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dc.contributor.advisorHippenstiel, Ralph D.
dc.contributor.authorKhalil, Nabil Hamdy Shaker
dc.date.accessioned2012-08-09T19:24:43Z
dc.date.available2012-08-09T19:24:43Z
dc.date.issued1997-09
dc.identifier.urihttp://hdl.handle.net/10945/9156
dc.description.abstractFrequency hopped signals are widely used in various communication applications for their inherent security features. The demand, by civilian and governmental agencies, to intercept communication signals is increasing. The interception task can be summarized by detecting the signal's presence in additive noise, classifying the modulation type, estimating the control parameters, decoding the data, and decrypting the information content. This work addresses the merging of wavelet and correlation concepts to detect, classify and estimate the parameters of frequency hopped signals. We address the interception problem in two ways. The first approach is based on a visual inspection of the wavelet surfaces generated from the instantaneous correlation function of the communication signal and leads to hop start/stop times estimates. In the second approach, we apply an energy-based processing scheme to estimate the hop start and stop times, the hop scale pattern, and the hop frequency. Results show that frequency hopped signals can be identified at an SNR of 3 dB or 6 dB using visual inspection or an automated scheme, respectivelyen_US
dc.description.urihttp://archive.org/details/waveletnalysisof109459156
dc.language.isoeng
dc.publisherMonterey, California. Naval Postgraduate Schoolen_US
dc.titleWavelet analysis of instantaneous correlations with application to frequency hopped signalsen_US
dc.subject.authorWavelet analysisen_US
dc.subject.authortime-varying correlation functionsen_US
dc.subject.authorinstantaneous correlation functionsen_US
dc.subject.authorfrequency hopped signalsen_US
dc.subject.authorinterceptionen_US
dc.subject.authorclassificationen_US
dc.description.serviceColonel, Egyptian Armyen_US
etd.thesisdegree.nameDoctor of Philosophy in Electrical Engineeringen_US
etd.thesisdegree.levelDoctoralen_US
etd.thesisdegree.disciplineElectrical Engineeringen_US
etd.thesisdegree.grantorNaval Postgraduate Schoolen_US
dc.description.distributionstatementApproved for public release; distribution is unlimited.


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