Space-frequency block coding for underwater acoustic communications

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• dc.contributor.author Valera Zorita, Eduardca
• dc.contributor.author Stojanovic, Milicaca
• dc.date.accessioned 2016-07-26T13:03:49Z
• dc.date.available 2016-07-26T13:03:49Z
• dc.date.issued 2015
• dc.description.abstract In this paper, Alamouti space-frequency block coding, applied over the carriers of an orthogonal frequency-division multiplexing (OFDM) system, is considered for obtaining transmit diversity in an underwater acoustic channel. This technique relies on the assumptions that there is sufficient spatial diversity between the channels of the two transmitters, and that each channel changes slowly over the carriers, thus satisfying the basic Alamouti coherence requirement and allowing simple data detection. We propose an adaptive channel estimation method based on Doppler prediction and time smoothing, whose decision-directed operation allows for reduction in the pilot overhead. System performance is demonstrated using real data transmitted in the 10-15-kHz acoustic band from a vehicle moving at 0.5-2 m/s and received over a shallow-water channel, using quadrature phase-shift keying (QPSK) and a varying number of carriers ranging from 64 to 1024. Results demonstrate an average mean squared error gain of about 2 dB as compared to the single-transmitter case and an order of magnitude decrease in the bit error rate when the number of carriers is chosen optimally.ca
• dc.description.sponsorship This work was supported in part by the ONR under grants N00014-07-1-0738, N00014-09-1-0700, and the NSF grant CNS-1212999.
• dc.format.mimetype application/pdfca
• dc.identifier.citation Valera Zorita E, Stojanovic M. Space-frequency block coding for underwater acoustic communications. IEEE Journal of Oceanic Engineering. 2015; 40(2): 303-314. DOI 10.1109/JOE.2014.2316558ca
• dc.identifier.doi http://dx.doi.org/10.1109/JOE.2014.2316558
• dc.identifier.issn 0364-9059
• dc.identifier.uri http://hdl.handle.net/10230/27131
• dc.language.iso engca
• dc.publisher Institute of Electrical and Electronics Engineers (IEEE)ca
• dc.relation.ispartof IEEE Journal of Oceanic Engineering. 2015; 40(2): 303-314
• dc.rights © 2015 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.ca
• dc.rights.accessRights info:eu-repo/semantics/openAccessca
• dc.subject.other Ones sonoresca
• dc.subject.other Acústica submarinaca
• dc.title Space-frequency block coding for underwater acoustic communicationsca
• dc.type info:eu-repo/semantics/articleca
• dc.type.version info:eu-repo/semantics/acceptedVersionca