Communications – electrical: acoustic wave systems and devices – Transponders
Patent
1991-09-26
1992-06-16
Pihulic, Daniel T.
Communications, electrical: acoustic wave systems and devices
Transponders
367 13, H04B 159, H04B 1700
Patent
active
051229897
ABSTRACT:
The present invention relates to an echo repeater/beacon system for use ooard marine vessels and platforms. The system includes a hydrophone for receiving an incoming acoustic signal from a remote station, an on-board computer for analyzing, detecting, shaping, collecting and storing up to 10 seconds of a shaped version of the incoming signal for later transmission as an echo signal, and a transmitting transducer for transmitting the echo signal. The on-board computer also is used to generate a beacon signal at a desired frequency and a desired repetition rate.
REFERENCES:
patent: 3421137 (1969-01-01), Rathbun, Jr.
patent: 3555165 (1971-01-01), Ettenhofer et al.
patent: 3721949 (1973-03-01), Hubbard et al.
Brown Christopher W.
Pirie David M.
Lall Prithvi C.
McGowan Michael J.
Oglo Michael F.
Pihulic Daniel T.
The United States of America as represented by the Secretary of
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