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Experimental assessment of time-reversed OFDM underwater communications

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dc.contributor.authorGomes, J.
dc.contributor.authorSilva, A.
dc.contributor.authorJesus, S. M.
dc.date.accessioned2014-10-07T10:18:43Z
dc.date.available2014-10-07T10:18:43Z
dc.date.issued2008
dc.description.abstractOFDM communication has recently been demonstrated in underwater channels at rates of 10-30 kbps. This is a popular modulation in radio communications due to its spectral exibility and the simplicity of FFT-based transmitters/receivers. Despite widespread interest, experimental data on the performance of underwater OFDM are still scarce. This work aims to contribute to a better understanding of the potential of this technique by examining results from the UAB'07 experiment, which was conducted in Norway, in September 2007. Modulated data were transmitted in a fjord using several formats with bandwidths of 1.5 and 4.5 kHz, and recorded at a range of about 800 m in a 16-hydrophone array. Signi cant multipath was observed over a period of at least 30 ms, which would call for a large OFDM pre x and hence drastically reduce the data rate. Passive time reversal is used here as a computationally inexpensive preprocessing scheme to shorten the e ective channel length to less than 10 ms, so that moderate guard intervals can be used with a conventional OFDM receiver architecture. The same marker signals used for packet synchronization and Doppler compensation are reused as channel probes for passive time reversal, so the latter entails no loss in e ciency.por
dc.description.sponsorshipThis work was supported by Fundação para a Ciência e a Tecnologia through project PTDC/EEA-TEL/71263/2006 and ISR/IST plurianual funding.por
dc.identifier.citationJ.P. GOMES, A. SILVA and S.M. JESUS, ''Experimental assessment of time-reversed OFDM underwater communications'', Proc. ACOUSTICS'08, Paris, France, June, joint with The Acoustical Society of America, Vol.123 (issue 5), pp. 5340-5344, (doi:10.1121/1.2935841).por
dc.identifier.doihttp://dx.doi.org/10.1121/1.2935841
dc.identifier.otherAUT: SJE00662; ASI00912;
dc.identifier.urihttp://hdl.handle.net/10400.1/5201
dc.language.isoengpor
dc.peerreviewedyespor
dc.publisherSociété Française d'Acoustique; Acoustical Society of America; Euronoisepor
dc.titleExperimental assessment of time-reversed OFDM underwater communicationspor
dc.typebook part
dspace.entity.typePublication
oaire.citation.conferencePlaceParispor
oaire.citation.endPage5344por
oaire.citation.startPage5340por
oaire.citation.titleProceedings ACOUSTICS'08por
oaire.citation.volume123por
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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