Aileen Nundu

Date of Award

3-22-2019

Document Type

Thesis

Degree Name

Master of Science in Electrical Engineering

Department

Department of Electrical and Computer Engineering

First Advisor

Julie A. Jackson, PhD

Abstract

Passive bistatic radar (PBR) is a fairly active area of research due to the opportunities offered by the ability to use emitters of opportunity for target detection and tracking as well as Synthetic Aperture Radar (SAR) imaging. There is an increasing variety and availability of signals that can be exploited for passive radar and there is also the advantage of angular diversity offered by the bistatic geometry and the potential for stealth operations afforded a passive receiver. Notwithstanding its merits, PBR is complicated by the inevitable presence of Direct Path Interference (DPI) from the transmitter to the receiver, which can be orders of magnitude stronger than the echo signals from the targets of interest, resulting in missed targets. In addition, available signals are characterized by features necessary for the purpose for which they are designed, but that are not suited to radar applications due to the introduction of ambiguities in range and Doppler that mimic real targets. This thesis seeks to articulate two specific challenges of PBR in the context of SAR imaging using OFDM signals - DPI and range ambiguities, and the signal processing necessary to mitigate their effects. MATLAB® simulated scenarios are used throughout the work to illustrate the problem and solutions.

AFIT Designator

AFIT-ENG-MS-19-M-049

DTIC Accession Number

AD1076185

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