Tomographic processing of synthetic aperture radar signals for enhanced resolution

Spotlight-mode synthetic aperture radar imaging is studied from the viewpoint of tomographic signal processing which allows the relaxation of the nearly-universal assumption that plane waves pass over the ground patch. This allows high-quality image reconstruction in the face of arbitrary amounts of wavefront curvature such as would be present when the angle subtended by the ground patch, as seen by the radar, is not small. One such application is wide-area surveillance. A methodology is used which has the benefits of a wideband transmitted signal (impulse) and a sensible simulation. Image reconstruction algorithms are developed for monostatic and bistatic systems. Simulation results using these algorithms compare favorably with baseline simulations which use a more conventional algorithm operating on data which do not embody the effects of wavefront curvature. Comments on system design and computational implementation are made as necessary. A new set of problems which appear to benefit from the tomographic viewpoint is posed. This work may also find applications in some forms of reflection tomography.

Name thesis:degree_name

Ph.D.

Level thesis:degree_level

Dissertation

Discipline thesis:degree_discipline

Electrical Engineering

Grantor

University of Illinois at Urbana-Champaign

Year dc:date

2011

Author dc:creator

• Bauck, Jerald Lee

Contributors dc:contributor

• Jenkins, W. Kenneth

• Engineering, Electronics and Electrical
• Remote Sensing

Statement dc:rights

• Copyright 1990 Bauck, Jerald Lee

Language dc:language

eng

Identifier

AAI9021650
(UMI)AAI9021650

OAI identifier oai:identifier

oai:www.ideals.illinois.edu:2142/21240