Continuous Time
Let’s say we have:
- Signal
- Signal , which is delayed by seconds
Thus:
and
If , it is delayed (shift to the right) If , it is advanced (shift to the left)
Discrete Time
Like C.T., we have:
To shift a discrete time signal by units, we replace with . If , it is delayed (shift to the right) If , it is advanced (shift to the left)