Ping elongator-modulator for realistic echo synthesis

Details Ping elongator-modulator for realistic echo synthesis Ping elongator-modulator for realistic echo synthesis

1965-06-15

1991-10-29

Pihulic, Daniel T.

Communications, electrical: acoustic wave systems and devices

Sonar counter-measures

434 6, H04K 300

Patent

active

050620835

ABSTRACT:
A Sonar decoy system receives an interrogating pulse from an energy source nd then distorts, elongates, amplifies, and retransmits the pulse to simulate an echo of that pulse rebounding from the various reflecting surfaces of a moving submarine. To refine the allusion of an actual echo, a portion of the pulse signal is circulated and recirculated through a delay line several times, and then reinserted into the outgoing signal to contribute random additions to and phase cancellations of the various frequency components of the signal.

REFERENCES:
patent: 2721987 (1955-10-01), Richard
patent: 2887671 (1959-05-01), Frankel et al.
patent: 2962964 (1960-11-01), Batchelder
patent: 2975396 (1961-03-01), Mueller

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