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Jessica
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Adding white gaussian Noise to 1D signals

Asked by Jessica
on 14 Feb 2015
Latest activity Commented on by Youssef Khmou
on 14 Feb 2015
How can I add the same white guassian noise to different signals using awgn ? in fact I need to variate the SNR and compare the results

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1 Answer

Answer by Youssef Khmou
on 14 Feb 2015
Edited by Youssef Khmou
on 14 Feb 2015
 Accepted Answer

To produce a unique sequence of white Gaussian noise, you need to reset the sate as follows :
x=sin(2*pi*0.2*(0:0.1:10));
y=awgn(x,10,'measured',10);
y2=awgn(x,10,'measured',10);
the state is set to 10, therefore the signals y and y2 are identical.
Note : the option 'measured' in function's argument means that the function measures the power of input signal before adding the perturbation.

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Thank You
You are welcome.

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