Sonar doppler system with a digital adaptive filter

Details Sonar doppler system with a digital adaptive filter Sonar doppler system with a digital adaptive filter

1988-12-19

1990-04-03

Tarcza, Thomas H.

Communications, electrical: acoustic wave systems and devices

Echo systems

Speed determination

36472419, G01S 1558

Patent

active

049146394

ABSTRACT:
A doppler sonar speed measuring system incorporating a digital adaptive filter responsive to the difference in newly received raw speed data and previously received speed data to determine the amount and sign of change of the previously received data. The allowable amount of change increases to a maximum allowed value if the sign of the change remains the same on successive received data as under acceleration conditions and reduces to a minimum value when the sign changes on successive received data.

REFERENCES:
patent: 3893076 (1975-07-01), Clifford
patent: 3898878 (1975-08-01), Stallworth et al.
patent: 3908116 (1975-09-01), Bjornsen
patent: 4369444 (1983-01-01), Blumling
patent: 4580275 (1986-04-01), Pirani et al.
patent: 4608568 (1986-08-01), Egawa

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