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FIR approximation of fractional sample delay systems

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2 Author(s)
Kootsookos, P.J. ; Dept. of Eng., Australian Nat. Univ., Canberra, ACT, Australia ; Williamson, R.C.

This brief examines the approximation of fractional delays by FIR systems using various techniques which have previously been reported in the literature. In particular, the equivalence of the time-domain Lagrangian interpolation, the frequency-domain maximally flat error criterion and the window method is shown, provided maximal flatness is specified at ω0=0 and the window used is a scaled binomial function. The first of these has been known before, the second equivalence is new

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Circuits and Systems II: Analog and Digital Signal Processing, IEEE Transactions on  (Volume:43 ,  Issue: 3 )