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Time Frequency Toolbox >> Time Frequency Toolbox > Reassigned Time-Frequency Processing > tfrrgab

tfrrgab

Reassigned Gabor spectrogram time-frequency distribution.

Calling Sequence

[TFR,RTFR,HAT] = tfrrgab(X)
[TFR,RTFR,HAT] = tfrrgab(X,T)
[TFR,RTFR,HAT] = tfrrgab(X,T,N)
[TFR,RTFR,HAT] = tfrrgab(X,T,N,NH)
[TFR,RTFR,HAT] = tfrrgab(X,T,N,NH,TRACE)
[TFR,RTFR,HAT] = tfrrgab(X,T,N,NH,TRACE,K)
[TFR,RTFR,HAT] = tfrrgab(...,'plot')

Parameters

X :

analysed signal

T :

the time instant(s) (default : 1:length(X))

N :

number of frequency bins (default : length(X))

NH :

length of the gaussian window (default : N/4))

TRACE :

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

K :

value at both extremities (default 0.001)

'plot':

if one input parameter is 'plot', tfrrgab runs tfrqview. and TFR will be plotted

TFR, :

time-frequency representation and its reassigned

HAT :

Complex matrix of the reassignment vectors.

Description

tfrrgab computes the Gabor spectrogram and its reassigned version. This particular window (a Gaussian window) allows a 20 % faster algorithm than the tfrrsp function.

Examples

sig=fmlin(128,0.1,0.4); tfrrgab(sig,1:128,128,19,1,'plot');

Authors

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