Date of Award

12-1992

Document Type

Thesis

Degree Name

Master of Science in Electrical Engineering

Department

Department of Electrical and Computer Engineering

Abstract

Among the jamming waveforms used in Electronic Warfare, FM-by-noise is the least understood, and no exhaustive analytical and experimental investigation of the subject exists. This investigation presents a thorough review, consolidation, and elucidation of the theory of FM-by-noise. To explain and predict the behavior of FM-by-noise at RF and IF, three useful ratios, namely the deviation-to-victim ratio, the noise-to-victim ratio, and the sweep- to-victim ratio, are developed. To complement the theory, results of FM-by-noise jamming experiments conducted using commercial test and measurement equipment are presented. Specifically, the time- and frequency-domain behavior of FM-by- noise at RF and IF is studied with the baseband noise bandwidth, peak frequency deviation, and victim receiver bandwidth as parameters. An important feature of the experimental portion of this investigation is the inclusion of reproductions of actual oscilloscope and spectrum analyzer displays illustrating the behavior of FM-by-noise. Finally, the concept of noise quality, as a measure of noise jammer effectiveness, is reexamined. Three noise quality factors are investigated. An existing noise quality measure is verified, and two alternative noise quality factors are proposed.

AFIT Designator

AFIT-GE-ENG-92D-14

DTIC Accession Number

ADA259124

Comments

The author's Vita page is omitted.

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