Variable fractional delay filter with sub-expression coefficients
MetadataShow full item record
Variable fractional delay (VFD) filters are useful for various signal processing and communication applications with frequency characteristics such as fractional delays to be varied online. In this paper, we investigate the design of VFD filters with discrete coefficients as a means of achieving low complexity and efficient hardware implementation. The optimization problem with minimax criterion is formulated as a mixed integer programming problem with a non-linear cost function and continuous constraints. An efficient optimization procedure is proposed to tackle the design problem that includes a combination of the branch and bound method and an adaptive scheme for discretization. Design examples are given to demonstrate the effectiveness of the proposed algorithm.
Copyright © 2013 ICIC International
Showing items related by title, author, creator and subject.
Chu, Chuan-Wei Kevin (2017)Variable fractional delay filters allow the delay of a filter to be varied continuously over an interval without the need to redesign the filter. A popular structure to implement these filters is the Farrow structure. ...
Dam, Hai Huyen Heidi (2014)This letter develops an efficient computational procedure for the design of an odd-order variable fractional delay (VFD) digital filter with minimum peak variable fractional delay error subject to restrictions on the peak ...
Lee, Wei; Caccetta, Louis; Rehbock, Volker (2008)This paper presents a computational method for the optimal design of all-pass variable fractional-delay (VFD) filters aiming to minimize the squared error of the fractional group delay subject to a low level of squared ...