Re: variance = power or energy?
- From: "Chuckie" <nospam@xxxxxxxxxx>
- Date: Tue, 24 May 2005 13:24:02 -0500
<porterboy76@xxxxxxxxx> wrote in message
news:1116952239.844662.284130@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
> Q: Does the variance of a zero-mean discrete time signal describe the
> energy of the signal or the power of the signal?
>
> I'm pretty sure it is the energy, since to determine the power you need
> to know the sampling rate...
>
What is the difference between energy and power? Time, yes but also
impedance.
What are the units to your variance?
How are you measuring it, with a meter? scope? theory?
Voltage across an impedance is power
Answer to your question is "either", until further specifics about problem.
.
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