Energy and Power of Signals

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Periodic signals are power signals; nonperiodic signals (pulses) are energy signals. When both power and energy are infinite, the signal is neither a power nor an energy signal. As a matter of fact, a true power signal cannot exist in the real world because it would require a power source that operates for an infinite amount of time.

Contributed by: Daniel de Souza Carvalho (March 2011)
Open content licensed under CC BY-NC-SA


Snapshots


Details

To calculate energy:

To calculate power:

B. P. Lathi, Modern Digital and Analog Communication Systems, 3rd ed., New York: Oxford University Press, 1998.



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