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dc.contributor.advisorFargues, Monique P.
dc.contributor.authorYoung, Andrew F.
dc.date.accessioned2012-03-14T17:39:05Z
dc.date.available2012-03-14T17:39:05Z
dc.date.issued2008-06
dc.description.abstractAs the digital communications industry continues to grow and evolve, the applications of this discipline continue to grow as well. This growth, in turn, has spawned an increasing need to seek automated methods of classifying digital modulation types. This research is a revision of previous work, using the latest mathematical software including MATLAB version 7 and Simulink ®. The program considers the classification of nine different modulation types. Specifically, the classification scheme can differentiate between 2, 4, and 8 PSK, 256-QAM from other types of M-QAM signals, and also M-FSK signals from PSK and QAM signals in various types of propagation channels, including multipath fading and a variety of signal-to-noise levels. This method successfully identifies these modulation types without the benefit of a priori information. Higher-order statistical parameters are selected as class features and are tested in a classifier for their ability to identify the above modulation types. This study considers the effects due to realistic multipath propagation channels and additive white Gaussian noise. Using these features, and considering all fading conditions, it was determined that the classifier was correct for a randomly sent signal under randomly high or low SNR levels (low: 0dB to 8dB; high: 50dB to 100dB) over 83.9% of the time.en_US
dc.description.urihttp://archive.org/details/classificationof109453688
dc.format.extentxvi, 65 p. ;en_US
dc.publisherMonterey California. Naval Postgraduate Schoolen_US
dc.subject.lcshElectrical engineeringen_US
dc.subject.lcshDigital communicationsen_US
dc.subject.lcshClassificationen_US
dc.titleClassification of digital modulation types in multipath environmentsen_US
dc.typeThesisen_US
dc.contributor.corporateNaval Postgraduate School (U.S.).
dc.contributor.schoolCristi, Roberto
dc.contributor.departmentElectrical Engineering
dc.identifier.oclc729589011
etd.thesisdegree.nameM.S.en_US
etd.thesisdegree.levelMastersen_US
etd.thesisdegree.grantorNaval Postgraduate Schoolen_US
dc.description.distributionstatementApproved for public release; distribution is unlimited.


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