An IIR median hybrid filter

Author

Bauer, Peter H. ; Sartori, Michael A. ; Bryden, Timothy M.

Author_Institution

Dept. of Electr. Eng., Notre Dame Univ., IN, USA

Volume

40

Issue

5

fYear

1992

fDate

5/1/1992 12:00:00 AM

Firstpage

1068

Lastpage

1078

Abstract

A new class of nonlinear filters, the multidirectional infinite impulse response median hybrid (MIMH) filters, is presented and analyzed. The input signal is processed twice using a linear shift-invariant (LSI) infinite impulse response (IIR) filtering module: once with normal causality and a second time with inverted causality. The final output of the MIMH filter is the median of the two-directional outputs and the original input signal. Thus, the MIMH filter is a concatenation of linear filtering (a LSI IIR filtering module) and nonlinear filtering (a median filtering module). Because of this unique scheme, the MIMH filter possesses many desirable properties which are both proven and analyzed (including impulse removal, step preservation, and noise suppression). A comparison to other medium-type filters is also provided

Keywords

digital filters; filtering and prediction theory; IIR median hybrid filter; inverted causality; linear shift-invariant IIR filtering module; multidirectional infinite impulse response median hybrid filters; nonlinear filters; normal causality; Degradation; Filtering; Finite impulse response filter; IIR filters; Large scale integration; Maximum likelihood detection; NASA; Nonlinear filters; Signal processing; Standards development;

fLanguage

English

Journal_Title

Signal Processing, IEEE Transactions on

Publisher

ieee

ISSN

1053-587X

Type

jour

DOI

10.1109/78.134470

Filename

134470