(New page: (a) Compute the energy E infinity y[n]=e^2+j4.71235n <n><math>lim</math> from T to -T as T goes to infinity |y[n]|^2 |y[n]|^2= (e^2.e^jw)^2 = e^4.1 = e^4 using the E infi...) |
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Revision as of 13:40, 30 June 2008
(a) Compute the energy E infinity
y[n]=e^2+j4.71235n <n>$ lim $ from T to -T as T goes to infinity |y[n]|^2 |y[n]|^2= (e^2.e^jw)^2
= e^4.1
= e^4
using the E infinity formula from the textbook
=[e^4](T-(-T) =2e^4T =inf
(b) lim T->inf and integrate from -2 to 2 because of function delta(t+2)-delta(t-2) Use the same formula above.
=[e^4](2+2) =4e^4
