Title :
Least-squares design of FIR filters as a tapped cascaded interconnection of substructures
Author_Institution :
Dept. of Inf. Technol., Tampere Univ. of Technol., Finland
Abstract :
Least-squares design of FIR filters is considered for a structure consisting of a tapped cascaded interconnection of identical subfilters. By using computationally efficient substructures, savings are achieved in the number of multiplications, as compared to direct form designs of comparable integrated squared error. Analytical formulas are derived for the optimum tap coefficients, based on the time-domain composition of the overall impulse response. Examples of linear-phase lowpass and bandpass filter design are given.
Keywords :
FIR filters; band-pass filters; least squares approximations; low-pass filters; time-domain analysis; FIR filters; bandpass filter design; comparable integrated squared error; computationally efficient substructures; impulse response; least-squares design; linear-phase lowpass filter design; optimum tap coefficients; subfilters; tapped cascaded interconnection; time-domain composition; Adders; Constraint optimization; Digital arithmetic; Digital filters; Error analysis; Finite impulse response filter; Frequency response; Information technology; Time domain analysis; Transfer functions;
Conference_Titel :
IECON 02 [Industrial Electronics Society, IEEE 2002 28th Annual Conference of the]
Print_ISBN :
0-7803-7474-6
DOI :
10.1109/IECON.2002.1185503
