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Time Frequency Toolbox >> Time Frequency Toolbox > Time-Frequency representations (C - Toolbox) > Ctfrmhs

Ctfrmhs

Margenau-Hill-Spectrogram time-frequency distribution.

Calling Sequence

[TFR,T,F]=Ctfrmhs(X)
[TFR,T,F]=Ctfrmhs(X,T)
[TFR,T,F]=Ctfrmhs(X,T,N)
[TFR,T,F]=Ctfrmhs(X,T,N,G)
[TFR,T,F]=Ctfrmhs(X,T,N,G,H)

Parameters

X :

Analyzed signal.

T :

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

N :

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

G :

time smoothing window, (default : Hamming(N/10)).

H :

frequency smoothing window, in the time-domain, (default : Hamming(N/4)).

TFR :

time-frequency representation.

F :

vector of normalized frequencies.

Description

computes the Margenau-Hill-Spectrogram distribution of a signal X.

Examples

x = hilbert(sin(2*%pi*0.25*(1:128))+0.5*rand(1,128,'normal'));
g=Cwindow(21,'Hamming');     h=Cwindow(63,'Hamming');
t=1:128; [tfr,T,F]=Ctfrmhs(x,t,128,g,h);
grayplot(T,F,tfr');  xlabel('time'); ylabel('frequency')

See also

Authors

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