mariuszprus
Newbie level 6
AWGN chanel
Hi I am from Poland and I need your helpi must generate Gaussian noisse AWGN
I implement AWGN channel in trellis code modulation.
i have coder and modulation 8PSK to this signal i must add gaussian noise and depend this noise SNR ( we must give SNR)
supose we have SNR=10log(Psignal/Pnoise) and how can i generate noise
??
Psignal=1
we have one more SNR 10log(Asignal/Anoise)^2 =10log(1/Asignal)
and i dont know what is No/2 in **broken link removed**
My code
where amp i is the amplitude of signal noise Anoise
amp=sqrt(pow(10.0,(-SNR/10.0)));
or No/2 and we must divide amp/2 ??
please help me!!!;
Hi I am from Poland and I need your helpi must generate Gaussian noisse AWGN
I implement AWGN channel in trellis code modulation.
i have coder and modulation 8PSK to this signal i must add gaussian noise and depend this noise SNR ( we must give SNR)
supose we have SNR=10log(Psignal/Pnoise) and how can i generate noise
??
Psignal=1
we have one more SNR 10log(Asignal/Anoise)^2 =10log(1/Asignal)
and i dont know what is No/2 in **broken link removed**
My code
Code:
double noise(Random ^generator)
{
if(amp==0)
{
return 0;
}
else
{
double x=0,y=0;
for(int i=0;i<12;i++)
{
y=generator->NextDouble();
x=x+y;
}
x=x-6;
return (x*amp);
}where amp i is the amplitude of signal noise Anoise
amp=sqrt(pow(10.0,(-SNR/10.0)));
or No/2 and we must divide amp/2 ??
please help me!!!;