1 Ocak 2009 Dergi makalesi Açık Erişim

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

Dublin Core

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  <dc:creator>Song, H. C.</dc:creator>
  <dc:creator>Hodgkiss, W. S.</dc:creator>
  <dc:creator>Kuperman, W. A.</dc:creator>
  <dc:creator>Akal, T.</dc:creator>
  <dc:creator>Stevenson, M.</dc:creator>
  <dc:date>2009-01-01</dc:date>
  <dc:description>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.</dc:description>
  <dc:identifier>https://aperta.ulakbim.gov.trrecord/95093</dc:identifier>
  <dc:identifier>oai:zenodo.org:95093</dc:identifier>
  <dc:rights>info:eu-repo/semantics/openAccess</dc:rights>
  <dc:rights>http://www.opendefinition.org/licenses/cc-by</dc:rights>
  <dc:source>JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA 126(6) 3057-3061</dc:source>
  <dc:title>High-rate synthetic aperture communications in shallow water</dc:title>
  <dc:type>info:eu-repo/semantics/article</dc:type>
  <dc:type>publication-article</dc:type>
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