB estimators that are ad hoc, the PTB-MLE exploits the relationship between the CFO and the periodogram of the preamble. To realize this PTB-MLE in practice, a sub-optimal estimator based on zero-padded FFT is introduced as well. When the oversize ratio is sufficiently high, the sub-optimal estimator is asymptotically unbiased and its variance approaches the CRB.
Persistent Identifierhttp://hdl.handle.net/10722/98952
ISSN
References

 

DC FieldValueLanguage
dc.contributor.authorLei, Jen_HK
dc.contributor.authorNg, TSen_HK
dc.date.accessioned2010-09-25T18:09:28Z-
dc.date.available2010-09-25T18:09:28Z-
dc.date.issued2003en_HK
dc.identifier.citationIeee International Conference On Communications, 2003, v. 3, p. 2046-2050en_HK
dc.identifier.issn0536-1486en_HK
dc.identifier.urihttp://hdl.handle.net/10722/98952-
dc.description.abstractIn this paper, a pilot-tone-based maximum likelihood estimator (PTB-MLE) for carrier frequency offset (CFO) in Orthogonal Frequency Division Multiplexing (OFDM) systems is proposed. To obtain consistent estimate of the CFO over frequency-selective fading channels, the proposed method employs a preamble comprising distinctively-spaced pilot tones. As a result of this preamble configuration, a large estimation range equal to the bandwidth of OFDM signal can be achieved. Different from previous PTB estimators that are ad hoc, the PTB-MLE exploits the relationship between the CFO and the periodogram of the preamble. To realize this PTB-MLE in practice, a sub-optimal estimator based on zero-padded FFT is introduced as well. When the oversize ratio is sufficiently high, the sub-optimal estimator is asymptotically unbiased and its variance approaches the CRB.en_HK
dc.languageengen_HK
dc.relation.ispartofIEEE International Conference on Communicationsen_HK
dc.titlePilot-tone-based maximum likelihood estimator for carrier frequency offset in OFDM systemsen_HK
dc.typeConference_Paperen_HK
dc.identifier.emailNg, TS:tsng@eee.hku.hken_HK
dc.identifier.authorityNg, TS=rp00159en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.scopuseid_2-s2.0-0037632472en_HK
dc.identifier.hkuros81508en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-0037632472&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume3en_HK
dc.identifier.spage2046en_HK
dc.identifier.epage2050en_HK
dc.identifier.scopusauthoridLei, J=55254291400en_HK
dc.identifier.scopusauthoridNg, TS=7402229975en_HK

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