Allpass variable fractional delay filters by pole loci interpolation

A simple, accurate and efficient variable fractional delay (VFD) IIR filter is presented. The method is based on the interpolation of pole loci of maximally-flat allpass fractional-delay filters. The responses of the proposed VFD filter for different fractional delay values are simulated and the approximation errors are shown to be very small.


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Citation Formats
H. Hacıhabiboğlu, “Allpass variable fractional delay filters by pole loci interpolation,” ELECTRONICS LETTERS, pp. 558–559, 2010, Accessed: 00, 2020. [Online]. Available: