The design of two-channel PR FIR filter bank with linear-phase using evolutionary strategies

A novel method for the design of a two-channel linear-phase perfect reconstruction (PR) FIR filter bank is proposed. In order to ensure the PR property, a lattice architecture has been adopted. Evolutionary strategies (ES) are used to search for an optimal set of coefficients in lattice structure. For increasing the searching speed, an initial set of coefficients is obtained by a constrained optimization method. Some design examples are given to illustrate the proposed method. The results are presented which show that this method can be used to design the filter bank with high stop band attenuation, compared to conventional methods