How to differenciate between energy and power signal?
Answers
Explanation:
With respect to energy and power signals, in general, energy signals are electrical signals that are finite in their duration. That is, for example, the integral of the square of the voltage signal over its duration yields a finite value, which would be in units of joules if the integral is with respect to a one ohm normalized resistance. If you know the value of the resistance, then simply divide the result from the integral by this resistance. In essence, you are integrating the power dissipated by the resistance over the time duration in which the voltage signal across the resistance exists.
With respect to power signals, for example, periodic signals are classified as power signals. In this case, periodic signals have infinite energy but finite power.
In essence, energy signals are characterized with zero average power and finite energy; however, power signals are characterized with infinite energy and finite average power.
So if a signal is a power signal then the value at each point should be finite. An energy signal is one that has finite energy. So if you integrate the power over all time, it should be finite. ... The difference is that energy signals are square integrable, while power signals are not.