FIR filters using interpolated prefilters and equalizers

Author

Cabezas, Julio C E ; Diniz, Paulo S R

Author_Institution

Program of Electr. Eng., Federal Univ. of Rio de Janeiro, Brazil

Volume

37

Issue

1

fYear

1990

fDate

1/1/1990 12:00:00 AM

Firstpage

17

Lastpage

23

Abstract

Novel digital FIR (finite-impulse-response) prefilter structures with periodic impulse response are introduced. The prefilter consists of an interpolated recursive running sum coupled to a nonrecursive structure. By appropriately cascading these prefilters, large stopband attenuation can be obtained, relieving the task of the equalizer. A systematic design procedure for the cascade of prefilters and the equalizer is given, leading to computationally efficient FIR filters. The procedure is based on combining the prefilter-equalizer concepts of J.W. Adams and A.N. Wilson, Jr. (1983) with the IFIR (interpolated FIR) concepts of Y. Neuvo et al. (1987). Design examples are included, demonstrating that the proposed design procedure leads to significant savings in the number of arithmetic operations as compared to recently proposed designs

Keywords

cascade networks; digital filters; interpolation; network synthesis; FIR filters; cascading; design procedure; digital filters; equalizers; finite-impulse-response; interpolated prefilters; interpolated recursive running sum; nonrecursive structure; periodic impulse response; stopband attenuation; Adders; Arithmetic; Band pass filters; Digital filters; Equalizers; Finite impulse response filter; Frequency; Interpolation; Narrowband; Resonator filters;

fLanguage

English

Journal_Title

Circuits and Systems, IEEE Transactions on

Publisher

ieee

ISSN

0098-4094

Type

jour

DOI

10.1109/31.45687

Filename

45687