A new approach to the design of complex all-pass IIR digital filters
Signal Processing
Canceling and selecting partials from musical tones using fractional-delay filters
Computer Music Journal
Weighted-Least-Squares Design of Variable Fractional-Delay FIR Filters Using Coefficient Symmetry
IEEE Transactions on Signal Processing
Analysis of Root Displacement Interpolation Method for Tunable Allpass Fractional-Delay Filters
IEEE Transactions on Signal Processing
Eigenfilter approach for the design of allpass filtersapproximating a given phase response
IEEE Transactions on Signal Processing
Minimax design of low-complexity allpass variable fractional-delay digital filters
IEEE Transactions on Circuits and Systems Part I: Regular Papers
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In this paper, an iterative weighted least-squares (LS) method is proposed for the design of allpass variable fractional-delay (VFD) digital filters, so that the maximum absolute phase error can be minimized. Meanwhile, it is found that the range of variable parameter will affect overall performance of the designed filter, which will be analyzed and discussed in this paper through several examples designed by least-squares and iterative weighted least-squares methods. And the stability of the designed filters and the effectiveness of the proposed iterative method are also revealed by these presented examples.