Novel method for identification of digital all-pass filter transfer function

This paper deals with an identification method of the digital all-pass filter transfer function. The method is based on a usage of differential evolution (DE) algorithm which was programmed in the MATLAB environment. Several different versions of DE algorithm are compared to achieve the best solving of this task. Parameters of the transfer function of this filter were identified by using its group delay frequency response. This technique has been applied to the digital all-pass filter transfer function identification with good results. The designed digital all-pass filter was simulated in the MATLAB environment.