Accession Number : ADD018117

Title :   Enhanced Adaptive Statistical Filter Providing Improved Performance for Target Motion Analysis Noise Discrimination.

Descriptive Note : Patent, Filed 22 Sep 93, patented 16 Jul 96,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : O'Brien, Francis J , Jr ; Graham, Marcus L ; Gong, Kai F ; Hammel, Sherry E

Report Date : 16 Jul 1996

Pagination or Media Count : 6

Abstract : An adaptive statistical filter system for receiving a data stream comprising a series of data values from a sensor associated with successive points in time. Each data value includes a data component representative of the motion of a target and a noise component, with the noise components of data values associated with proximate points in time being correlated. The adaptive statistical filter system includes a pre-whitener module, a plurality of statistical filters of different orders and a selection module. The prewhitener module receives the data stream from the sensor and generates a corrected data stream comprising a series of corrected data values each associated with a data value of the data stream, each including a data component and a noise component with the noise components of data values associated with proximate points in time being decorrelated. The plural statistical filters are coupled to receive the corrected data stream in parallel from the pre-whitener. Each statistical filter generates coefficient values to fit the corrected data stream to a polynomial of corresponding order and fit values representative of the degree of fit of corrected data stream to the polynomial. The selection module receives the fit values and coefficient values from the plural statistical filters and selects coefficient values from one of the filters in response to the fit values. The coefficient values are coupled to target motion analysis module which determines position and velocity of the target.

Descriptors :   *PATENTS, SIGNAL PROCESSING, COUPLING(INTERACTION), DATA PROCESSING, MODULAR CONSTRUCTION, ADAPTIVE FILTERS, STATISTICAL ANALYSIS, NOISE REDUCTION, CORRECTIONS

Subject Categories : Cybernetics

Distribution Statement : APPROVED FOR PUBLIC RELEASE