FIR approximation of fractional sample delay systems
Peter J. Kootsookos, Robert C. Williamson · IEEE Transactions on Circuits and Systems II Analog and Digital Signal Processing · 1996
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 /spl omega//sub 0/=0 and the window used is a scaled binomial function. The first of these has been known before, the second equivalence is new.