Design of sharp FIR filters with prescribed group delay

Author

Lee, Ju-Hong ; Chen, Charng-Kann

Author_Institution

Dept. of Electr. Eng., Nat. Taiwan Univ., Taipei, Taiwan

fYear

1993

fDate

3-6 May 1993

Firstpage

92

Abstract

A method for synthesizing a sharp finite impulse response (FIR) digital filter with prescribed group delay is proposed. In general, the filter length of an FIR filter is inversely proportional to its transition width. Hence, for a sharp linear phase FIR filter the complexity would be very high and the group delay would be very large. Based on a weighted least squares (WLS) algorithm, the frequency response masking approach is extended to the complex domain in order to significantly reduce the required complexity and group delay for synthesizing a sharp FIR filter. The effectiveness of the proposed method is demonstrated by design examples

Keywords

FIR filters; computational complexity; digital filters; frequency response; least squares approximations; complexity; filter length; frequency response masking approach; prescribed group delay; sharp FIR filters; transition width; weighted least squares; Algorithm design and analysis; Band pass filters; Bandwidth; Delay lines; Digital filters; Finite impulse response filter; Least squares approximation; Least squares methods; Nonlinear filters; Stability;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems, 1993., ISCAS '93, 1993 IEEE International Symposium on

Conference_Location

Chicago, IL

Print_ISBN

0-7803-1281-3

Type

conf

DOI

10.1109/ISCAS.1993.393665

Filename

393665