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Time Frequency Toolbox >> Time Frequency Toolbox > Frequency-Domain Processing > iffmt

iffmt

Inverse fast Mellin transform.

Calling Sequence

X=iffmt(MELLIN,BETA)
X=iffmt(MELLIN,BETA,M)

Parameters

MELLIN :

Mellin transform to be inverted. Mellin must have been obtained from FMT with frequency running from FMIN to 0.5 Hz.

BETA :

Mellin variable issued from FMT.

M :

number of points of the inverse Mellin transform. (default : length(MELLIN)).

X :

inverse Mellin transform with M points in time.

Description

iffmt computes the inverse fast Mellin transform of MELLIN. WARNING : the inverse of the Mellin transform is correct only if the Mellin transform has been computed from FMIN to 0.5 Hz, and if the original signal is analytic.

Examples

sig=atoms(128,[64,0.25,32,1]);
[MELLIN,BETA]=ffmt(sig,0.05,0.5,256); clf;
X=iffmt(MELLIN,BETA,128); plot(real(X));
plot(real(sig),'g');

See also

Authors

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