Title :
Design of minimum-phase finite-impulse-response digital filters
Author_Institution :
University of Calgary, Department of Electrical Engineering, Calgary, Canada
fDate :
8/1/1977 12:00:00 AM
Abstract :
A method is presented which can be used for the direct design of minimum-phase finite-impulse-response digital filters with arbitrary prescribed modulus-squared characteristics. This method uses the Fletcher-Powell optimisation technique to minimise an L2p norm to obtain a nonnegative polynomial fit to the desired characteristics in a transformed domain. The coefficients of the filter are then obtained from the zeros of this polynomial. Examples of lowpass and bandpass filter designs are given using an L20 norm. A comparison of the passband and stopband ripples and their ratio is made with linear-phase filter designs.
Keywords :
design engineering; digital filters; optimisation; Fletcher Powell optimisation technique; arbitrary prescribed modulus squared characteristics; bandpass filter; filter coefficients; linear phase filter; low pass filter; minimum phase finite impulse response digital filter design; nonnegative polynomial; stopband ripples;
Journal_Title :
Electrical Engineers, Proceedings of the Institution of
DOI :
10.1049/piee.1977.0144
