×

Adaptive predictor of surface reverberation in a bistatic sonar

  • US 4,654,835 A
  • Filed: 07/20/1984
  • Issued: 03/31/1987
  • Est. Priority Date: 07/20/1984
  • Status: Expired due to Term
First Claim
Patent Images

1. An active sonar system adapted to detect a target in a sonar convergence zone in the presence of surface reverberation, comprising:

  • primary transducer means for receiving acoustic energy and providing primary transducer signals;

    reference transducer means for receiving acoustic energy and providing reference transducer signals, said reference transducer means spatially separated from said primary transducer means by a sufficient distance that surface reverberation components of the primary and reference transducer signals are substantially uncorrelated; and

    sonar processor responsive to said primary and reference transducer signals to detect a target in said sonar convergence zone in the presence of surface reverberation, said processor comprising means responsive only to correlated components of said primary and reference transducer signals to provide a "target present" indication only when the signal power in said correlated components of said reference signal exceeds a predetermined threshold.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×