Review of scientific instruments vol:56 issue:12 pages:2325-2327
An alternative discrete (fast) Fourier transform algorithm with suppressed aliasing is presented. It is inspired by work done by Sorella and Ghosh [Rev. Sci. Instrum. 55, 1348 (1984)]. While using their idea of expanding the time function as a series (as Schütte [Rev. Sci. Instrum. 52, 400 (1981)] and Mäkinen [Rev. Sci. Instrum. 53, 627 (1982)] have done), it corrects a flaw in their method. The remarkable quality of the calculation is illustrated for an exponential decay by comparing the results to analytical values.