Intermittently Nonlinear Impulsive Noise Mitigation and Doppler Shift Compensation in UWA-OFDM Systems

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dc.contributor.authorBarazideh, Rezaen
dc.contributor.authorNiknam, Solmazen
dc.contributor.authorNatarajan, Balasubramaniamen
dc.contributor.authorNikitin, Alexei V.en
dc.contributor.departmentElectrical and Computer Engineeringen
dc.date.accessioned2019-05-14T12:35:02Zen
dc.date.available2019-05-14T12:35:02Zen
dc.date.issued2019en
dc.description.abstractImpulsive noise (IN) and Doppler shift can significantly degrade the performance of orthogonal frequency-division multiplexing (OFDM)-based underwater acoustic (UWA) communication systems. In this paper, we propose a receiver structure that deals efficiently with both these channel impairments in a coded OFDM-based UWA system. First, an analog nonlinear preprocessor (ANP) is proposed to efficiently detect and mitigate IN in an analog domain. The proposed ANP exhibits intermittent nonlinearity when there is impulsivity. Next, the impact of IN on a two-step Doppler shift compensation approach is quantified. Specifically, the ability of the ANP to improve the robustness of Doppler shift compensation in the presence of IN is highlighted. The performance improvement of the proposed receiver is due to the fact that unlike the other nonlinear methods, the ANP is implemented in the analog domain where the outliers are still broadband and distinguishable. The simulation results also demonstrate the superior bit-error-rate (BER) performance of our approach relative to classic approaches that use blanking and/or clipping for IN mitigation.en
dc.description.notesThis work was supported in part by the Kansas State University Open Access Publishing Fund.en
dc.description.sponsorshipKansas State University Open Access Publishing Funden
dc.format.mimetypeapplication/pdfen
dc.identifier.doihttps://doi.org/10.1109/ACCESS.2019.2904010en
dc.identifier.eissn2169-3536en
dc.identifier.urihttp://hdl.handle.net/10919/89503en
dc.identifier.volume7en
dc.language.isoenen
dc.publisherIEEEen
dc.rightsCreative Commons Attribution 4.0 Internationalen
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/en
dc.subjectImpulsive noise (IN)en
dc.subjectanalog nonlinear preprocessor (ANP)en
dc.subjectorthogonal frequency-division multiplexing (OFDM)en
dc.subjectDoppler shiften
dc.subjectunderwater acoustic (UWA)en
dc.titleIntermittently Nonlinear Impulsive Noise Mitigation and Doppler Shift Compensation in UWA-OFDM Systemsen
dc.title.serialIEEE Accessen
dc.typeArticle - Refereeden
dc.type.dcmitypeTexten

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