Canonic look ahead: critical cycle relaxed IIR filtering with minimum multiplicative complexity

Author

Rubio, J. ; Sala, J. ; Nunez, Felipe

Author_Institution

Dept. of Signal Theor. & Commun., Univ. Politecnica de Catalunya, Barcelona, Spain

Volume

2

fYear

2001

fDate

2001

Firstpage

1085

Abstract

In this paper we present an architecture to relax the critical cycle associated with the feedback operations in IIR filtering when high sampling frequencies exceed the computation bandwidth of digital arithmetics. Its complexity, evaluated in terms of multiplications per output sample per pole, equals that of the canonic IIR recursion and provides considerable savings in comparison to existing techniques such as clustered and scattered look ahead. The procedure is shown to yield unconditionally stable implementations

Keywords

IIR filters; circuit feedback; circuit stability; computational complexity; signal sampling; canonic IIR recursion; canonic look ahead; computation bandwidth; critical cycle relaxed IIR filtering; digital arithmetic; feedback operations; multiplicative complexity; sampling frequencies; stable implementations; Bandwidth; Computer architecture; Digital arithmetic; Digital filters; Feedback; Filtering; Frequency; IIR filters; Sampling methods; Scattering;

fLanguage

English

Publisher

ieee

Conference_Titel

Acoustics, Speech, and Signal Processing, 2001. Proceedings. (ICASSP '01). 2001 IEEE International Conference on

Conference_Location

Salt Lake City, UT

ISSN

1520-6149

Print_ISBN

0-7803-7041-4

Type

conf

DOI

10.1109/ICASSP.2001.941108

Filename

941108