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dc.contributor.authorKaradimas, Petrosen_GB
dc.contributor.authorKotsopoulos, Stavros A.en_GB
dc.date.accessioned2013-03-13T13:03:20Z
dc.date.available2013-03-13T13:03:20Z
dc.date.issued2009
dc.identifier.citationKaradimas, P., Kotsopoulos, S.A., (2009) 'The Weibull–Lognormal Fading Channel: Analysis, Simulation, and Validation' IEEE Transactions on Vehicular Technology 58 (7):3808-3813en_GB
dc.identifier.issn0018-9545
dc.identifier.issn1939-9359
dc.identifier.doi10.1109/TVT.2008.2002697
dc.identifier.urihttp://hdl.handle.net/10547/272040
dc.description.abstractIn frequency-nonselective fading channels, the partial waves arriving at the mobile receiver cannot explicitly be of homogeneous nature due to nonuniform scattering caused by objects of specific reflective nature. Moreover, shadowing influences the received signal level by causing slow variations to its local mean. In this paper, we investigate a mixture stochastic process accounting for both inhomogeneous scattering and shadow fading by multiplying a Weibull process with a lognormal process. The first process models the possible scattering nonuniformities of the channel, whereas the second process accounts for the slow-term variations of the local mean due to shadowing. An exact solution for the composite probability density function (pdf) will be given, together with approximate solutions for the second-order statistics, i.e., the level crossing rate (LCR) and the average duration of fades (ADF). The approximate solutions come from the assumption of a slowly time-varying lognormal process compared with the Weibull process, the validity of which will be tested via an efficient deterministic simulation scheme that implements the analytical model on a digital computer. Finally, a curve fitting of the LCR to real-world data drawn from channel measurements will demonstrate the flexibility and usefulness of the proposed model.
dc.language.isoenen
dc.publisherIEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INCen_GB
dc.relation.urlhttp://ieeexplore.ieee.org/lpdocs/epic03/wrapper.htm?arnumber=4579736en_GB
dc.subjectfading channelsen_GB
dc.subjectnonuniform scatteringen_GB
dc.subjectSuzuki processen_GB
dc.subjectWeibull fadingen_GB
dc.subjectshadowingen_GB
dc.subjectfading channelsen_GB
dc.titleThe Weibull–lognormal fading channel: analysis, simulation, and validationen
dc.typeArticleen
dc.contributor.departmentUniversity of Patrasen_GB
dc.identifier.journalIEEE Transactions on Vehicular Technologyen_GB
html.description.abstractIn frequency-nonselective fading channels, the partial waves arriving at the mobile receiver cannot explicitly be of homogeneous nature due to nonuniform scattering caused by objects of specific reflective nature. Moreover, shadowing influences the received signal level by causing slow variations to its local mean. In this paper, we investigate a mixture stochastic process accounting for both inhomogeneous scattering and shadow fading by multiplying a Weibull process with a lognormal process. The first process models the possible scattering nonuniformities of the channel, whereas the second process accounts for the slow-term variations of the local mean due to shadowing. An exact solution for the composite probability density function (pdf) will be given, together with approximate solutions for the second-order statistics, i.e., the level crossing rate (LCR) and the average duration of fades (ADF). The approximate solutions come from the assumption of a slowly time-varying lognormal process compared with the Weibull process, the validity of which will be tested via an efficient deterministic simulation scheme that implements the analytical model on a digital computer. Finally, a curve fitting of the LCR to real-world data drawn from channel measurements will demonstrate the flexibility and usefulness of the proposed model.


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