Publication:
Propagation Prediction Over Random Rough Surface By Zeroth Order Induced Current Density

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dc.contributor.advisorRamakrishna Janaswamy
dc.contributor.advisorDo-Hoon Kwon
dc.contributor.authorBalu, Narayana Srinivasan
dc.contributor.departmentUniversity of Massachusetts Amherst
dc.contributor.departmentElectrical & Computer Engineering
dc.date2024-03-28T19:44:29.000
dc.date.accessioned2024-04-26T18:12:09Z
dc.date.available2024-04-26T18:12:09Z
dc.date.issued2014
dc.date.submittedSeptember
dc.date.submitted2014
dc.description.abstractElectromagnetic wave propagation over random sea surfaces is a classical problem of interest for the Navy, and significant research has been done over the years. Here we make use of numerical and analytical methods to predict the propagation of microwaves over random rough surface. The numerical approach involves utilization of the direct solution (using Volterra integral equation of the second kind) to currents induced on a rough surface due to forward propagating waves to compute the scattered field. The mean scattered field is computed using the Monte-Carlo method. Since the exact solution (consisting of an infinite series) to induced current density is computationally intensive, there exists a need to predict the propagation using the closely accurate zeroth order induced current (first term of the series) for time-varying multiple realizations of a random rough surface in a computationally efficient manner. The wind-speed dependent, fully-developed, Piersen-Moskowitz sea spectrum has been considered in order to model a rough sea surface, although other partially-developed roughness spectra may also be utilized. An analytical solution based on the zeroth order current density obtained by deriving the mean scattered field as a function of the range and vertical height by directly using the Parabolic Equation (PE) approximation method and the resulting Green's function has been utilized for a comparative study. The analytical solution takes into account the diffused component of the scattered field.
dc.description.degreeMaster of Science in Electrical and Computer Engineering (M.S.E.C.E.)
dc.identifier.doihttps://doi.org/10.7275/5753278
dc.identifier.orcidN/A
dc.identifier.urihttps://hdl.handle.net/20.500.14394/32974
dc.relation.urlhttps://scholarworks.umass.edu/cgi/viewcontent.cgi?article=1085&context=masters_theses_2&unstamped=1
dc.source.statuspublished
dc.subjectZeroth order induced current density
dc.subjectVolterra integral equation of the second kind
dc.subjectAnalytical solution to zeroth order
dc.subjectMonte-Carlo simulations
dc.subjectRandom rough surface
dc.subjectmean propagation factor
dc.subjectElectromagnetics and Photonics
dc.subjectOther Electrical and Computer Engineering
dc.subjectSignal Processing
dc.subjectSystems and Communications
dc.titlePropagation Prediction Over Random Rough Surface By Zeroth Order Induced Current Density
dc.typeopenaccess
dc.typethesis
digcom.contributor.authorisAuthorOfPublication|email:nbalu@umass.edu|institution:University of Massachusetts Amherst|Balu, Narayana Srinivasan
digcom.identifiermasters_theses_2/129
digcom.identifier.contextkey5753278
digcom.identifier.submissionpathmasters_theses_2/129
dspace.entity.typePublication
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