1 Ocak 2006 Dergi makalesi Açık Erişim

Sabra, Karim G.; Roux, Philippe; Song, Hee-Chun; Hodgkiss, William S.; Kuperman, W. A.; Akal, Tuncay; Stevenson, J. Mark

Citation Style Language JSON

{
  "DOI": "10.1121/1.2227377", 
  "abstract": "For most shallow water waveguides, the backscattered energy measured in a monostatic configuration is dominated by ocean bottom reverberation. A selected time-gated portion of the measured reverberation signal is used to provide a transfer function between a time-reversal array and a corresponding range interval on the bottom. Ultrasonic and at-sea experiments demonstrate the focusing capabilities of a time-reversal array along the rough bottom interface using these reverberation signals only. The iterative time-reversal technique facilitates robust focusing along the ocean bottom, with little signal processing effort involved and a priori information of the environment. This allows for enhanced detection and localization of proud or buried targets in complex shallow water environments. A passive implementation of the iterative time-reversal processing is used to construct reflectivity maps, similar to a sonar map, but with an enhanced contrast for the strongest reflectors (or scatterers), at the water-bottom interface. Ultrasonic and at-sea experiments show that targets on the seafloor located up to 400 wavelengths from a time-reversal array are detectable in the presence of bottom reverberation. (c) 2006 Acoustical Society of America.", 
  "author": [
    {
      "family": "Sabra", 
      "given": " Karim G."
    }, 
    {
      "family": "Roux", 
      "given": " Philippe"
    }, 
    {
      "family": "Song", 
      "given": " Hee-Chun"
    }, 
    {
      "family": "Hodgkiss", 
      "given": " William S."
    }, 
    {
      "family": "Kuperman", 
      "given": " W. A."
    }, 
    {
      "family": "Akal", 
      "given": " Tuncay"
    }, 
    {
      "family": "Stevenson", 
      "given": " J. Mark"
    }
  ], 
  "container_title": "JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA", 
  "id": "95075", 
  "issue": "3", 
  "issued": {
    "date-parts": [
      [
        2006, 
        1, 
        1
      ]
    ]
  }, 
  "page": "1305-1314", 
  "title": "Experimental demonstration of iterative time-reversed reverberation focusing in a rough waveguide. Application to target detection", 
  "type": "article-journal", 
  "volume": "120"
}