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Coefficient relation-based minimax design and low-complexity structure of variable fractional-delay digital filters
- Source :
-
Signal Processing . Apr2013, Vol. 93 Issue 4, p923-932. 10p. - Publication Year :
- 2013
-
Abstract
- Abstract: Although the coefficient-relation of the even-order sub-filters in the Farrow structure has been revealed and adopted in the weighted-least-squares (WLS) design of even-order finite-impulse-response (FIR) variable fractional-delay (VFD) digital filters in the literature, it has never been exploited in implementing low-complexity VFD filters. This paper aims to [(i)] propose a low-complexity implementation structure through exploiting the coefficient-relation such that the coefficient-relation is not only utilized in the design process, but also utilized in the low-complexity implementation; [(ii)] formulate the minimax design of an even-order VFD filter through exploiting the coefficient-relation; [(iii)] propose a new two-stage scheme called increase-then-decrease scheme for optimizing the sub-filter orders so as to minimize the VFD digital filter complexity. With the above three advances, an even-order VFD filter can not only be designed and but also be implemented efficiently by exploiting the coefficient-relation. We will use a design example to illustrate the low complexity and high design accuracy. [Copyright &y& Elsevier]
Details
- Language :
- English
- ISSN :
- 01651684
- Volume :
- 93
- Issue :
- 4
- Database :
- Academic Search Index
- Journal :
- Signal Processing
- Publication Type :
- Academic Journal
- Accession number :
- 84477644
- Full Text :
- https://doi.org/10.1016/j.sigpro.2012.11.004