Accession Number : ADA259124


Title :   An Analytical and Experimental Investigation of FM-by-Noise Jamming


Descriptive Note : Master's thesis


Corporate Author : AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING


Personal Author(s) : Daly, Charles J


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a259124.pdf


Report Date : Dec 1992


Pagination or Media Count : 126


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


Descriptors :   *NOISE JAMMERS , TEST AND EVALUATION , MEASUREMENT , RATIOS , ELECTRONIC WARFARE , WARFARE , PARAMETERS , THEORY , FREQUENCY MODULATION , WAVEFORMS , TIME , INCLUSIONS , QUALITY , RECEIVERS , BEHAVIOR , ANALYZERS , BANDWIDTH , MODULATION , OSCILLOSCOPES , REPRODUCTION , SPECTRUM ANALYZERS , ELECTRONIC COUNTERMEASURES , FREQUENCY DOMAIN , NOISE JAMMING


Subject Categories : Countermeasures


Distribution Statement : APPROVED FOR PUBLIC RELEASE