Title :
Design of causal stable IIR perfect reconstruction filter banks using transformations of variables
Author_Institution :
Sch. of Electr. & Electron. Eng., Nanyang Technol. Univ., Singapore
Abstract :
In this paper the author presents an improvement to the previously proposed design technique for 2-channel, causal stable IIR perfect reconstruction filter banks. The technique is based on transformations of variables. Previously, the transformation functions used were all-pass but this yielded subband filters with fairly large overshoot in its frequency response. By relaxing the requirement of using all-pass transformation functions, filters with improved response (lower and no overshoot) are achievable
Keywords :
IIR filters; filtering theory; frequency response; optimisation; stability; wavelet transforms; 2-channel filter banks; IIR perfect reconstruction filter banks; causal stable IIR filter banks; design technique; frequency response; transformation functions; transformations of variables; Adaptive filters; Channel bank filters; Echo cancellers; Filter bank; Finite impulse response filter; Frequency; IIR filters; Low pass filters; Polynomials; Prototypes;
Conference_Titel :
Circuits and Systems, 1997. ISCAS '97., Proceedings of 1997 IEEE International Symposium on
Print_ISBN :
0-7803-3583-X
DOI :
10.1109/ISCAS.1997.612813
