Why is energy signal having a finite energy value and 'zero value of power'

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Discussion Overview

The discussion revolves around the characteristics of energy signals and power signals in signal processing, specifically addressing why energy signals have finite energy values and zero power, while power signals have finite power values and infinite energy. The scope includes conceptual clarification and technical reasoning.

Discussion Character

  • Conceptual clarification, Technical explanation, Debate/contested

Main Points Raised

  • Some participants inquire about the relationship between energy signals and power signals, specifically why energy signals have finite energy and zero power.
  • One participant suggests that the definitions of average power and energy are relevant, referencing the equations: Average Power = Total Energy / time and Energy = ∫(Power)dt.
  • Another participant asserts that the concept is general and does not depend on time.
  • It is noted that a power signal lasts indefinitely, leading to the conclusion that a finite energy signal must have zero power, while a power signal, due to its perpetual nature, results in infinite energy unless it has zero average power.

Areas of Agreement / Disagreement

Participants express differing views on the implications of time in defining energy and power signals, with some asserting that the concepts are independent of time while others emphasize the role of time in these definitions. The discussion remains unresolved regarding the nuances of these definitions.

Contextual Notes

Limitations include potential ambiguities in the definitions of energy and power signals, the dependence on the time interval considered, and the implications of average power calculations.

Who May Find This Useful

Readers interested in signal processing, electrical engineering, and related fields may find this discussion relevant for understanding the properties of energy and power signals.

grafica
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Energy signal?

hai..
i want to know why is energy signal having a finite energy value and 'zero value of power'
similarly the power signal have finite value of power and an INFINITE VALUE OF ENERGY
 
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grafica said:
hai..
i want to know why is energy signal having a finite energy value and 'zero value of power'
similarly the power signal have finite value of power and an INFINITE VALUE OF ENERGY

HINT(S):
1) (Average) Power = (Total) Energy / time
2) [tex]Energy=\int(Power)dt[/tex]
3) How much time do you calculate over?
 


hi
it is the general concept irrespective of time
 


grafica said:
hi
it is the general concept irrespective of time

Yes, but a power signal lasts forever. A (finite) energy signal thus has 0 power. A power signal, because of how long it lasts (forever) will also have infinite energy. Unless there's 0 average power.
 

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