Digital all-pass filter phase compensation with an enhanced eigenfilter algorithm
J.J. Tapia, Guillermo E. Atkin, J.L. LoCicero · 2003
An enhanced eigenfilter algorithm is introduced to design a digital all-pass filter that approximates a desired phase response in the least-square (LS) sense. A method to match a desired delay function is also presented. These iterative techniques use the Rayleigh principle to solve the LS phase error problem. Performance improvement over other design techniques is evident for low and medium order filters when a mean-squared error metric is computed.