Matched filter, receiving beam-forming apparatus and sonar...

Details Matched filter, receiving beam-forming apparatus and sonar... Matched filter, receiving beam-forming apparatus and sonar...

2005-01-04

2005-01-04

Lobo, Ian J. (Department: 3662)

Communications, electrical: acoustic wave systems and devices

Echo systems

Distance or direction finding

C367S119000, C367S103000

Reexamination Certificate

active

06839303

ABSTRACT:
A received beam-forming apparatus is disclosed is which echo signals received by multiple ultrasonic transducer elements arranged in a linear form are sampled at a specific scanning frequency to obtain sample data. A receiving beam-forming apparatus includes a memory which stores the sample data derived from multiple scanning cycles; and a beamformer which divides the multiple ultrasonic transducer elements into multiple blocks, reads out the sample data derived from different scanning cycles for the individual blocks from said memory, and forms a receiving beam in a specific direction using the individual sample data which have been read out. A sonar system using the receiving-beam forming apparatus is also disclosed as is a matched filter which selects an arc-shaped part of an ultrasonic transducer element array.

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patent: 2029574 (1980-03-01), None

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