Accession Number:

ADD002901

Title:

Encoded Echo-Ranging Signal Generator.

Descriptive Note:

Patent,

Corporate Author:

DEPARTMENT OF THE NAVY WASHINGTON D C

Report Date:

1976-05-18

Pagination or Media Count:

14.0

Abstract:

An object of the patent is to provide a method and means for generating a unique encoded signal that may be simultaneously used as a secure communication signal and target-ranging signal without one adversely interfering with the other. Another object is to provide a method and means for broadcasting a communication-echo-ranging sonar signal that has a random noise appearance to a casual observer or an eavesdropper not having the knowledge or the key to the encoding thereof. A further objective is to provide an improved technique for generating a controlled pseudorandom noise signal.

Subject Categories:

  • Acoustic Detection and Detectors
  • Acoustic Countermeasures
  • Non-Radio Communications

Distribution Statement:

APPROVED FOR PUBLIC RELEASE