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

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      {
        "name": "Sabra, Karim G."
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      {
        "name": "Roux, Philippe"
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      {
        "name": "Song, Hee-Chun"
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      {
        "name": "Hodgkiss, William S."
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      {
        "name": "Kuperman, W. A."
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      {
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    "description": "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.", 
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      "issue": "3", 
      "pages": "1305-1314", 
      "title": "JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA", 
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    "title": "Experimental demonstration of iterative time-reversed reverberation focusing in a rough waveguide. Application to target detection"
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