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Adding white gaussian Noise to 1D signals

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Jessica
Jessica on 14 Feb 2015
Commented: 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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Youssef  Khmou
Youssef Khmou on 14 Feb 2015
Edited: Youssef Khmou on 14 Feb 2015
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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