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International Journal of Digital Multimedia Broadcasting
Volume 2010, Article ID 194306, 6 pages
Research Article

Frequency-Based Optimization Design for Fractional Delay FIR Filters with Software-Defined Radio Applications

1Electronics Department, Technological Institute of Celaya, Celaya, GTO 38010, Mexico
2Electronics Department, National Institute of Astrophysics Optics and Electronics, Tonantzintla, PUE 72840, Mexico

Received 8 November 2009; Accepted 1 January 2010

Academic Editor: Massimiliano Laddomada

Copyright © 2010 Javier Díaz-Carmona et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


A frequency-designed fractional delay FIR structure, which is suitable for software radio applications, is presented. The design method is based on frequency optimization of a combination of modified Farrow and mutirate structures. As a result the optimization frequency range is made only in half of desired total bandwidth. According to the obtained results the proposed fractional delay structure allows online desired fractional delay update, with a high fractional delay value resolution.