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

tfrridh

Reduced Interference Distribution with Hanning kernel.

Calling Sequence

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

Parameters

X :

signal if auto-RIDH, or [X1,X2] if cross-RIDH.

T :

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

N :

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

G :

time smoothing window, G(0) being forced to 1. (default : Hamming(N/10)).

H :

frequency smoothing window, H(0) being forced to 1. (default : Hamming(N/4)).

TRACE :

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

'plot':

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

TFR :

time-frequency representation.

F :

vector of normalized frequencies.

Description

tfrridh Reduced Interference Distribution with a kernel based on the Hanning window. tfrridh computes either the distribution of a discrete-time signal X, or the cross representation between two signals.

Examples

sig=[fmlin(128,0.05,0.3)+fmlin(128,0.15,0.4);zeros(64,1)];
g=tftb_window(31,'rect'); h=tftb_window(63,'rect');
for t=120:1:130; t,plot(tfrridh(sig,t,128,g,h,0)); end;

Authors

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