Enhanced detection of orthogonal radar waveforms using time-frequency and bi-frequency signal processing techniques

dc.contributor.advisorPace, Phillip E.
dc.contributor.authorCrescitelli, David M.
dc.contributor.authorKistner, Patrick B.
dc.contributor.corporateNaval Postgraduate School (U.S.)
dc.contributor.departmentInformation Warfare Systems Engineering
dc.contributor.secondreaderSmith, Terry E.
dc.description.abstractThis thesis investigates the periodic autocorrelation function (PACF) and periodic ambiguity function (PAF) for orthogonal continuous waveform (CW) modulations used in netted low probability of intercept (LPI) radar. Three orthogonal polyphase sequences and one frequency coding sequence are examined and their PACF and PAF characteristics are quantified. The Wigner-Ville distribution (WVD) and quadrature mirror filter bank (QMFB) timefrequency signal processing techniques and the cyclostationary bi-frequency technique (often used in non-cooperative intercept receivers) are used to detect the orthogonal CW signals and extract their parameters. The results shows that a combination of the techniques used were able to extract the basic signal parameters of bandwidth and code period from the polyphase waveforms and also the frequency hop slots and code length from the frequency coding sequence. The concept of using a swarm of unmanned aerial vehicles (UAV) is examined from the viewpoint of a coordinated group of netted intercept receivers in search of an LPI radar network.en_US
dc.description.distributionstatementApproved for public release; distribution is unlimited.
dc.description.serviceUS Navy (USN) authors.en_US
dc.format.extentxvi, 117 p. ;en_US
dc.publisherMonterey, California. Naval Postgraduate Schoolen_US
dc.rightsThis publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.en_US
dc.subject.lcshLow probability of intercept radaren_US
dc.subject.lcshSignal processingen_US
dc.subject.lcshDigital techniquesen_US
dc.subject.lcshCyclostationary wavesen_US
dc.subject.lcshMathematical modelsen_US
dc.subject.lcshSwarming (Military science)en_US
dc.subject.lcshDrone aircraften_US
dc.titleEnhanced detection of orthogonal radar waveforms using time-frequency and bi-frequency signal processing techniquesen_US
etd.thesisdegree.disciplineInformation Warfare Systems Engineeringen_US
etd.thesisdegree.grantorNaval Postgraduate Schoolen_US
etd.thesisdegree.nameMaster of Science in Information Warfare Systems Engineegingen_US
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