how to calculate signal and noise power

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sunshineshuvo

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hello,
i have a signal current I(t)=Acos(wt+theta)
How can i calculate the signal power and noise power individually?

thanks
Reza
 

the shot noise created is Ishot = sqrt(2*e*I*bandwidth), maybe you can get the noise created by that current with this formula and get the noise power individually, otherwise Acos(wt) does not have a noise in it.
 

Is theta a static phase offset or a time-domain signal representing your noise ?
 

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