Title :
A new design method for two-channel perfect reconstruction IIR filter banks
Author :
Chan, S.C. ; Mao, J.S. ; Ho, K.L.
Author_Institution :
Dept. of Electr. & Electron. Eng., Hong Kong Univ., China
Abstract :
In this paper, a new method for designing perfect reconstruction (PR) two-channel causal stable IIR filter banks is introduced. It is based on a structure previously proposed by Phoong et al. (1995). By using a combination of allpass and linear-phase FIR functions, the bumping problem found in the conventional structural PR filter bank is significantly suppressed. The design problem is formulated as a polynomial approximation problem and is solved effectively using the Remez exchange algorithm. Filter banks with flexible stopband attenuation and system delay can readily be obtained using the proposed algorithm.
Keywords :
IIR filters; all-pass filters; band-stop filters; channel bank filters; linear phase filters; polynomial approximation; Remez exchange algorithm; allpass functions; bumping problem; design method; flexible stopband attenuation; linear-phase FIR functions; polynomial approximation; system delay; two-channel causal stable IIR filter banks; two-channel perfect reconstruction IIR filter banks; Attenuation; Chebyshev approximation; Delay systems; Design methodology; Filter bank; Finite impulse response filter; Frequency response; IIR filters; Linear approximation; Polynomials;
Journal_Title :
Signal Processing Letters, IEEE
