randn, awgn, wgn
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Hi I have a small doubt. Is
a = awgn(randn(20,20), 6.7) and
a = wgn(20,20,6.7) the same
Aim is, I want a 20X20 frame with a SNR = 6.7 dB
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Wayne King
le 1 Déc 2011
Hi, SNR implies that you have a signal, in your call to awgn() you have no signal, just noise.
If you use awgn() you should input your signal and awgn() will add noise at the specified SNR.
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Wayne King
le 1 Déc 2011
but don't want your "frame" to be a matrix of constants then? Again, SNR implies that you have a signal. Do you really want to call randn(20,20) a signal. If you just want noise of a specified variance, that is different than SNR
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