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tfrwv

Wigner-Ville time-frequency distribution

Calling Sequence

[TFR,T,F] = tfrwv(X)
[TFR,T,F] = tfrwv(X, T)
[TFR,T,F] = tfrwv(X, T, N)
[TFR,T,F] = tfrwv(X, T, N, TRACE)
[TFR,T,F] = tfrwv(...,'plot')

Parameters

X :

A Nx elements vector (auto-WV) or a Nx by 2 array signal (cross-WV).

T:

a real Nt vector with elements in [1 Nx] : time instant(s) on which the TFR is evaluated (default: 1:NX).

N:

a positive integer: the number of frequency bins (default:NX).

TRACE :

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

'plot':

if one input parameter is 'plot', tfrqview is called and the time-frequency representation will be plotted.

TFR :

A real N by Nt array: the time-frequency representation.

F :

A N vector of normalized frequencies.

Description

tfrwv computes the Wigner-Ville distribution of a discrete-time signal or the cross Wigner-Ville representation between two signals.

Examples

sig = fmlin(128,0.1,0.4); 
[TFR,T,F] = tfrwv(sig);
clf; gcf().color_map = jetcolormap(128);
Sgrayplot(T,F(1:$/2),TFR(1:$/2,:)');

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