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Ctfrgrd

Generalized rectangular time-frequency distribution

Calling Sequence

[TFR,T,F] = Ctfrgrd(X)
[TFR,T,F] = Ctfrgrd(X, T)
[TFR,T,F] = Ctfrgrd(X, T, N)
[TFR,T,F] = Ctfrgrd(X, T, N, G)
[TFR,T,F] = Ctfrgrd(X, T, N, G, H)
[TFR,T,F] = Ctfrgrd(X, T, N, G, H, RS)
[TFR,T,F] = Ctfrgrd(X, T, N, G, H, RS, MOVERN)

Parameters

X :

Analyzedd 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 (default : Hamming(N/4)).

RS :

kernel width (default : 1).

MOVERN :

dissymmetry ratio (default : 1).

TFR :

time-frequency representation

F :

vector of normalized frequencies.

Description

computes the Generalized Rectangular distribution of a signal X.

Examples

x = hilbert(sin(2*%pi*0.25*(1:128))+0.5*rand(1,128,'normal'));
g = Cwindow(9,'hamming');
h = Cwindow(27,'hamming');
t = 1:128;
[tfr,T,F] = Ctfrgrd(x,t,128,g,h,36,1/5);
grayplot(T,F,tfr');
xlabel time
ylabel frequency

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