Adding white gaussian Noise to 1D signals

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

Answer 1

[Youssef Khmou]

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.

[Jessica]

Thank You

[Youssef Khmou]

You are welcome.