Solution time comparisons between FFT and DFT

Abstract EN

Fa& Fourier transform is advance technology for many en- gineering application The aim of this paper is to &udy , analyize and enhance the solution time of DFT using FFT a logarithm and Excel software program .

The parameter which were taken into consideration of the calculation arc number of point, type of FFT after analysis and implementation of the logarithm ,thc results were obtained in terms of chart for solution time versus number of point increased and average time for solving one point using DFT is 0.76050min while the average solution time using FFT is 0.38025 min the saved in time by using FFT is 0.38025 min.

while the FFT solution time using MATLAB is real time solution in the inslant of command.