| Line 12: | Line 12: | ||
equals to Y(k+t)[n]=<math>(k+t+1)^2</math> δ[n-(k+t+1)] | equals to Y(k+t)[n]=<math>(k+t+1)^2</math> δ[n-(k+t+1)] | ||
| + | |||
| + | while | ||
| + | |||
| + | Xk[n]=δ[n-k] -> system -> time delay | ||
| + | |||
| + | equals to Yk[n]=<math>(k+1)^2</math> δ[n-(k+1)]->time delay | ||
Revision as of 15:37, 10 September 2008
The system is not time invariant
Let time delay = t
then
Xk[n]=δ[n-k] -> time delay -> system
equals to X(k+t)[n]=δ[n-(k+t)]->system
equals to X(k+t)[n]=δ[n-k-t]->system
equals to Y(k+t)[n]=$ (k+t+1)^2 $ δ[n-(k+t+1)]
while
Xk[n]=δ[n-k] -> system -> time delay
equals to Yk[n]=$ (k+1)^2 $ δ[n-(k+1)]->time delay
