Howtosignalprocessing
- What is the difference between continuous and discrete signal?
- What is an energy and power of discrete signal?
- What is the main difference between discrete-time signal and digital signal?
- Which signal has finite energy?
What is the difference between continuous and discrete signal?
A continuous-time signal has values for all points in time in some (possibly infinite) interval. A discrete time signal has values for only discrete points in time. Signals can also be a function of space (images) or of space and time (video), and may be continuous or discrete in each dimension.
What is an energy and power of discrete signal?
The energy of a discrete-time signal x[n] is Ex=∞∑n=−∞|x[n]|2. An energy signal is a signal with finite energy (i.e., 0<Ex<∞). Physical Interpretation: Energy, in this context, does not refer to a specific physical property.
What is the main difference between discrete-time signal and digital signal?
What is the difference between digital signal and discrete signal? A digital signal has discretized time axis and discretized amplitude axis. Whereas a discrete signal has a discrete time axis and a continuous amplitude axis. And both are non continuous signal.
Which signal has finite energy?
An energy signal has finite energy E, so its average power P (which is averaged over an infinite duration T) must be zero. A power signal has finite average power P, so its energy E must be infinite. Periodic signals are power signals.
