Accession Number : ADD017324

Title :   Advanced Signal Processing Filter.

Descriptive Note : Patent Application, filed 30 Sep 94,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Wagstaff, Ronald A

PDF Url : ADD017324

Report Date : 30 Sep 1994

Pagination or Media Count : 22

Abstract : A filter, and method of the filtering, for increasing the signal to noise ratio of relatively small and constant amplitude signals in the presence of relatively large and varying amplitude signals. The filter produces a filtered power level az proportional to az = (Sum of xi(-z) from i=1 to N)(-1/z) where x1 are power realizations of the signal in a selected frequency bin, and i = 1, 2, . . ., N, and z is a non-zero real number not equal to -1, 0, or 1, and is preferably positive. For positive z, because filtered power level a2 depends on a sum of xi(-z), sum az disproportionately favors smaller, more stable, signals. (AN)

Descriptors :   *SIGNAL PROCESSING, *ACOUSTIC FILTERS, DATA PROCESSING, POWER LEVELS, PATENT APPLICATIONS, SIGNAL TO NOISE RATIO, TIME SERIES ANALYSIS, FAST FOURIER TRANSFORMS, IMPULSE NOISE, ANALOG TO DIGITAL CONVERTERS, AMPLITUDE, UNDERWATER ACOUSTICS, BANDPASS FILTERS, SONAR SIGNALS, SONOBUOYS

Subject Categories : Acoustic Detection and Detectors

Distribution Statement : APPROVED FOR PUBLIC RELEASE