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Article: Analysis of pilot-assisted channel estimators for OFDM systems with transmit diversity

TitleAnalysis of pilot-assisted channel estimators for OFDM systems with transmit diversity
Authors
KeywordsChannel estimation
Leakage effect
OFDM
Pilot sequence
Space time coding
Issue Date2006
PublisherIEEE.
Citation
Ieee Transactions On Broadcasting, 2006, v. 52 n. 2, p. 193-202 How to Cite?
AbstractIn this paper, we analyze the performance of pilot-assisted least square (LS) and minimum mean squared error (MMSE) channel estimators for orthogonal frequency division multiplexing (OFDM) systems with transmit antenna diversity. We first provide a design of orthogonal pilot sequences to simplify the estimators. We then analyze the mean squared error (MSE) performance, and study the leakage effect. When a channel tap is not sample-spaced, our analysis shows that the power of the channel tap will leak to not only other taps of the same antenna, but also taps belonging to other antennas. The leakage across antennas is mainly determined by the phase separation between pilot sequences, which is further related to the ratio between the number of pilots and number of antennas. We demonstrate that the MSE performance can be improved if more pilots are used, or fewer channels are estimated simultaneously. © 2006 IEEE.
Persistent Identifierhttp://hdl.handle.net/10722/44756
ISSN
2015 Impact Factor: 2.381
2015 SCImago Journal Rankings: 1.114
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorShen, Den_HK
dc.contributor.authorDiao, Zen_HK
dc.contributor.authorWong, KKen_HK
dc.contributor.authorLi, VOKen_HK
dc.date.accessioned2007-10-30T06:09:32Z-
dc.date.available2007-10-30T06:09:32Z-
dc.date.issued2006en_HK
dc.identifier.citationIeee Transactions On Broadcasting, 2006, v. 52 n. 2, p. 193-202en_HK
dc.identifier.issn0018-9316en_HK
dc.identifier.urihttp://hdl.handle.net/10722/44756-
dc.description.abstractIn this paper, we analyze the performance of pilot-assisted least square (LS) and minimum mean squared error (MMSE) channel estimators for orthogonal frequency division multiplexing (OFDM) systems with transmit antenna diversity. We first provide a design of orthogonal pilot sequences to simplify the estimators. We then analyze the mean squared error (MSE) performance, and study the leakage effect. When a channel tap is not sample-spaced, our analysis shows that the power of the channel tap will leak to not only other taps of the same antenna, but also taps belonging to other antennas. The leakage across antennas is mainly determined by the phase separation between pilot sequences, which is further related to the ratio between the number of pilots and number of antennas. We demonstrate that the MSE performance can be improved if more pilots are used, or fewer channels are estimated simultaneously. © 2006 IEEE.en_HK
dc.format.extent777273 bytes-
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dc.format.extent5489 bytes-
dc.format.mimetypeapplication/pdf-
dc.format.mimetypeapplication/pdf-
dc.format.mimetypetext/plain-
dc.format.mimetypetext/plain-
dc.languageengen_HK
dc.publisherIEEE.en_HK
dc.relation.ispartofIEEE Transactions on Broadcastingen_HK
dc.rightsCreative Commons: Attribution 3.0 Hong Kong License-
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.subjectChannel estimationen_HK
dc.subjectLeakage effecten_HK
dc.subjectOFDMen_HK
dc.subjectPilot sequenceen_HK
dc.subjectSpace time codingen_HK
dc.titleAnalysis of pilot-assisted channel estimators for OFDM systems with transmit diversityen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0018-9316&volume=52&issue=2&spage=193&epage=202&date=2006&atitle=Analysis+of+pilot-assisted+channel+estimators+for+OFDM+systems+with+transmit+diversityen_HK
dc.identifier.emailLi, VOK:vli@eee.hku.hken_HK
dc.identifier.authorityLi, VOK=rp00150en_HK
dc.description.naturepublished_or_final_versionen_HK
dc.identifier.doi10.1109/TBC.2005.854172en_HK
dc.identifier.scopuseid_2-s2.0-33644651323en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-33644651323&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume52en_HK
dc.identifier.issue2en_HK
dc.identifier.spage193en_HK
dc.identifier.epage202en_HK
dc.identifier.isiWOS:000237956200009-
dc.publisher.placeUnited Statesen_HK
dc.identifier.scopusauthoridShen, D=7401738166en_HK
dc.identifier.scopusauthoridDiao, Z=8415199800en_HK
dc.identifier.scopusauthoridWong, KK=7404759940en_HK
dc.identifier.scopusauthoridLi, VOK=7202621685en_HK

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