Time-Scale Domain Characterization of Time-Varying Ultrawideband Infostation Channel

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dc.contributor.authorChude-Okonkwo, Uche A. K.
dc.contributor.authorNgah, Razali
dc.contributor.authorLeow, Chee Y.
dc.contributor.authorAbd Rahaman, Tharek
dc.coverage.issue2cs
dc.coverage.volume21cs
dc.date.accessioned2015-01-22T11:09:06Zcs_CZ
dc.date.accessioned2015-01-22T13:48:48Z
dc.date.available2015-01-22T11:09:06Zcs_CZ
dc.date.available2015-01-22T13:48:48Z
dc.date.issued2012-06cs
dc.description.abstractThe time-scale domain geometrical-based method for the characterization of the time varying ultrawideband (UWB) channel typical of an infostation channel is presented. Compared to methods that use Doppler shift as a measure of time-variation in the channel this model provides a more reliable measure of frequency dispersion caused by terminal mobility in the UWB infostation channel. Particularly, it offers carrier frequency independent method of computing wideband channel responses and parameters which are important for ultrawideband systems. Results show that the frequency dispersion of the channel depends on the frequency and not on the choice of bandwidth. And time dispersion depends on bandwidth and not on the frequency. It is also shown that for time-varying UWB, frame length defined over the coherence time obtained with reference to the carrier frequency results in an error margin which can be reduced by using the coherence time defined with respect to the maximum frequency in a given frequency band. And the estimation of the frequency offset using the time-scale domain (wideband) model presented here (especially in the case of multiband UWB frequency synchronization) is more accurate than using frequency offset estimate obtained from narrowband models.en
dc.formattextcs
dc.format.extent694-703cs
dc.format.mimetypeapplication/pdfen
dc.identifier.citationRadioengineering. 2012, vol. 21, č. 2, s. 694-703. ISSN 1210-2512cs
dc.identifier.issn1210-2512cs_CZ
dc.identifier.urihttp://hdl.handle.net/11012/37112cs_CZ
dc.language.isoencs
dc.publisherSpolečnost pro radioelektronické inženýrstvícs
dc.relation.ispartofRadioengineeringcs
dc.relation.urihttp://www.radioeng.cz/fulltexts/2012/12_02_0694_0703.pdfcs
dc.rightsCreative Commons Attribution 3.0 Unported Licenseen
dc.rights.accessopenAccessen
dc.rights.urihttp://creativecommons.org/licenses/by/3.0/en
dc.subjectUltrawidebanden
dc.subjecttime-scaleen
dc.subjectgeometrical modelen
dc.subjecttime-varyingen
dc.subjectcoherence timeen
dc.subjectfrequency offseten
dc.titleTime-Scale Domain Characterization of Time-Varying Ultrawideband Infostation Channelen
dc.type.driverarticleen
dc.type.statusPeer-revieweden
dc.type.versionpublishedVersionen
eprints.affiliatedInstitution.facultyFakulta eletrotechniky a komunikačních technologiícs
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