Scanning beamformer for a very high resolution circular arc sona

Details Scanning beamformer for a very high resolution circular arc sona Scanning beamformer for a very high resolution circular arc sona

1981-06-24

1983-11-01

Farley, Richard A.

Communications, electrical: acoustic wave systems and devices

Distance or direction finding

With beam steering, scanning, or focussing

367122, G01S 382

Patent

active

044133324

ABSTRACT:
A high resolution scanning beamformer for a soundhead having a circular or a cylindrical array of hydrophones uses charge coupled devices as transversal filters in a plurality of first stage quadrature sampled phase shift steered beamforming modules. In a second stage, serial-in/serial-out charge coupled devices are used to correct for fill time. The sonar focuses at all nearfield ranges of interest by controllably varying a clocking rate.

REFERENCES:
patent: 3370267 (1968-02-01), Barry
patent: 4152678 (1979-05-01), Shott et al.
patent: 4233678 (1980-11-01), Brady
White et al., Sonar Signal Processing With CCD's, U.S. Dept. of Commerce, tional Tech. Information Services, May 1974, pp. 7-1 through 7-19.
Grace et al., Acous. Soc. of Amer., vol. 24, No. 5 1968, pp. 1453-1454.
Grace et al., Acous. Soc. of Amer., vol. 48, No. 6 Part 1, 1969, pp. 1311-1318.

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