Electronics Business Journal
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Research results from C.C. Tseng and colleagues update understanding of signal processing
March 17th, 2010
"In this paper, the design of fractional delay FIR filter is investigated. First, the interpolation formula of a discrete-time sequence is derived by using discrete Fourier transform (DFT)," scientists writing in the journal Signal Processing report.
"Then, the DFT-based interpolation formula is applied to design fractional delay FIR filter by using suitable index mapping. The filter coefficients are easily computed because a closed-form design is obtained. Next, design examples are demonstrated to show that the proposed DFT method has a smaller design error than those of the conventional Lagrange and window fractional delay FIR filters when using the same design...
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Source: Electronics Business Journal (2010-03-17)