An efficient design of a variable fractional delay filter using a first-order differentiator
Soo-Chang Pei
Chien-Cheng Tseng
Dept. of Electr. Eng., Nat. Taiwan Univ., Taipei, Taiwan;
This paper appears in: Signal Processing Letters, IEEE
Publication Date: Oct. 2003
Volume: 10,
Issue: 10
On page(s): 307- 310
ISSN: 1070-9908
INSPEC Accession Number: 7743789
Digital Object Identifier: 10.1109/LSP.2003.815616
Current Version Published: 2003-09-23
Abstract
In this paper, the Taylor series expansion is used to transform the design problem of a fractional delay filter into the one of a first-order differentiator such that the conventional finite-impulse response and infinite-impulse response differentiators can be applied to design a fractional delay filter directly. The proposed structure is more efficient than the well-known Farrow structure in terms of filter coefficient storage because only one first-order differentiator needs to be designed and implemented. Moreover, one design example is demonstrated to illustrate the effectiveness of this new design approach.
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