A New Method for Least-Squares and Minimax Group-Delay Error Design of Allpass Variable Fractional-Delay Digital Filters. (4th January 2011)

• Record Type: Journal Article
• Authors: Chan Chan, Cheng-Han Cheng-Han; Pei Pei, Soo-Chang Soo-Chang; Shyu Shyu, Jong-Jy Jong-Jy
• Other Names: O'Shaughnessy O'Shaughnessy Douglas Douglas Academic Editor.
• Is Part Of: EURASIP journal on advances in signal processing. Volume 2010(2010)
• Publication Date: 2011-01-04
• Subjects: Signal processing -- Periodicals; Traitement du signal; Signal processing; Periodicals; 621.3822
• DOI: 10.1155/2010/976913
• Languages: English
• ISSNs: 1687-6172

Abstract

Abstract : A double-loop iterative method is proposed to design allpass variable fractional-delay (VFD) digital filters basing on the minimization of root-mean-squared group-delay error. In the inner loop, an iterative quadratic optimization is proposed to replace the original nonlinear optimization for the minimization of root-mean-squared group-delay error, while an iterative weighting-updated technique is applied in the outer loop to further reduce the maximum group-delay error. Several examples will be presented to demonstrate the effectiveness and good convergence of the proposed method.