Title :
A simplified tuning algorithm for FIR digital filters using subband decomposition
Author :
Lautenschläger, Stefan ; Mitra, Sanjit K.
Author_Institution :
Dept. of Electr. & Comput. Eng., California Univ., Santa Barbara, CA, USA
Abstract :
Simplifying methods for tuning the frequency response of FIR digital filters realized using the structural subband decomposition are described. Based on numerous optimal filter designs, a linear approximation for the filter coefficients as a function of the cutoff frequency has been derived. In many cases, a number of filter coefficients can be replaced with zero values without significantly altering the frequency response characteristics. The frequency response of the filters are variable within narrow frequency ranges around the nominal cutoff frequency. The proposed methods do not change the filter length since the filter coefficients are directly controlled
Keywords :
FIR filters; digital filters; filtering theory; frequency response; tuning; FIR digital filters; cutoff frequency; filter coefficients; filter length; frequency response; linear approximation; optimal filter designs; subband decomposition; tuning algorithm; Cutoff frequency; Digital filters; Filtering; Finite impulse response filter; Frequency response; Linear approximation; Matrix decomposition; Nonlinear filters; Transfer functions; Tuning;
Conference_Titel :
Signals, Systems and Computers, 1993. 1993 Conference Record of The Twenty-Seventh Asilomar Conference on
Conference_Location :
Pacific Grove, CA
Print_ISBN :
0-8186-4120-7
DOI :
10.1109/ACSSC.1993.342543
