amplification factor of Amplify and forward protocol

[hmayna]

Hi all,

in AF protocol the relay multiply the received signal from the source by an amplification factor

β=sqrt(P/(N0+P|hsr|²)

where P is the transmitted power,hsr is the channel 's vector between source and relay,

my question is about how to calculate |hsr|² if we have hsr=randn(1,N)+j*randn(1,N) i other way hsrr is a N complex number.

 

[David83]

In MATLAB you can write

abs(hsr)^2

 

[David83]

I forgot to mention that because hsr is a vector you need to use abs(hsr).^2 (with . preceding ^).