Method for detecting acoustic signals from an underwater source

Details Method for detecting acoustic signals from an underwater source Method for detecting acoustic signals from an underwater source

1996-07-09

1997-09-16

Pihulic, Daniel T.

Communications, electrical: acoustic wave systems and devices

Receiver circuitry

367 98, 367131, H04B 106

Patent

active

056687788

ABSTRACT:
A method for detecting radiated and reflected acoustic signals from an unwater source, wherein the acoustic signals are present in a random noise environment and form an output therewith. The method includes the steps of operating an entropy-based acoustic receiver to receive the output, calculating the entropy of the received output, and comparing the calculated entropy with a selected entropy threshold value. A substantial difference is indicative of the presence of an acoustic signal from an underwater source. A less than substantial difference is indicative of a lack of presence of an acoustic signal from an underwater source.

REFERENCES:
patent: 5243686 (1993-09-01), Tokuda et al.

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