Overview of signals and systems
Signals and Systems Tutorial
Presentation of signals and systems
What is the signal?
The signal is a time varying physical phenomenon intended to convey information.
The signal is a function of time.
OR The signal is a function of one or more independent variables, which contain information.
Example: voice signal, video signal, signals on telephone wires, etc.
Note: Noise is also a signal, but information conveyed by noise is undesirable and is therefore considered undesirable.
Qu is the system?
The system is a device or a combination of devices, which can operate on signals and produce a corresponding response. The input of a system is called excitement and exitof it is called response.
For one or more inputs, the system can have one or more outputs.
Example: Communication system