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

This information is part of the Modelica Standard Library maintained by the Modelica Association.

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