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Passive time reversal probe-signal capture optimization for underwater communications

2007Book part Open access
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dc.contributor.authorSilva, A.
dc.contributor.authorJesus, S. M.
dc.contributor.authorGomes, João
dc.date.accessioned2014-10-10T14:17:13Z
dc.date.available2014-10-10T14:17:13Z
dc.date.issued2007
dc.description.abstractPassive Time Reversal (pTR) is an emerging technique for underwater communications where a channel probe is sent ahead of the data packet. The channel probe must be captured in a time window for post crosscorrelation with the data. The Signal to Noise Ratio (SNR) of pTR, and hence the detector error rate, will be dependent on the starting point and duration of this time window. Typically the beginning and length of the time window should depend on the time dispersion of the acoustic channel which, in turn, depends on the environment properties and on the experimental geometry. Heuristic reasoning would suggest that if a short time window fails to include all significant multipath it will result in imperfect focusing, while an overly long window will reduce the efficiency of the communication system by introducing additional noise in the pTR system. That problem calls for an optimization that has previously been addressed only heuristically. In order to bring the pTR capabilities to a practical modem the engineering problem of time window automatic optimisation must be solved, and that is the main purpose of our paper. An expression for the optimal pTR SNR time window length is presented and its validity confirmed with simulations and real data from the INTIFANTE’00 sea trial.por
dc.identifier.citationA.J. SILVA, S.M. JESUS and J.P. GOMES, ``Passive Time Reversal Probe-Signal Capture Optimization for Underwater Communications'' in Proceedings of the Underwater Acoustic Measurements, pp. 1371-1376, Heraklion, Greece.por
dc.identifier.otherAUT: SJE00662; ASI00912;
dc.identifier.urihttp://hdl.handle.net/10400.1/5266
dc.language.isoengpor
dc.peerreviewedyespor
dc.subjectAcoustic time reversalpor
dc.subjectUnderwater coherent communicationspor
dc.subjectShallow water propagationpor
dc.titlePassive time reversal probe-signal capture optimization for underwater communicationspor
dc.typebook part
dspace.entity.typePublication
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/Orçamento de Funcionamento%2FPOSC/POSI%2FCPS%2F47824%2F2002/PT
oaire.citation.conferencePlaceHeraklionpor
oaire.citation.endPage1376por
oaire.citation.startPage1371por
oaire.citation.titleUnderwater Acoustic Measurementspor
oaire.fundingStreamOrçamento de Funcionamento/POSC
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
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsopenAccesspor
rcaap.typebookPartpor
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relation.isAuthorOfPublicatione0226ece-3767-4beb-ab80-868e8897c14a
relation.isAuthorOfPublication.latestForDiscovery564df7bf-2e6e-46bf-a80b-d37570d3b78d
relation.isProjectOfPublicationc547072d-275f-4347-8ae5-9e87d222942d
relation.isProjectOfPublication.latestForDiscoveryc547072d-275f-4347-8ae5-9e87d222942d

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