Communications – electrical: acoustic wave systems and devices – Testing – monitoring – or calibrating
Patent
1989-05-15
1990-09-04
Tarcza, Thomas H.
Communications, electrical: acoustic wave systems and devices
Testing, monitoring, or calibrating
434 8, 434 9, H04B 1700
Patent
active
049549960
ABSTRACT:
A simulator of bottom return signals for a sonar system on a moving ship generates pulsed frequency modulated signals to simulate ocean bottom returns. Signals from the sonar transmitter are stretched in accordance with a postulated bottom configuration and applied to the frequency modulators to provide frequency modulated signals for the duration of the stretched pulses. Noise is simulated with the addition of an appropriate sinusoidal signal to each pulsed frequency modulated signal.
REFERENCES:
patent: 4168582 (1979-09-01), Heidrich
patent: 4626217 (1986-12-01), Tardif et al.
Fazzolari Luciano
Giattini Frank P.
Scoca Anthony L.
Zavacki Eugene C.
Bramson Robert S.
Cooper Albert B.
Levine Seymour
Pihulic Daniel T.
Tarcza Thomas H.
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