High resolution phase shifter beamformer for a cylindrical array

Details High resolution phase shifter beamformer for a cylindrical array High resolution phase shifter beamformer for a cylindrical array

1978-04-10

1979-09-04

Tubbesing, T. H.

Communications, electrical: acoustic wave systems and devices

Echo systems

Distance or direction finding

367122, G01S 380

Patent

active

041669991

ABSTRACT:
A digital beamformer for use with a cylindrical sonar array effects sequeal quadrature pair sampling of the outputs of M array elements used to form each beam, the resulting X and Y samples being digitized and fed alternatively to two serial-in, parallel out shift registers having M stages. M shading modules are responsive to the digitized element output samples in the corresponding stages of the two shift registers to alternately provide M shaded X and Y outputs. A multiple layer digital adder tree sums pairs of adjacent shaded X outputs and adjacent shaded Y outputs to provide the final beamformer output.

REFERENCES:
patent: 3370267 (1968-02-01), Barry
patent: 3810082 (1974-05-01), Arens
patent: 3835448 (1974-09-01), Bertheas

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