On a fast and accurate method for computing Fourier transforms |
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| Authors: | P C Chakravarti M Barrientos |
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| Institution: | (1) Department of Mathematics & Statistics, McMasters University, L8N 3Z5 Hamilton, Ontario, Canada;(2) Intestinal Disease Research Unit and Department of Electrical & Comp. Engineering, McMasters University, L8N 3Z5 Hamilton, Ontario, Canada |
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| Abstract: | In this paper, a variable order method for the fast and accurate computation of the Fourier transform is presented. The increase in accuracy is achieved by applying corrections to the trapezoidal sum approximations obtained by the FFT method. It is shown that the additional computational work involved is of orderK(2m+2), wherem is a small integer andK n. Analytical expressions for the associated error is also given. |
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| Keywords: | 41A10 42A08 65B15 65D15 |
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