Robust adaptive algorithms for underwater acoustic channel estimation and their performance analysis

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dc.citation.epage68en_US
dc.citation.spage57en_US
dc.citation.volumeNumber68en_US
dc.contributor.authorKari, D.en_US
dc.contributor.authorMarivani, I.en_US
dc.contributor.authorKhan, F.en_US
dc.contributor.authorSayin, M. O.en_US
dc.contributor.authorKozat, S. S.en_US
dc.date.accessioned2018-04-12T11:12:32Z
dc.date.available2018-04-12T11:12:32Z
dc.date.issued2017en_US
dc.departmentDepartment of Electrical and Electronics Engineeringen_US
dc.description.abstractWe introduce a novel family of adaptive robust channel estimators for highly challenging underwater acoustic (UWA) channels. Since the underwater environment is highly non-stationary and subjected to impulsive noise, we use adaptive filtering 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 first 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 comparable convergence rate to the faster algorithms, while significantly 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 experiments performed on accurately simulated underwater acoustic channels.en_US
dc.embargo.release2019-09-01en_US
dc.identifier.doi10.1016/j.dsp.2017.05.006en_US
dc.identifier.issn1051-2004
dc.identifier.urihttp://hdl.handle.net/11693/37404
dc.language.isoEnglishen_US
dc.publisherElsevier Inc.en_US
dc.relation.isversionofhttp://dx.doi.org/10.1016/j.dsp.2017.05.006en_US
dc.source.titleDigital Signal Processingen_US
dc.subjectCarrier offsetsen_US
dc.subjectImpulsive noiseen_US
dc.subjectLogarithmic cost functionen_US
dc.subjectPerformance analysisen_US
dc.subjectRobust channel estimationen_US
dc.subjectUnderwater communicationsen_US
dc.titleRobust adaptive algorithms for underwater acoustic channel estimation and their performance analysisen_US
dc.typeArticleen_US

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