.Modelica.Math.FastFourierTransform

Information

This package provides functions to compute the Fast Fourier Transform (FFT).

For an example see Examples.RealFFT1 where the following signal is computed during simulation

   y = 5 + 3*sin(2*pi*2) + 1.5*cos(2*pi*3)

the continuous-time signal y is sampled and the FFT is computed with a call to realFFT(f_max=4, f_resolution=0.2), resulting in:

References

Mark Borgerding (2010):

KissFFT, version 1.3.0. http://sourceforge.net/projects/kissfft/.
 

James W. Cooley, John W. Tukey (1965):

An algorithm for the machine calculation of complex Fourier series. Math. Comput. 19: 297-301. doi:10.2307/2003354.
 

Martin R. Kuhn, Martin Otter, Tim Giese (2015):

Model Based Specifications in Aircraft Systems Design. Modelica 2015 Conference, Versailles, France, pp. 491-500, Sept.23-25, 2015. Download from: http://www.ep.liu.se/ecp/118/053/ecp15118491.pdf

Contents

Name	Description
Examples	Examples demonstrating the usage of the Math.FastFourierTransform functions
realFFTinfo	Print information about real FFT for given f_max and f_resolution
realFFTsamplePoints	Return number of sample points for a real FFT
realFFT	Return amplitude and phase vectors for a real FFT
realFFTwriteToFile	Write real FFT computation to file
Internal	Internal library that should not be used directly by a user

Revisions