Accession Number : ADD015324

Title :   Ping Elongator-Modulator for Realistic Echo Synthesis.

Descriptive Note : Patent, Filed 15 Jun 65, patented 29 Oct 91,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Geren, Keith E ; Routh, Claude C

Report Date : 29 Oct 1991

Pagination or Media Count : 8

Abstract : A Sonar decoy system receives an interrogating pulse from an energy source and 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.

Descriptors :   *DECOYS, *ACOUSTIC COUNTERMEASURES, *ACOUSTIC DELAY LINES, *PATENTS, DELAY, ECHOES, ENERGY, PULSES, SIGNALS, SONAR, SUBMARINES, SONAR PULSES

Subject Categories : Radio Countermeasures

Distribution Statement : APPROVED FOR PUBLIC RELEASE