Premium
Simultaneous amplitude and phase approximation for fir filters
Author(s) -
Leeb F.,
Henk T.
Publication year - 1989
Publication title -
international journal of circuit theory and applications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.364
H-Index - 52
eISSN - 1097-007X
pISSN - 0098-9886
DOI - 10.1002/cta.4490170306
Subject(s) - stopband , interpolation (computer graphics) , passband , amplitude , mathematics , linear phase , phase (matter) , elliptic filter , finite impulse response , mathematical analysis , control theory (sociology) , filter (signal processing) , prototype filter , low pass filter , algorithm , band pass filter , computer science , physics , optics , animation , computer graphics (images) , control (management) , quantum mechanics , artificial intelligence , computer vision
An FIR filter design method with simultaneous amplitude and phase approximation is presented. Two components are proposed in the design method: simultaneous amplitude and phase interpolation in the passband and amplitude interpolation in the stopband. These interpolations are implemented by the Remez exchange algorithm. The polynomials for the interpolations are generated by recurrence formulae and the recurrence coefficients are calculated by a recursive method. the properties of the filters designed with the simultaneous approximation are investigated and compared with those of exact linear and minimum phase filters.