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Comments on "Sinc interpolation of discrete periodic signals

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2 Author(s)
F. Candocia ; Dept. of Electr. & Comput. Eng., Florida Univ., Gainesville, FL, USA ; J. C. Principe

In a recent paper by T. Schanze (see ibid., vol.43, p.1502-3, 1995) the convolution of the sinc kernel with the infinite sequence of a periodic function was expressed as a finite summation. The expression obtained, however, is not numerically stable when evaluated at or near integer values of time. This correspondence presents a numerically stable formulation that is equivalent to the results reported in the above-cited paper and that, when sampled, is also shown to be equivalent to the inverse discrete Fourier transform (IDFT).

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IEEE Transactions on Signal Processing  (Volume:46 ,  Issue: 7 )