Title :
Phase improvement in IIR digital filters
Author :
Shi, Sonwing ; Manry, M.T.
Author_Institution :
Dept. of Electr. Eng., Texas Univ., Arlington, TX, USA
fDate :
10/1/1989 12:00:00 AM
Abstract :
A new technique is presented for improving the phase response of finite impulse-response (IIR) digital filters. In this technique, a measure of phase nonlinearity is developed. Given an IIR filter which has the desired amplitude response and it realized as a cascade of second-order sections, the measure is minimized by making some of the sections anticausal. Efficient implementation of this algorithm is discussed. Examples illustrating the technique are also given
Keywords :
digital filters; filtering and prediction theory; IIR digital filters; amplitude response; cascade; finite impulse-response; phase nonlinearity; Acoustic measurements; Chebyshev approximation; Digital filters; Fourier transforms; IIR filters; Linear approximation; Linearity; Phase measurement; Signal analysis; Speech processing;
Journal_Title :
Acoustics, Speech and Signal Processing, IEEE Transactions on
