Modeling and analysis of VHF wave propagation in forested environments

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dc.contributor.advisorLing, Hao
dc.creatorLi, Yang, 1982-
dc.date.accessioned2017-04-25T14:21:41Z
dc.date.available2017-04-25T14:21:41Z
dc.date.issued2007-05
dc.description.abstractA large proportion of the Earth's surface is covered by forests. The existence of trees results in a much higher propagation loss than that in free space for radio waves. Therefore, to improve the communication link in the forest is not only an important but also a challenging task for researchers. In this thesis, the Very High Frequency (VHF) radio wave propagation in the forest is studied. A forest can be described using an anisotropic slab model in this frequency band. The rigorous solution to the slab model is studied through a numerical implementation of the Sommerfeld integral. To reveal the propagation mechanisms, broadband data are generated and transformed into the time domain to identify the time-of-flight. To improve the computational efficiency and confirm the validity of the above full wave analysis, a ray optics solution and a 2D-Finite Difference Time Domain (FDTD) solution are implemented next. Further, comparisons with published measurement and simulation results are carried out to confirm both the simulation results and explanations of the propagation mechanisms in the forest.en_US
dc.description.departmentElectrical and Computer Engineeringen_US
dc.format.mediumelectronicen_US
dc.identifierdoi:10.15781/T2CV4BX58
dc.identifier.urihttp://hdl.handle.net/2152/46576
dc.language.isoengen_US
dc.relation.ispartofUT Electronic Theses and Dissertationsen_US
dc.rightsCopyright © is held by the author. Presentation of this material on the Libraries' web site by University Libraries, The University of Texas at Austin was made possible under a limited license grant from the author who has retained all copyrights in the works.en_US
dc.rights.restrictionRestricteden_US
dc.subjectForesten_US
dc.subjectRadio wave propagationen_US
dc.subjectTreesen_US
dc.subjectVery High Frequency (VHF) radio wavesen_US
dc.titleModeling and analysis of VHF wave propagation in forested environmentsen_US
dc.typeThesisen_US
dc.type.genreThesisen_US
thesis.degree.departmentElectrical and Computer Engineeringen_US
thesis.degree.disciplineElectrical and Computer Engineeringen_US
thesis.degree.grantorUniversity of Texas at Austinen_US
thesis.degree.levelMastersen_US
thesis.degree.nameMaster of Scienceen_US

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