Time-domain design of linear-phase PR filter banks

In this paper, we present a novel way to design biorthogonal and paraunitary linear phase(LPPUFB) lter banks. The square error of the perfect reconstruction condition is expressed in quadratic form of lter coe cients and the cost function is minimized by solving linear equation iteratively without nonlinear optimization. With some modi cations, the method can be extended to the design of paraunitary lter banks. Using this method, we can design LPPUFB with many channels easily and quickly. Design examples are given to validate the proposed method.