Author
Duman, Kaan
Other Contributors
Yazici, Birsen; Gerhardt, Lester A; Wang, Meng; McLaughlin, Joyce;
Date Issued
2015-12
Subject
Electrical engineering
Degree
PhD;
Terms of Use
This electronic version is a licensed copy owned by Rensselaer Polytechnic Institute, Troy, NY. Copyright of original work retained by author.;
Abstract
This thesis studies imaging of moving targets in a bistatic SAR (Bi-SAR) configuration. Conventional SAR systems and associated image formation methods are optimized to image stationary scenes. The imaging of moving targets is a challenging task since these targets appear smeared in SAR images. Additionally, clutter due to stationary scatterers may occlude the relatively weak scattered signal from moving targets.; In the second part of the thesis, a theory is introduced to quantify the artifacts due to moving targets in Bi-SAR images. Next, this theory is extended to a two-channel Bi-SAR configuration to quantitatively analyze the moving target artifacts and to determine moving target signatures in displaced phase center antenna images. The results of the analysis are used to develop a novel method for the detection and velocity estimation of moving targets embedded in stationary clutter. The theory and methods are validated using simulated and real data.; The first part of this thesis presents theory, methods and algorithms for Bi-SAR imaging of moving targets. Starting from first principle, it presents and analyzes a bistatic received signal model from a moving scene. Next, it introduces a novel filtered backprojection type imaging method to reconstruct two-dimensional reflectivity images and an entropy optimization-based method for velocity estimation. The point spread function of the imaging operator is studied and a two-stage filter is designed to recover the correct scene reflectivity and to optimize the velocity estimation. The factors affecting image and velocity resolution are analyzed.;
Description
December 2015; School of Engineering
Department
Dept. of Electrical, Computer, and Systems Engineering;
Publisher
Rensselaer Polytechnic Institute, Troy, NY
Relationships
Rensselaer Theses and Dissertations Online Collection;
Access
Restricted to current Rensselaer faculty, staff and students. Access inquiries may be directed to the Rensselaer Libraries.;