Title:
Fast circular aperture synthesis in sar all-aspect target imaging

Simple item page
dc.contributor.advisor Barnes, Christopher F.
dc.contributor.author Burki, Jehanzeb en_US
dc.contributor.committeeMember Anew F. Peterson
dc.contributor.committeeMember Williams, Douglas B.
dc.contributor.committeeMember Haomin Zhou
dc.contributor.committeeMember Justin K. Romberg
dc.contributor.department Electrical and Computer Engineering en_US
dc.date.accessioned 2009-01-22T15:42:02Z
dc.date.available 2009-01-22T15:42:02Z
dc.date.issued 2008-10-14 en_US
dc.description.abstract The objective of this research is a fast circular synthetic aperture radar (F-CSAR) algorithm. Slow-time imaging distinguishes synthetic aperture radar (SAR) from its predecessor imaging radars. SAR slow-time imaging is strongly rooted in Huygens-Fresnel principle and Kirchhoff's approximation based scalar diffraction theory. Slant-plane SAR Green's function and resultant Fourier integral, unlike some Fourier integrals, cannot be analyzed using residue theory from complex analysis and Cauchy-Riemann equations yield analyticity. The asymptotic expansion of 1D and 2D Fourier integrals renders a decomposition of the Green's function leading to SAR data focusing. The research unveils Fraunhofer diffraction patterns in 2D aperture synthesis formulation corresponding to various aperture shapes including circular aperture that appears to be an optimum aperture shape from the mathematical condition in the asymptotic expansion. It is shown that these diffraction patterns may be used for refocusing of defocused images. F-CSAR algorithm is demonstrated using Householder transform recently shown to have improved error bounds and stability. Research is also carried out into various interpolation schemes. Backprojection implementation of CSAR is compared to F-CSAR and elevation coverage renders 3D reconstruction. F-CSAR is also demonstrated using GTRI T-72 tank turntable data. en_US
dc.description.degree Ph.D. en_US
dc.identifier.uri http://hdl.handle.net/1853/26514
dc.publisher Georgia Institute of Technology en_US
dc.subject Synthetic aperture en_US
dc.subject Fourier transform en_US
dc.subject Imaging en_US
dc.subject SAR en_US
dc.subject CSAR en_US
dc.subject Algorithm en_US
dc.subject.lcsh Synthetic Aperture Radar
dc.subject.lcsh Imaging systems
dc.subject.lcsh Fourier transform optics
dc.title Fast circular aperture synthesis in sar all-aspect target imaging en_US
dc.type Text
dc.type.genre Dissertation
dspace.entity.type Publication
local.contributor.advisor Barnes, Christopher F.
local.contributor.corporatename School of Electrical and Computer Engineering
local.contributor.corporatename College of Engineering
relation.isAdvisorOfPublication 90f90bac-24b1-4065-963f-5e2c7452e4ef
relation.isOrgUnitOfPublication 5b7adef2-447c-4270-b9fc-846bd76f80f2
relation.isOrgUnitOfPublication 7c022d60-21d5-497c-b552-95e489a06569
Files
Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
burki_jehanzeb_200812_phd.pdf
Size:
4.88 MB
Format:
Adobe Portable Document Format
Description:
Download
Collections
Theses and Dissertations