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fft1d

$ \bigcirc$Name


fft1d Compute the Fast Fourier Transform of a complex signal




$ \bigcirc$Command Synopsis


fft1d [-i] [-I Xi] [-A Yr] [-B Yi] Xr



-i : Compute the Inverse Transform

-I Xi : Input signal (imaginary part)

-A Yr : Output signal (real part)

-B Yi : Output signal (imaginary part)

Xr : Input signal (real part)




$ \bigcirc$Function Summary


void fft1d (Xr , Xi , Yr , Yi , inverse )

Fsignal Xr , Xi , Yr , Yi ;

char *inverse ;




$ \bigcirc$Description


This module computes the Discrete Fourier Transform of a complex signal using the fast algorithm based on the one given in [PFTV88]. It can also compute the Inverse Discrete Fourier Transform, by selecting the appropriate switch. Notice that, in this module, complex signals are represented by two fsignals: the first one contains the real part of the signal and the second one contains its imaginary part.




$ \bigcirc$See Also


fct1d, fft2d, fftrot, stkwave1.


$ \bigcirc$Version 1.2


Last Modification date : Tue Apr 8 04:40:31 2003


$ \bigcirc$Author


Chiaa Babya, Jacques Froment, Lionel Moisan






next up previous contents index
Next: saxpb Up: Reference Previous: fct1d   Contents   Index
mw 2004-05-05