how to calculate signal and noise power

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

thanks
Reza

On Nov 8, 4:23&#4294967295;am, "sunshineshuvo" <sohagiut@n_o_s_p_a_m.yahoo.com>
wrote:
> how to calculate signal and noise power
> hello,
> i have a signal current I(t)=Acos(wt+theta)
> How can i calculate the signal power and noise power individually?
>
> thanks
> Reza

Assuming a resistive load:

Turn on the signal and compute the product of RMS voltage and RMS
current. This is the total (signal plus noise) power.

Turn off the signal and repeat. This is the noise power.

John