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

Peter J. Collins, PhD

Abstract

The Stimulated Unintended Radiated Emissions (SURE) process has been proven capable of classifying a device (e.g. a loaded antenna) as either operational or defective. Currently, the SURE process utilizes a specialized noise radar which is bulky, expensive and not easily supported. With current technology advancements, Software Defined Radios (SDRs) have become more compact, more readily available and significantly cheaper. The research here examines whether multiple SDRs can be integrated to replace the current specialized ultra-wideband noise radar used with the SURE process. The research specifically targets whether or not multiple SDR sub-band collections can be combined to form a wider composite band collection thereby achieving instantaneous bandwidth expansion. The goal is to achieve instantaneous bandwidth expansion without using a known a priori signal information or specialized circuitry. Simulations are conducted to develop a process for instantaneous bandwidth expansion and test the bandwidth expansion approach. Hardware tests are conducted to verify simulation results and demonstrate that the bandwidth expansion approach is successful in achieving instantaneous bandwidth expansion. The results here are based on combining collections from two Software Defined Radios (SDRs) having individual bandwidths of 1 MHz. The ability to achieve instantaneous bandwidth expansion up to 1.98 MHz is demonstrated using a cross-correlation approach that combines the multiple sub-band collections into a single wider band collection (without significant distortion or data loss).

AFIT Designator

AFIT-ENG-MS-19-M-024

DTIC Accession Number

AD1074947

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