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On designing minimax adjustable wideband fractional delay FIR filters using two-rate approach

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2 Author(s)
E. Hermanowicz ; Dept. of Multimedia Syst., Gdansk Univ. of Technol., Poland ; H. Johansson

This paper introduces a novel solution to the problem of designing an economical adjustable wideband fractional delay (FD) filter. The innovation lies in an aggregation of two approaches aimed at obtaining a two-stage FD filter with reduced numerical complexity. The first approach is based on simultaneous optimization of sub-filters in one-stage arrangement. The second one makes use of two-rate technique to end up with an efficient single-rate structure. The novel design procedure entails joint minimax optimization of both stages and concurrently takes advantage of the benefits of the Farrow structure build up of fixed linear-phase sub-filters. Our filter requires a lower arithmetic complexity than the hitherto available ones, while meeting the same specification on the complex approximation error magnitude.

Published in:

Proceedings of the 2005 European Conference on Circuit Theory and Design, 2005.  (Volume:3 )

Date of Conference:

28 Aug.-2 Sept. 2005