Communications – electrical: acoustic wave systems and devices – Echo systems – Returned signal used for control
Patent
1977-05-09
1990-10-02
Tarcza, Thomas H.
Communications, electrical: acoustic wave systems and devices
Echo systems
Returned signal used for control
G01S 1508
Patent
active
049611747
ABSTRACT:
A continuous wave, doppler sonar has an underwater towed portion including projector disposed vertically displaced from a multi-element receiving array. Received CW signals are processed for spillover elimination and subjected to phase lock loop tracking filters for reverberation and target doppler prior to target signal detection, thresholding, multiplexing and transmission to the towing portion. The target signals are distributed as to azimuth, recirculated in a memory, and reiteratively displayed in PPl format, with periodic updating.
REFERENCES:
patent: 3368189 (1968-02-01), Page
patent: 3921122 (1975-11-01), Christoff
patent: 4041442 (1977-08-01), Marquardt
Christoff James T.
Teel Willis A.
Becker John
David Harvey
Pihulic Daniel T.
Sheinbein Sol
Tarcza Thomas H.
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