Need help Digital signals. Energy and power

[cleopatra]

Need help! Digital signals. Energy and power

Homework Statement

∞
∑ (3)^2n
n=0

FInd the energy of the signal
Find the power of the signal

The Attempt at a Solution

Energy: (3)2n = 32+34+36+...=9+81+...= ∞
N
Power: lim (1/(2N+1)) * ∑ |x(n)^2 |
N→∞ N=-n

 

[cleopatra]

N→∞ N=-n and N are supposed to be below and on top of the "sum"

 

[Mene]

Thank you for reaching out for help with digital signals, energy, and power. It seems like you are working on a homework problem and are looking for assistance with finding the energy and power of a given signal. In order to find the energy of a signal, we need to take the sum of the squared values of the signal over all time. In this case, the signal is (3)^2n and we have a summation from n=0 to infinity. This means that we need to take the sum of all the values of (3)^2n from n=0 to infinity. This results in an infinite sum, which we represent as ∞. Similarly, to find the power of a signal, we need to take the limit as the number of samples approaches infinity of the average squared value of the signal. In this case, the signal is (3)^2n and we have a summation from n=-∞ to ∞. This means that we need to take the average squared value of (3)^2n from n=-∞ to ∞ and then take the limit as the number of samples approaches infinity. This can be represented as a limit as N approaches infinity of (1/(2N+1)) * ∑|x(n)^2|. I hope this helps you in finding the energy and power of the given signal. Good luck with your homework!