Computation of Signal power

Hi,

I am bit confused in computing power of a guassian pulse modulated signal.

    Fc=50e6;
    t=0:1/Fs:255/Fs;
    tau1=400e-9;
    tau2=80e-9;
    St=sin(2*pi*Fc*t).*exp(-4*pi*(((t-tau1)/tau2).^2));  

At present I am computing power as below:

    Power=mean(St.^2,2);
    

Is it right? or am missing something.

Looking forward to your comments and suggestions.

[Sindar]

Definitions of power vary by field. A few things:

• currently, your power will change if you alter sampling rate. This should fix that:

Power=mean(St.^2,2)/Fs^2;

• sometimes, "power" means total energy, not energy per time. Use sum in that case
• This signal is effectively zero for most of it's duration. If this is a single pulse (vs a periodic signal), average energy depends on your choice of sampling duration