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Sonar bearing estimation of extended targets

  • US 5,949,739 A
  • Filed: 08/31/1987
  • Issued: 09/07/1999
  • Est. Priority Date: 08/31/1987
  • Status: Expired due to Term
First Claim
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1. A sonar system for determining the bearing of a signal source providing a segmented signal comprising:

  • a sonar array providing a pair of offset-phase centered beams, said pair of beams being characterized as right and left phase displaced beams with respect to an axis through a phase center of said sonar array;

    said right and left beams providing a right and a left phase displaced signal, respectively, from said signal source;

    means providing a plurality of correlation products corresponding to the segments of said segmented signal of each of the right and left phase displaced sonar array output signals;

    said correlation products each containing a pair of a real and an imaginary part; and

    means determining a bearing with respect to said axis of a source of said output signals from an argument derived from at least some of said pairs of correlation products.

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