Theoretical limits on time delay estimation for ultra-wideband cognitive radios

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buir.contributor.authorGezici, Sinan
dc.citation.epage180en_US
dc.citation.spage177en_US
dc.contributor.authorGezici, Sinanen_US
dc.contributor.authorCelebi, H.en_US
dc.contributor.authorArslan, H.en_US
dc.contributor.authorPoor, H. V.en_US
dc.coverage.spatialHannover, Germany
dc.date.accessioned2016-02-08T11:36:12Z
dc.date.available2016-02-08T11:36:12Z
dc.date.issued2008-09en_US
dc.departmentDepartment of Electrical and Electronics Engineeringen_US
dc.descriptionDate of Conference: 10-12 Sept. 2008
dc.descriptionConference name: 2008 IEEE International Conference on Ultra-Wideband
dc.description.abstractIn this paper, theoretical limits on time delay estimation are studied for ultra-wideband (UWB) cognitive radio systems. For a generic UWB spectrum with dispersed bands, the Cramer-Rao lower bound (CRLB) is derived for unknown channel coefficients and carrier-frequency offsets (CFOs). Then, the effects of unknown channel coefficients and CFOs are investigated for linearly and non-linearly modulated training signals by obtaining specific CRLB expressions. It is shown that for linear modulations with a constant envelope, the effects of the unknown parameters can be mitigated. Finally, numerical results, which support the theoretical analysis, are presented. © 2008 IEEE.en_US
dc.identifier.doi10.1109/ICUWB.2008.4653380en_US
dc.identifier.urihttp://hdl.handle.net/11693/26798
dc.language.isoEnglishen_US
dc.publisherIEEE
dc.relation.isversionofhttp://dx.doi.org/10.1109/ICUWB.2008.4653380en_US
dc.source.titleProceeedings of The 2008 IEEE International Conference on Ultra-Wideband, ICUWB 2008en_US
dc.subjectCarrier frequency offset (CFO)en_US
dc.subjectCramer-rao lower bound (CRLB)en_US
dc.subjectDispersed spectrum utilizationen_US
dc.subjectTime delay estimationen_US
dc.subjectUltra-wideband (UWB) cognitive radioen_US
dc.subjectCivil aviationen_US
dc.subjectCognitive systemsen_US
dc.subjectCommunication channels (information theory)en_US
dc.subjectControl theoryen_US
dc.subjectCramer-Rao boundsen_US
dc.subjectElectric network analysisen_US
dc.subjectFrequency allocationen_US
dc.subjectFrequency bandsen_US
dc.subjectFrequency estimationen_US
dc.subjectModulationen_US
dc.subjectRadioen_US
dc.subjectRadio systemsen_US
dc.subjectSensor networksen_US
dc.subjectTelecommunication systemsen_US
dc.subjectTime delayen_US
dc.subjectWireless telecommunication systemsen_US
dc.titleTheoretical limits on time delay estimation for ultra-wideband cognitive radiosen_US
dc.typeConference Paperen_US
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