A Model for the Detailed Analysis of Radio Links Involving Tree Canopies

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dc.contributor.authorPerez-Fontan, Fernando
dc.contributor.authorKvicera, Milan
dc.contributor.authorPechac, Pavel
dc.contributor.authorIsrael, Jonathan
dc.coverage.issue4cs
dc.coverage.volume25cs
dc.date.accessioned2017-01-27T06:24:08Z
dc.date.available2017-01-27T06:24:08Z
dc.date.issued2016-12cs
dc.description.abstractDetailed analysis of tree canopy interaction with incident radiowaves has mainly been limited to remote sensing for the purpose of forest classification among many other applications. This represents a monostatic configuration, unlike the case of communication links, which are bistatic. In general, link analyses have been limited to the application of simple, empirical formulas based on the use of specific attenuation values in dB/m and the traversed vegetated mass as, e.g., the model in Recommendation ITU-R P.833-8 [1]. In remote sensing, two main techniques are used: Multiple Scattering Theory (MST) [2][5] and Radiative Transfer Theory (RT), [5] and [6]. We have paid attention in the past to MST [7][10]. It was shown that a full application of MST leads to very long computation times which are unacceptable in the case where we have to analyze a scenario with several trees. Extensive work using MST has been also presented by others in [11][16] showing the interest in this technique. We have proposed a simplified model for scattering from tree canopies based on a hybridization of MST and a modified physical optics (PO) approach [16]. We assume that propagation through a canopy is accounted for by using the complex valued propagation constant obtained by MST. Unlike the case when the full MST is applied, the proposed approach offers significant benefits including a direct software implementation and acceptable computation times even for high frequencies and electrically large canopies. The proposed model thus replaces the coherent component in MST, significant in the forward direction, but keeps the incoherent or diffuse scattering component present in all directions. The incoherent component can be calculated within reasonable times. Here, we present tests of the proposed model against MST using an artificial single-tree scenario at 2 GHz and 10 GHz.en
dc.formattextcs
dc.format.extent637-643cs
dc.format.mimetypeapplication/pdfen
dc.identifier.citationRadioengineering. 2016 vol. 25, č. 4, s. 637-643. ISSN 1210-2512cs
dc.identifier.doi10.13164/re.2016.0637en
dc.identifier.issn1210-2512
dc.identifier.urihttp://hdl.handle.net/11012/63745
dc.language.isoencs
dc.publisherSpolečnost pro radioelektronické inženýrstvícs
dc.relation.ispartofRadioengineeringcs
dc.relation.urihttp://www.radioeng.cz/fulltexts/2016/16_04_0637_0643.pdfcs
dc.rightsCreative Commons Attribution 3.0 Unported Licenseen
dc.rights.accessopenAccessen
dc.rights.urihttp://creativecommons.org/licenses/by/3.0/en
dc.subjectRadiowave propagationen
dc.subjectvegetationen
dc.subjectscatteringen
dc.subjectmultiple scattering theoryen
dc.titleA Model for the Detailed Analysis of Radio Links Involving Tree Canopiesen
dc.type.driverarticleen
dc.type.statusPeer-revieweden
dc.type.versionpublishedVersionen
eprints.affiliatedInstitution.facultyFakulta eletrotechniky a komunikačních technologiícs
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