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Efficient Design and Implementation of Variable Fractional Delay Filters Using Differentiators

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2 Author(s)
Chien-Cheng Tseng ; Department of Computer and Communication Engineering, National Kaohsiung First University of Science and Technology, Kaohsiung, Taiwan, R.O.C. ; Su-Ling Lee

In this paper, the power series expansion of exponential function is used to transform the design problem of variable fractional delay (VFD) filter into the designs of digital differentiators with various orders such that conventional digital differentiators can be applied to implement VFD filter efficiently. The proposed method is flexible because the VFD filter can be designed by making the trade-off among the storage requirement of filter coefficients, computational complexity and delay of filter. Finally, some numerical examples are demonstrated to show the effectiveness and flexibility of the proposed design methods.

Published in:

IEEE Transactions on Circuits and Systems I: Regular Papers  (Volume:58 ,  Issue: 6 )