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dc.contributor.advisorKozat, Süleyman Serdar
dc.contributor.authorMarivani, Iman
dc.date.accessioned2017-10-10T13:30:06Z
dc.date.available2017-10-10T13:30:06Z
dc.date.copyright2017-09
dc.date.issued2017-10
dc.date.submitted2017-10-09
dc.identifier.urihttp://hdl.handle.net/11693/33801
dc.descriptionCataloged from PDF version of article.en_US
dc.descriptionThesis (M.S.): Bilkent University, Department of Electrical and Electronics Engineering, İhsan Doğramacı Bilkent University, 2017.en_US
dc.descriptionIncludes bibliographical references (leaves 37-42).en_US
dc.description.abstractWe introduce a novel family of adaptive robust channel estimators for highly chal- lenging underwater acoustic (UWA) channels. Since the underwater environment is highly non-stationary and subjected to impulsive noise, we use adaptive ltering techniques based on minimization of a logarithmic cost function, which results in a better trade-off between the convergence rate and the steady state performance of the algorithm. To improve the convergence performance of the conventional rst and second order linear estimation methods while mitigating the stability issues related to impulsive noise, we intrinsically combine different norms of the error in the cost function using a logarithmic term. Hence, we achieve a com- parable convergence rate to the faster algorithms, while signi cantly enhancing the stability against impulsive noise in such an adverse communication medium. Furthermore, we provide a thorough analysis for the tracking and steady-state performances of our proposed methods in the presence of impulsive noise. In our analysis, we not only consider the impulsive noise, but also take into account the frequency and phase offsets commonly experienced in real life experiments. We demonstrate the performance of our algorithms through highly realistic experi- ments performed on accurately simulated underwater acoustic channels.en_US
dc.description.statementofresponsibilityby Iman Marivani.en_US
dc.format.extentx, 42 leaves : charts (some color) ; 30 cmen_US
dc.language.isoen_USen_US
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.subjectUnderwater communicationsen_US
dc.subjectRobust channel estimationen_US
dc.subjectLogarithmic cost functionen_US
dc.subjectImpulsive noiseen_US
dc.subjectPerformance analysisen_US
dc.subjectCarrier offsetsen_US
dc.titleRobust adaptive algorithms for underwater acoustic channel estimation and their performance analysisen_US
dc.title.alternativeSualtı akustik kanal kestiriminde sağlam adaptif algoritmalar ve performans analizien_US
dc.typeThesisen_US
dc.departmentDepartment of Electrical and Electronics Engineeringen_US
dc.publisherBilkent Universityen_US
dc.description.degreeM.S.en_US
dc.identifier.itemidB156710


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