Accession Number:

ADD018801

Title:

System for Assessing Stochastic Properties of Signals Representing Three Items of Mutually Orthogonal Measurement Information

Descriptive Note:

Patent, Filed 17 Jan 96, patented 30 Dec 97

Corporate Author:

DEPARTMENT OF THE NAVY WASHINGTON DC

Report Date:

1997-12-30

Pagination or Media Count:

10.0

Abstract:

A signal processing system provides and processes a digital signal generated in response to an analog signal, which includes a noise component and possibly also an information component representing three mutually orthogonal items of measurement information representable as a sample point in a symbolic Cartesian three-dimensional spatial reference system. A noise likelihood determination sub-system receives the digital signal and generates a random noise assessment of whether or not the digital signal comprises solely random noise, and if not, generates an assessment of degree-of-randomness. The noise likelihood determination system controls the operation of an information processing sub-system for extracting the information component in response to the random noise assessment or a combination of the random noise assessment and the degree-of-randomness assessment. The information processing system is illustrated as combat control equipment for submarine warfare. which utilizes a sonar signal produced by a towed linear transducer array. and whose mode operation employs three orthogonally related dimensions of data. namely 1 clock time associated with the interval of time over which the sample point measurements are taken. 2 conical angle representing bearing of a passive sonar contact derived from the signal produced by the towed array. and 3 a frequency characteristic of the sonar signal.

Subject Categories:

  • Cybernetics
  • Acoustic Detection and Detectors

Distribution Statement:

APPROVED FOR PUBLIC RELEASE