1 Ocak 2009 Dergi makalesi Açık Erişim

Song, H. C.; Hodgkiss, W. S.; Kuperman, W. A.; Akal, T.; Stevenson, M.

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  <identifier identifierType="URL">https://aperta.ulakbim.gov.tr/record/95093</identifier>
  <creators>
    <creator>
      <creatorName>Song, H. C.</creatorName>
      <givenName>H. C.</givenName>
      <familyName>Song</familyName>
      <affiliation>Univ Calif San Diego, Scripps Inst Oceanog, La Jolla, CA 92093 USA</affiliation>
    </creator>
    <creator>
      <creatorName>Hodgkiss, W. S.</creatorName>
      <givenName>W. S.</givenName>
      <familyName>Hodgkiss</familyName>
      <affiliation>Univ Calif San Diego, Scripps Inst Oceanog, La Jolla, CA 92093 USA</affiliation>
    </creator>
    <creator>
      <creatorName>Kuperman, W. A.</creatorName>
      <givenName>W. A.</givenName>
      <familyName>Kuperman</familyName>
      <affiliation>Univ Calif San Diego, Scripps Inst Oceanog, La Jolla, CA 92093 USA</affiliation>
    </creator>
    <creator>
      <creatorName>Akal, T.</creatorName>
      <givenName>T.</givenName>
      <familyName>Akal</familyName>
      <affiliation>Earth &amp; Marine Sci Res Inst, Marmara Res Ctr, TUBITAK MAN, Kocaeli, Turkey</affiliation>
    </creator>
    <creator>
      <creatorName>Stevenson, M.</creatorName>
      <givenName>M.</givenName>
      <familyName>Stevenson</familyName>
      <affiliation>Spawar Syst Ctr, San Diego, CA 92152 USA</affiliation>
    </creator>
  </creators>
  <titles>
    <title>High-Rate Synthetic Aperture Communications In Shallow Water</title>
  </titles>
  <publisher>Aperta</publisher>
  <publicationYear>2009</publicationYear>
  <dates>
    <date dateType="Issued">2009-01-01</date>
  </dates>
  <resourceType resourceTypeGeneral="Text">Journal article</resourceType>
  <alternateIdentifiers>
    <alternateIdentifier alternateIdentifierType="url">https://aperta.ulakbim.gov.tr/record/95093</alternateIdentifier>
  </alternateIdentifiers>
  <relatedIdentifiers>
    <relatedIdentifier relatedIdentifierType="DOI" relationType="IsIdenticalTo">10.1121/1.3257184</relatedIdentifier>
  </relatedIdentifiers>
  <rightsList>
    <rights rightsURI="http://www.opendefinition.org/licenses/cc-by">Creative Commons Attribution</rights>
    <rights rightsURI="info:eu-repo/semantics/openAccess">Open Access</rights>
  </rightsList>
  <descriptions>
    <description descriptionType="Abstract">Time reversal communication exploits spatial diversity to achieve spatial and temporal focusing in complex ocean environments. Spatial diversity can be provided easily by a vertical array in a waveguide. Alternatively, spatial diversity can be obtained from a virtual horizontal array generated by two elements, a transmitter and a receiver, due to relative motion between them, referred to as a synthetic aperture. This paper presents coherent synthetic aperture communication results from at-sea experiments conducted in two different frequency bands: (1) 2-4 kHz and (2) 8-20 kHz. Case (1) employs binary-phase shift-keying modulation, while case (2) involves up to eight-phase shift keying modulation with a data rate of 30 kbits/s divided by the number of transmissions (diversity) to be accumulated. The receiver utilizes time reversal diversity combining followed by a single channel equalizer, with frequent channel updates to accommodate the time-varying channel due to coupling of space and time in the presence of motion. Two to five consecutive transmissions from a source moving at 4 kts over 3-6 km range in shallow water are combined successfully after Doppler compensation, confirming the feasibility of coherent synthetic aperture communications using time reversal.</description>
  </descriptions>
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