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Hi, I have trouble understanding these concepts

http://cnx.org/content/m10055/latest/

if I understand is correctly, the energy is basically a number telling us how "big" a signal is

while the power, is used for signals that don't decay, thus give us a infinite amount of energy, but still we need to find a measurement for how "big" these signals are and hence we use the concept of "signal power"

is this correct? I'm not really sure about it 100%

also what's the point of these measurements?

thanks in advance

http://cnx.org/content/m10055/latest/

if I understand is correctly, the energy is basically a number telling us how "big" a signal is

while the power, is used for signals that don't decay, thus give us a infinite amount of energy, but still we need to find a measurement for how "big" these signals are and hence we use the concept of "signal power"

is this correct? I'm not really sure about it 100%

also what's the point of these measurements?

thanks in advance

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