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dc.contributor.authorMosland, Eivind Nag
dc.contributor.authorLunde, Per
dc.contributor.authorKocbach, Jan Martin
dc.date.accessioned2024-05-31T11:46:58Z
dc.date.available2024-05-31T11:46:58Z
dc.date.created2023-11-10T08:19:50Z
dc.date.issued2023
dc.identifier.issn2215-0161
dc.identifier.urihttps://hdl.handle.net/11250/3132121
dc.description.abstractIn measurements and numerical modelling of wave propagation, undesired interference between direct and multipath arrivals can be reduced using Fourier-based signal processing methods. Existing methods, such as cepstral analysis and time-signal gating, are not applicable to all cases. Here, an alternative Fourier-based signal processing method is presented, called spectrum-of-spectrum (SoS) filtering. Its main advantage over existing methods is its ability to extract single direct or multipath arrivals for relatively short propagation distances even when subsequent arrivals do not become successively weaker. The method is based on the following steps: • Apply a lowpass filter to the real and imaginary parts of an input frequency spectrum individually, using a digital finite impulse response (FIR) filter in the frequency domain. • Recombine the filtered real and imaginary parts of the frequency spectrum to get the frequency spectrum of the direct arrival. • For extraction of the first multipath arrival, subtract the filtered frequency spectrum from the input frequency spectrum and repeat the previous steps. Repeat multiple times to extract subsequent multipath arrivals.en_US
dc.language.isoengen_US
dc.publisherElsevieren_US
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 Internasjonal*
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/deed.no*
dc.titleA spectrum-of-spectrum filtering method to extract direct and multipath arrivals from simulations and measurementsen_US
dc.typeJournal articleen_US
dc.typePeer revieweden_US
dc.description.versionpublishedVersionen_US
dc.rights.holderCopyright 2023 The Author(s)en_US
dc.source.articlenumber102475en_US
cristin.ispublishedtrue
cristin.fulltextoriginal
cristin.qualitycode1
dc.identifier.doi10.1016/j.mex.2023.102475
dc.identifier.cristin2194850
dc.source.journalMethodsXen_US
dc.relation.projectNorges forskningsråd: 303169en_US
dc.identifier.citationMethodsX. 2023, 11, 102475.en_US
dc.source.volume11en_US


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Attribution-NonCommercial-NoDerivatives 4.0 Internasjonal
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