Beamformer having random access memory delay

Details Beamformer having random access memory delay Beamformer having random access memory delay

1980-12-10

1982-06-22

Farley, Richard A.

Communications, electrical: acoustic wave systems and devices

Distance or direction finding

With beam steering, scanning, or focussing

367126, G01S 380

Patent

active

043366074

ABSTRACT:
A device for forming beams for mulitple elements of a hydrophone array. An nalog multiplexer receiver sequentially obtains one signal from each hydrophone and supplies input voltages to an analog to digital converter. Digital words from the converter are applied to one input of a digital adder and the other adder input is from the output of a random access memory (RAM). The output of the adder is stored in the RAM at an address corresponding to the signal time delay required from a particular hydrophone in order to direct the beam of the hydrophone array in a desired direction.

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patent: 3860928 (1975-01-01), Ehrlich
patent: 3927388 (1975-12-01), Medrano
patent: 4001763 (1977-01-01), Kits van Heyningen
patent: 4031501 (1977-06-01), Caruso
patent: 4042930 (1977-08-01), Parent
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patent: 4107685 (1978-08-01), Martin et al.
patent: 4170766 (1979-10-01), Pridham et al.
patent: 4274148 (1981-06-01), van't Hullenaar

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