STATIONARY PROBABILITY INTEGRATOR SYSTEM

Assignee

Filed

Mar 26, 1969

Granted

Apr 16, 1991

Location

Abstract

A stationary probability integrator system for facilitating spectral anals of detected signals by suppressing random frequency background noise, such as ocean disturbances and marine life, and by enhancing spectral signatures of discrete sound sources, such as generated by submarines in water. A raw 0 to 100 Hertz frequency spectrum of noise and spectral signature from a frequency analyzer having 500 increments or elements is divided into ten assemblies of 50 elements per ensemble. The ensemble averages, which are the average simultaneous energy levels of all elements in respective ensembles, of each sample is negatively combined with the energy level of each element of the corresponding ensemble of the next consecutive raw sample. Each combination and the cumulative algebraic sum of each combination is then displayed in the same frequency spectrum as the samples. The cumulative energy levels of background noise elements will be substantially zero, while the cumulative energy levels of spectral signature elements will build up in a positive direction to an extent limited only by the display's capability. Thus, pronounced spectral signatures of discrete underwater sound sources is presented.

Source: Google Patents