Improvement of Continuous Wave Radar Measurements in aPartially Controlled Environment

by Jared Smith

Institution: Wright State University
Year: 2017
Keywords: Electrical Engineering; electrical engineering
Posted: 02/01/2018
Record ID: 2218506
Full text PDF: http://rave.ohiolink.edu/etdc/view?acc_num=wright1496094047730053


A continuous wave (CW) radar system within a partiallycontrolled environment measures scale model aircraft formono-static and fully polarimetric radar imaging. Due to apseudo-far-field setup, wavefront curvature manifests primarily asgeometric distortion. Recently proposed phase error models showinduced geometric distortion to be independent of aperture sizewhich are verified via measurement for Sensors and SignalsExploitation Laboratory (SSEL) collections. The partiallycontrolled nature of the SSEL introduces stray infrastructuralreflections into the measured data. Three methods to reduce straysignals are explored namely: true background subtraction (TBS),running average (RA), and spatial filtering (SF). Of the threemethods, SF provides 15 dB improvement in dynamic range revealingunderlying SSEL structure. Defocus due to quadratic phase error(QPE) is considered, but shown to be negligible for typicalaperture sizes of 20 degrees.Advisors/Committee Members: Saville, Michael (Advisor).