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friedman

FRIEDMAN Instantaneous frequency density.

Calling Sequence

TIFD = friedman(TFR,HAT
TIFD = friedman(TFR,HAT,T
TIFD = friedman(TFR,HAT,T,METHOD)
TIFD = friedman(TFR,HAT,T,METHOD,TRACE)
TIFD = friedman(...,'plot')

Parameters

TFR :

time-frequency representation, (N,M) matrix.

HAT :

complex matrix of the reassignment vectors.

T :

the time instant(s) (default : (1:M)).

METHOD:

chosen representation (default : 'tfrrsp').

'plot':

when called with the additional string 'plot', friedman runs tfrqview. and TIFD will be plotted

TRACE :

if nonzero, the progression of the algorithm is shown (default : 0).

TIFD :

time instantaneous-frequency density.

Description

computes the time-instantaneous frequency density (defined by Friedman [1]) of a reassigned time-frequency representation.

WARNING : TIFD is not an energy distribution, but an estimated ------- probability distribution !

Examples

sig=fmlin(128,0.1,0.4); h=tftb_window(47,'Kaiser');
t=1:2:127; [tfr,rtfr,hat]=tfrrpwv(sig,t,128,h);
friedman(tfr,hat,t,'tfrrpwv',1,'plot');

See also

Authors

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