Design of causal IIR perfect reconstruction filter banks

This paper presents a new method for designing two channel biorthogonal IIR lter banks, which satisfy both the perfect reconstruction and causal stable conditions. The proposed method is based on the formulation of a generalized eigenvalue problem by using Remez multiple exchange algorithm. Therefore, the lter coe cients can be computed by solving the eigenvalue problem, and the optimal solution is easily obtained through a few iterations. One example is designed to demonstrate the e ectiveness of the proposed method.