Comments on "Sinc interpolation of discrete periodic signals"

Recently, 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 equivalent to the results reported in the above cited paper and which, when sampled, is also shown to be equivalent to the inverse discrete Fourier transform (IDFT). To appear in the IEEE Transactions on Signal Processing