Design and implementation of efficient IIR notch filters with quantization error feedback

Author

Laakso, Timo I. ; Ranta, Jari ; Ovaska, Seppo J.

Volume

43

Issue

3

fYear

1994

fDate

6/1/1994 12:00:00 AM

Firstpage

449

Lastpage

456

Abstract

Straightforward methods for the design of digital notch filters are presented. The design method is based on setting a zero of the filter at a notch frequency and placing a pole in its neighborhood such that the notch width is narrow enough while keeping the group delay of the filter sufficiently flat. A technique for efficient and well-behaved implementation with fixed-point signal processors is advanced, based on the use of quantization error feedback for roundoff noise reduction. The design approach is illustrated with numerical examples, and an assembly-language program for the family of TMS320 signal processors is provided

Keywords

circuit CAD; digital filters; feedback; notch filters; signal processing; signal processing equipment; IIR notch filters; TMS320 signal processors; assembly-language program; cascading; design; digital notch filters; fixed-point signal processors; group delay; multiplying delays; notch frequency; notch width; numerical examples; quantization error feedback; roundoff noise reduction; zero; Delay; Design methodology; Digital filters; Feedback; Frequency; IIR filters; Noise reduction; Poles and zeros; Quantization; Signal processing;

fLanguage

English

Journal_Title

Instrumentation and Measurement, IEEE Transactions on

Publisher

ieee

ISSN

0018-9456

Type

jour

DOI

10.1109/19.293466

Filename

293466