Repository logo
 
Publication

Arrival-based equalizer for underwater communication systems

2012Conference object Open access
Simple item page
dc.contributor.authorIjaz, S.
dc.contributor.authorSilva, A.
dc.contributor.authorJesus, S. M.
dc.date.accessioned2014-10-06T13:35:47Z
dc.date.available2014-10-06T13:35:47Z
dc.date.issued2012
dc.description.abstractOne of the challenges in the present underwater acoustic communication systems is to combat the underwater channel effects which results in time and frequency spreading of the transmitted signal. The time spreading is caused by the multipath effect while the frequency spreading is due to the time variability of the underwater channel. The passive Time Reversal (pTR) equalizer has been used in underwater communications because of its time focusing property which minimizes the time spreading effect of the underwater channel. In order to compensate for the frequency spreading effect, an improved version of pTR was proposed, called Frequency shift passive time reversal (FSpTR). FSpTR tries to compensate for the frequency spreading by applying a frequency shift in the estimated channel impulse response (IR). In the multipath environment, multiple replicas of the transmitted signal reaches the receiver through different paths where each path is affected differently by environmental variations. In such cases, a single frequency shift fails to compensate for the environmental variations on each path, resulting in degradation in the performance. In this paper, an arrival-based equalizer is proposed to compensate for the environmental variations on each path. The concept of beamforming is integrated with FSpTR equalizer, in this paper, to compensate each arrival separately for the environmental variations. The proposed equalizer is tested with the real data and the results showed that the proposed approach outperforms pTR and FSpTR equalizers and provides a mean MSE gain of 4.9 dB and 4.2 dB respectively.por
dc.description.sponsorshipThis work is supported by Portuguese Foundation for Science Technology under PHITOM (PTDC/EEATEL/71263/2006) and COGNAT (PTDC/MAR/112446/2009) projects. This work was also supported by European Community’s Sixth Framework Program through the grant to the budget of the Integrated Infrastructure Initiative HYDRALAB III within the Transnational Access Activities, Contract no. 022441.por
dc.identifier.citationS. IJAZ, A. SILVA and S.M. JESUS, ''Arrival-Based Equalizer for Underwater Communication Systems'', UCOMMS'12 Conference, Sestri Levante (Italy), September.por
dc.identifier.otherAUT: ASI00912; SJE00662;
dc.identifier.urihttp://hdl.handle.net/10400.1/5192
dc.language.isoengpor
dc.peerreviewedyespor
dc.publisherNATO STO Centre for Maritime Research and Experimentationpor
dc.relationCOGNAT - Cooperative Gliger Navigation and Acoustic Tomography
dc.subjectUnderwater communicationpor
dc.subjectPassive time reversal equalizerpor
dc.subjectFrequency shift passive time equalizerpor
dc.subjectGeometric variationspor
dc.subjectDopplerpor
dc.subjectBeamformingpor
dc.titleArrival-based equalizer for underwater communication systemspor
dc.typeconference object
dspace.entity.typePublication
oaire.awardTitleCOGNAT - Cooperative Gliger Navigation and Acoustic Tomography
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/5876-PPCDTI/PTDC%2FMAR%2F112446%2F2009/PT
oaire.citation.conferencePlaceSestri Levante (Italy)por
oaire.citation.endPage10por
oaire.citation.startPage1por
oaire.citation.titleUCOMMS'12por
oaire.fundingStream5876-PPCDTI
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.typeconferenceObjectpor
relation.isAuthorOfPublication564df7bf-2e6e-46bf-a80b-d37570d3b78d
relation.isAuthorOfPublicatione0226ece-3767-4beb-ab80-868e8897c14a
relation.isAuthorOfPublication.latestForDiscoverye0226ece-3767-4beb-ab80-868e8897c14a
relation.isProjectOfPublication3b83a011-a2a9-4ff0-989d-1a2e5f400792
relation.isProjectOfPublication.latestForDiscovery3b83a011-a2a9-4ff0-989d-1a2e5f400792

Files

Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
Arrival-based equalizer for underwater communication systems.pdf
Size:
1.36 MB
Format:
Adobe Portable Document Format
Download
License bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
license.txt
Size:
3.68 KB
Format:
Item-specific license agreed upon to submission
Description:
Download

Collections

FCT4-Vários