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dc.contributor.authorTu, K.en_US
dc.contributor.authorDuman, T. M.en_US
dc.contributor.authorStojanovic, M.en_US
dc.contributor.authorProakis J. G.en_US
dc.date.accessioned2016-02-08T09:42:15Z
dc.date.available2016-02-08T09:42:15Z
dc.date.issued2013en_US
dc.identifier.issn0364-9059
dc.identifier.urihttp://hdl.handle.net/11693/21166
dc.description.abstractIn this paper, we focus on orthogonal frequency-division multiplexing (OFDM) receiver designs for underwater acoustic (UWA) channels with user-and/or path-specific Doppler scaling distortions. The scenario is motivated by the cooperative communications framework, where distributed transmitter/receiver pairs may experience significantly different Doppler distortions, as well as by the single-user scenarios, where distinct Doppler scaling factors may exist among different propagation paths. The conventional approach of front-end resampling that corrects for common Doppler scaling may not be appropriate in such scenarios, rendering a post-fast-Fourier-transform (FFT) signal that is contaminated by user-and/or path-specific intercarrier interference. To counteract this problem, we propose a family of front-end receiver structures that utilize multiple-resampling (MR) branches, each matched to the Doppler scaling factor of a particular user and/or path. Following resampling, FFT modules transform the Doppler-compensated signals into the frequency domain for further processing through linear or nonlinear detection schemes. As part of the overall receiver structure, a gradient-descent approach is also proposed to refine the channel estimates obtained by standard sparse channel estimators. The effectiveness and robustness of the proposed receivers are demonstrated via simulations, as well as emulations based on real data collected during the 2010 Mobile Acoustic Communications Experiment (MACE10, Martha's Vineyard, MA) and the 2008 Kauai Acomms MURI (KAM08, Kauai, HI) experiment.en_US
dc.language.isoEnglishen_US
dc.source.titleIEEE Journal of Oceanic Engineeringen_US
dc.relation.isversionofhttp://dx.doi.org/10.1109/JOE.2012.2221812en_US
dc.subjectChannel estimationen_US
dc.subjectDoppler effecten_US
dc.subjectAcoustic communicationsen_US
dc.subjectConventional approachen_US
dc.subjectIntercarrier interferenceen_US
dc.subjectNonlinear detection schemesen_US
dc.subjectReceiver structureen_US
dc.subjectTime varying channelen_US
dc.subjectUnderwater acoustic channelsen_US
dc.subjectUnderwater communicationen_US
dc.subjectChannel estimationen_US
dc.subjectDoppler effecten_US
dc.subjectExperimentsen_US
dc.subjectFast Fourier transformsen_US
dc.subjectIntelligent controlen_US
dc.subjectInterference suppressionen_US
dc.subjectMatched filtersen_US
dc.subjectMathematical transformationsen_US
dc.subjectMIMO systemsen_US
dc.subjectMultiuser detectionen_US
dc.subjectOrthogonal frequency division multiplexingen_US
dc.subjectUnderwater acousticsen_US
dc.subjectSignal systemsen_US
dc.titleMultiple-resampling receiver design for OFDM over Doppler-distorted underwater acoustic channelsen_US
dc.typeArticleen_US
dc.departmentDepartment of Electrical and Electronics Engineeringen_US
dc.citation.spage333en_US
dc.citation.epage346en_US
dc.citation.volumeNumber38en_US
dc.citation.issueNumber2en_US
dc.identifier.doi10.1109/JOE.2012.2221812en_US


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