Echo simulator for active sonar

Details Echo simulator for active sonar Echo simulator for active sonar

1997-10-09

1998-10-27

Pihulic, Daniel T.

Communications, electrical: acoustic wave systems and devices

Testing, monitoring, or calibrating

H04B 1700

Patent

active

058286250

ABSTRACT:
A target echo simulator with reverberation and ambient noise for testing an ctive sonar system. A transmit enable pulse from a sonar transmitter establishes a sequence of operations in which a target echo generator, reverberation generator and ambient noise generator produce a composite signal. The target echo generator produces a pulse modulated output pulse of a characteristic sonar frequency. The reverberation generator produces an amplitude modulating or envelope controlled output at a frequency of a carrier that is offset from the target echo carrier frequency. An ambient noise generator constantly produces ambient noise. A summing amplifier combines the generated signals to produce a composite signal for transfer to a receive connection on the active sonar system.

REFERENCES:
patent: 4250634 (1981-02-01), Buckler
patent: 4908800 (1990-03-01), Dilemmo
patent: 4972379 (1990-11-01), Harris, Jr.
patent: 4972381 (1990-11-01), Mitchell et al.

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