Moving and stationary target acquisition radar image enhancement through polynomial windows

Authors

Rajarajeswari Devarajulu, University of Texas-Pan American

Date of Award

12-2005

Document Type

Thesis

Degree Name

Master of Science (MS)

Department

Electrical Engineering

First Advisor

Dr. Jae Sok Son

Second Advisor

Dr. Charles Harlow

Third Advisor

Dr. Andras Balogh

Abstract

The Fourier transform involved in synthetic aperture radar (SAR) imaging causes undesired sidelobes which obscure weak backscatters and affect the image clarity. These sidelobes can be suppressed without deteriorating the image resolution by smoothing functions known as windowing or apodization. Recently, the theory of orthogonal polynomials has gained considerable attention in signal processing applications. The window functions that are derived from the orthogonal polynomials have interesting sidelobe roll-off properties for better sidelobe apodization, hence it can be used for radar image enhancement. In this work, a new window is constructed from Jacobi orthogonal polynomials and its performance in SAR imaging is analyzed and compared with commonly used window functions. Also, apodization functions involved in Fourier transform harmonic analysis and Fourier transform spectroscopy are discussed in the context of SAR imaging.

Comments

Copyright 2005 Rajarajeswari Devarajulu. All Rights Reserved.

https://go.openathens.net/redirector/utrgv.edu?url=https://www.proquest.com/dissertations-theses/moving-stationary-target-acquisition-radar-image/docview/305349311/se-2?accountid=7119

Granting Institution

University of Texas-Pan American