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Time Frequency Toolbox >> Time Frequency Toolbox > Frequency-Domain Processing > ffmt

ffmt

Fast Fourier Mellin Transform.

Calling Sequence

[MELLIN,BETA]=ffmt(X)
[MELLIN,BETA]=ffmt(X,FMIN,FMAX)
[MELLIN,BETA]=ffmt(X,FMIN,FMAX,N)

Parameters

X :

signal in time (Nx=length(X)).

FMIN,FMAX :

respectively lower and upper frequency bounds of the analyzed signal. These parameters fix the equivalent frequency bandwidth (expressed in Hz). When unspecified, you have to enter them at the command line from the plot of the spectrum. FMIN and FMAX must be >0 and <=0.5.

N :

number of analyzed voices. N must be even (default : automatically determined).

MELLIN :

the N-points Mellin transform of signal S.

BETA :

the N-points Mellin variable.

Description

ffmt computes the Fast Mellin Transform of signal X.

Examples

sig=altes(128,0.05,0.45);
[MELLIN,BETA]=ffmt(sig,0.05,0.5,128);
plot(BETA,real(MELLIN));

See also

Authors

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