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Underwater acoustic communication using a time-reversal mirror approach

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dc.contributor.authorSilva, A.
dc.contributor.authorJesus, S. M.
dc.contributor.authorGomes, J.
dc.contributor.authorBarroso, V.
dc.date.accessioned2014-10-10T09:51:57Z
dc.date.available2014-10-10T09:51:57Z
dc.date.issued2000
dc.description.abstractThis work presents a technique for reducing the intersymbol interference (ISI) in underwater coherent communications using time-reversal acoustics. The paper introduces a “virtual" time-reversal mirror (TRM) that is implemented electronically at the receiver array and simulates the kind of processing that would be done by an actual TRM during the reciprocal propagation stage. In both cases, a probe pulse sent by the transmitter/receiver located at the (physical or virtual) focal point and received at the array provides a template impulse response for undoing the effects of multipath by straightforward linear filtering. Very simple equalization algorithms may subsequently be used to decode the message. Channel variations between transmission of the probe and the actual message lead to mismatch that can impact the coherence of TRMs, and hence degrade the focusing power of the array. Computer simulations using a normal-mode propagation model in a reallistic shallow water scenario show that, even with high uncertainty in the transmitter and receiver relative positions, the virtual mirror can strongly reduce the effects of multipath. Although a multichannel equalizer attains a lower mean-square error, the "virtual" TRM can provide comparable results under low mismatch with much smaller complexity.por
dc.identifier.citationA. SILVA, J. GOMES, S.M. JESUS e V. BARROSO, ''Underwater Acoustic Communication Using a Time-Reversal Mirror Approach" in Chevret, P. e Zakharia, M.E. (Eds.) "Proceedings of the Fifth European Conference on Underwater Acoustics, ECUA 2000", 2000, pp.531-536.por
dc.identifier.otherAUT: SJE00662; ASI00912;
dc.identifier.urihttp://hdl.handle.net/10400.1/5253
dc.language.isoengpor
dc.peerreviewedyespor
dc.publisherEuropean Commissionpor
dc.relation.publisherversionhttp://bookshop.europa.eu/pt/proceedings-of-the-fifth-european-conference-on-underwater-acoustics.-ecua-2000-volume-2-pbKINO19333/por
dc.subjectUnderwater acousticspor
dc.subjectTime-reversal mirrorpor
dc.titleUnderwater acoustic communication using a time-reversal mirror approachpor
dc.typebook part
dspace.entity.typePublication
oaire.citation.conferencePlaceLyonpor
oaire.citation.endPage536por
oaire.citation.startPage531por
oaire.citation.titleECUA 2000por
oaire.citation.volume1por
person.familyNameSilva
person.familyNameJesus
person.givenNameAntónio
person.givenNameSergio
person.identifier.ciencia-idEB17-11D8-E7BD
person.identifier.orcid0000-0002-1724-7777
person.identifier.orcid0000-0002-6021-1761
person.identifier.ridN-6554-2013
person.identifier.scopus-author-id55846463600
person.identifier.scopus-author-id7003729485
rcaap.rightsopenAccesspor
rcaap.typebookPartpor
relation.isAuthorOfPublication564df7bf-2e6e-46bf-a80b-d37570d3b78d
relation.isAuthorOfPublicatione0226ece-3767-4beb-ab80-868e8897c14a
relation.isAuthorOfPublication.latestForDiscovery564df7bf-2e6e-46bf-a80b-d37570d3b78d

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