In matlab, I create a sawtooth signal, add noise to it using 'awgn' function, and then measure the SNR using 'snr' function.
x = sawtooth(0:0.1:10);
y = awgn(x,10,'measured');
SNR = snr(y,y-x);
My question is that snr doesn't give SNR equal to 10. Rather, it gives something near to 10, but still not close enough.
Is there any other way to add noise accurately with predetermined snr, to a signal?
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