MATLAB: How to increase the space between trains in this periodic waveform

MATLABpulstran functionsimulinkwaveform

Hi Friends I am interested in the pulstran function below:

t = 0 : 1/50E3 : 10e-3;
d = [0 : 1/1E3 : 10e-3 ; 0.8.^(0:10)]';
y = pulstran(t,d,'gauspuls',10e3,0.5); 
plot(t,y)

I need to now what to do to increase the space or distance between each train in the waveform. Someone pls help urgently.

Thanks in advance

Best Answer

t = 0 : 1/50E3 : 10e-3;
spac=3e-3
spac_vect=0 : spac : 10e-3   % vector of delays
amp_vect=0.8.^(0:numel(spac_vect)-1) % vector of amplitudes
d = [spac_vect;amp_vect]';
y = pulstran(t,d,'gauspuls',10e3,0.5);
plot(t,y)

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MATLAB: HOW TO GENERATE SQUARE PULSE

If you have signal processing toolbox, use pulstran

EDIT

Amp=1   % Pulse amplitude
Wd=0.07   % Pulse width
sp=[1.2 2.4 3];
fr=[7 7 6];
spac_vect=cumsum(cell2mat(arrayfun(@(x,y) x*ones(1,y),sp,fr,'un',0)))
amp_vect=Amp*ones(1,numel(spac_vect)) % vector of amplitudes
t=linspace(0,max(spac_vect),1000) % time vector
d = [spac_vect;amp_vect]';
y = pulstran(t,d,'rectpuls',Wd);
plot(t,y)

MATLAB: Add noise

You can use randn()

t = 0:0.001:1;
x = cos(2*pi*100*t);
y = x+randn(size(t));

Of course that assumes you want N(0,1) additive noise. If you want zero-mean Gaussian white noise with a different variance, then use

   y = x+sqrt(var_value)*randn(size(t));

where var_value is the variance you want.

Best Answer

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MATLAB: HOW TO GENERATE SQUARE PULSE

MATLAB: Add noise

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