What is the reference value of standard deviation of white Gaussian noise when doing

[kerin]

Hi! what is the standard deviation of white Gaussian noise when doing SINR simulation?

I am new to communication simulation. I have a project which needs to calculate SINR. SINR = P/(N+I), and here the noise is white Gaussian noise. Generally speaking, is there any reference value of standard deviation of white Gaussian noise?

Any comments or leads are welcome. Thanks in advance for your kind help.

 

[pancho_hideboo]

Standard Deviation=RMS Value of Noise

 

[kerin]

Thanks.

The website says that

P_Noise= -173.83 + 10log10(B) (dBm)

Do you think it is correct?

 

[pancho_hideboo]

T=300K, k=1.38e-23J/K
10*log10(k*T/1e-3)=-173.83dBm/Hz

k*T*B=Noise Available Power
sqrt(k*T*B)=Noise RMS Value

 

[kerin]

T=300K, k=1.38e-23J/K
10*log10(k*T/1e-3)=-173.83dBm/Hz

k*T*B=Noise Available Power
sqrt(k*T*B)=Noise RMS Value

Actually, I want to calculate SINR, SINR = P/(N+I), and I know that N=σ², σ is the standard deviation of AWGN. So I searched the internet, and want to find out what the standard deviation of AWGN is.

And now I finally know that the noise power could be calculated using the formula N = K*T*B. Thanks for your help.