Title :
Simultaneous amplitude and phase approximation for FIR filters
Author :
Leeb, F. ; Henk, T.
Author_Institution :
Res. Inst. for Telecommun., Budapest, Hungary
Abstract :
An FIR (finite-impulse response) filter design method with simultaneous amplitude and phase approximation is presented. Two components are proposed in this design method: simultaneous amplitude and phase interpolation in the passband and amplitude interpolation in the stopband. These interpolations are performed 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 design with the simultaneous approximation are investigated and compared with properties of the exact linear and minimum-phase filters.<>
Keywords :
digital filters; FIR filters; Remez exchange algorithm; amplitude interpolation; design method; passband; phase approximation; phase interpolation; recurrence coefficients; recurrence formulae; recursive method; simultaneous approximation; stopband; Approximation algorithms; Costs; Delay; Design methodology; Differential equations; Finite impulse response filter; Interpolation; Nonlinear filters; Passband; Polynomials;
Conference_Titel :
Circuits and Systems, 1988., IEEE International Symposium on
Conference_Location :
Espoo, Finland
DOI :
10.1109/ISCAS.1988.14868
