Shallow water beamforming methodology for toroidal volume search

Details Shallow water beamforming methodology for toroidal volume search Shallow water beamforming methodology for toroidal volume search

1997-06-05

1998-07-14

Pihulic, Daniel T.

Communications, electrical: acoustic wave systems and devices

Echo systems

Side scanning or contour mapping sonar systems

367103, 367 12, G01S 1589

Patent

active

057815046

ABSTRACT:
An apparatus and method for beamforming for a toroidal volume search sonar. onar array vehicle motion is used to reduce reverberation by fixing beams geometrically in space to prevent beam contact, prior to a specified range, with the sea surface or sea bottom interfaces. Reverberation is further reduced by creating a composite beam from one scanned beam containing the target dominated by surface reverberation and another dominated by bottom reverberation. A correlation and averaging procedure is applied to the two scanned beams to further reduce the reverberation in the composite beam. To further reduce reverberation, the two beams selected for correlation and averaging processing are chosen such that the number of common elements associated with the two beams is a minimum within a given angular separation.

REFERENCES:
patent: 5506812 (1996-04-01), Zehner

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