Need help Digital signals. Energy and power

AI Thread Summary
The discussion revolves around calculating the energy and power of a digital signal represented by the series ∑ (3)^(2n) from n=0 to infinity. The energy of the signal is determined to be infinite due to the divergence of the series. For power, the calculation involves finding the limit of the average power over an increasing interval, which is expressed as lim (1/(2N+1)) * ∑ |x(n)^2| as N approaches infinity. The participants are focused on resolving the mathematical expressions correctly to derive the energy and power values. Ultimately, the challenge lies in handling the infinite nature of the series and applying the correct limits for power calculation.
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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
 
Physics news on Phys.org


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

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