Accession Number : ADA186125

Title :   A Generalization of Order Statistic Filters: The Alpha-Trimmed Linear Filter.

Descriptive Note : Master's thesis,

Corporate Author : AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH

Personal Author(s) : Rider, Douglas B

PDF Url : ADA186125

Report Date : Jan 1987

Pagination or Media Count : 190

Abstract : With the increase in use of digital communications has come a renewed interest in nonlinear filtering techniques. In some signal processing applications the suppression of noise on a discrete-time signal sequence can not be adequately accomplished using linear filtering. In order to preserve sharp edges in a signal while still smoothing noise and removing impulsive components requires some type of nonlinear or adaptive filtering. The most common nonlinear smoother to be investigated is the median filter. In this filter the median is taken from a finite length window of values surrounding the input value. This scheme has been shown to preserve edges in signals with a minimum of distortion and is resistant to outliers in the data. However, it often does not provide adequate smoothing of noise that is not by nature impulsive. Yet the desirable properties of median filtering make it worth investigating.

Descriptors :   *LINEAR FILTERING, ADAPTIVE FILTERS, DISCRETE DISTRIBUTION, DISTORTION, EDGES, INPUT, NOISE, NONLINEAR SYSTEMS, SEQUENCES, SHARPNESS, SIGNAL PROCESSING, SIGNALS, SUPPRESSION, TIME, WINDOWS, DIGITAL COMMUNICATIONS, TRANSFER FUNCTIONS

Subject Categories : Statistics and Probability
      Radio Communications

Distribution Statement : APPROVED FOR PUBLIC RELEASE