FIR filter design over discrete coefficients and least square error

Author

Dam, H.H. ; Nordebo, S. ; Teo, K.L. ; Cantoni, A.

Author_Institution

Australian Telecommun. Res. Inst., Curtin Univ. of Technol., Perth, WA, Australia

Volume

147

Issue

6

fYear

2000

fDate

12/1/2000 12:00:00 AM

Firstpage

543

Lastpage

548

Abstract

The difference routing digital filter (DRDF) consists of an FIR filter followed by a first-order integrator. This structure with power-of-two coefficients has been studied as a means of achieving low complexity, high sampling rate filters which can be implemented efficiently in hardware. The optimisation of the coefficients has previously been based on a time-domain least-squares error criterion. A new design method is proposed that includes a frequency-domain least-squares criterion with arbitrary frequency weighting and an improved method for handling quantisation of the filter coefficients. Simulation studies show that the new approach yields an improvement of up to 7 dB over existing methods and that oversampling can be used to improve performance

Keywords

FIR filters; circuit optimisation; computational complexity; least squares approximations; signal sampling; time-domain synthesis; DRDF; FIR filter design; difference routing digital filter; discrete coefficients; filter coefficients; first-order integrator; frequency weighting; frequency-domain least-squares criterion; least square error; low complexity, high sampling rate filters; optimisation; oversampling; power-of-two coefficients; quantisation;

fLanguage

English

Journal_Title

Vision, Image and Signal Processing, IEE Proceedings -

Publisher

iet

ISSN

1350-245X

Type

jour

DOI

10.1049/ip-vis:20000598

Filename

903323