Fundamental limits on time delay estimation in dispersed spectrum cognitive radio systems

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buir.contributor.authorGezici, Sinan
dc.citation.epage83en_US
dc.citation.issueNumber1en_US
dc.citation.spage78en_US
dc.citation.volumeNumber8en_US
dc.contributor.authorGezici, Sinanen_US
dc.contributor.authorCelebi, H.en_US
dc.contributor.authorPoor, H. V.en_US
dc.contributor.authorArslan, H.en_US
dc.date.accessioned2016-02-08T10:05:57Z
dc.date.available2016-02-08T10:05:57Z
dc.date.issued2009en_US
dc.departmentDepartment of Electrical and Electronics Engineeringen_US
dc.description.abstractIn this paper, fundamental limits on time delay estimation are studied for cognitive radio systems, which facilitate opportunistic use of spectral resources. First, a generic Cramer-Rao lower bound (CRLB) expression is obtained in the case of unknown channel coefficients and carrier-frequency offsets (CFOs) for cognitive radio systems with dispersed spectrum utilization. Then, various modulation schemes are considered, and the effects of unknown channel coefficients and CFOs on the accuracy of time delay estimation are quantified. Finally, numerical studies are performed in order to verify the theoretical analysis.en_US
dc.description.provenanceMade available in DSpace on 2016-02-08T10:05:57Z (GMT). No. of bitstreams: 1 bilkent-research-paper.pdf: 70227 bytes, checksum: 26e812c6f5156f83f0e77b261a471b5a (MD5) Previous issue date: 2009en
dc.description.sponsorshipEuropean Commission (EC)en_US
dc.identifier.doi10.1109/T-WC.2009.080104en_US
dc.identifier.issn1536-1276
dc.identifier.urihttp://hdl.handle.net/11693/22878
dc.language.isoEnglishen_US
dc.publisherIEEEen_US
dc.relation.isversionofhttp://dx.doi.org/10.1109/T-WC.2009.080104en_US
dc.source.titleIEEE Transactions on Wireless Communicationsen_US
dc.subjectCarrier frequency offset (CFO)en_US
dc.subjectCognitive radioen_US
dc.subjectCramer-Rao lower bound (CRLB)en_US
dc.subjectDispersed spectrum utilizationen_US
dc.subjectTime delay estimationen_US
dc.titleFundamental limits on time delay estimation in dispersed spectrum cognitive radio systemsen_US
dc.typeArticleen_US

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