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Time Frequency Toolbox >> Time Frequency Toolbox > Bilinear Time-Frequency Processing in the Cohen's Class > tfrsp

tfrsp

Spectrogram time-frequency distribution.

Calling Sequence

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

Description

tfrsp computes the Spectrogram distribution of a discrete-time signal X.

Parameters

X :

signal.

T :

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

N :

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

H :

analysis window, H being normalized so as to be of unit energy. (default : Hamming(N/4)).

TRACE :

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

'plot':

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

TFR :

time-frequency representation.

F :

vector of normalized frequencies.

Examples

sig=fmlin(128,0.1,0.4);
h=tftb_window(17,'Kaiser'); tfrsp(sig,1:128,64,h,1,'plot');

[tfr,t,freq]=tfrsp(sig,1:128,64,h,1); plot(fftshift(freq),fftshift(tfr(:,100)))

Authors

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