Title :
Design of FIR first order digital differentiators of variable fractional sample delay using maximally flat error criterion
Author :
Hermanowicz, Ewa ; Rojewski, Miroslaw
Author_Institution :
Fac. of Electron., Tech. Univ. Gdansk
fDate :
1/6/1994 12:00:00 AM
Abstract :
Optimum (in a maximally flat frequency response error sense) FIR digital differentiators of variable fractional sample delay are derived that calculate the derivative of an input uniformly sampled discrete-time signal with arbitrary centre frequency at an arbitrarily chosen instant of time within each sampling interval. The proposed class of differentiators includes maximally linear differentiators for low frequencies
Keywords :
differentiating circuits; digital filters; filtering and prediction theory; frequency response; FIR first order digital differentiators; arbitrary centre frequency; frequency response error; maximally flat error criterion; maximally linear differentiators; sampling interval; uniformly sampled discrete-time signal; variable fractional sample delay;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19940009