Classification of Signals Explained | Types of Signals in Communication

In this video, the classification of the signals from the communication engineering perspective is explained with examples.

By watching this video, you will learn the following topics:

0:00 Introduction
0:57 Continuous-time signal and Discrete-time signal
1:48 Analog and Digital Signal
4:06 Periodic and Aperiodic Signal
4:52 Energy and Power Signal
9:26 Deterministic and Random Signal

Classification of Signals:

In the general the signal can be classified in the following categories:

1) Continuous-time signal and Discrete-time signal
2) Analog and Digital Signal
3) Periodic and Aperiodic Signal
4) Energy and Power Signal
5) Deterministic and Random Signal

1) Continuous-time signal and Discrete-time signal

Continuous-time signal:
If the signal is specified for every value in time then it is known as the Continuous-time signal

Discrete-time signal:
If the signal is specified only for discrete-time instances then it is called Discrete-time signal.

2) Analog and Digital Signal:

Analog Signal:
A signal whose amplitude can take any value in the continuous range is the analog signal.

Digital Signal:
A signal whose amplitude can take only a finite number of values is the digital signal.

3) Periodic Signal and Aperiodic Signal

Periodic Signal: The signal which repeats itself after some finite time is known as a periodic signal.

4) Energy and Power Signal:

The signal with finite energy is known as the energy signal while the signal with finite power is known as Power Signal.

The signal could be either an energy signal or a power signal, but it can't be both at the same time.
There are some signals (e.g ramp signal) which are neither energy nor power signals

5) Deterministic and Random Signal:

A signal whose physical description is known completely either in mathematical form or graphical form is known as the Deterministic Signal.

A signal which is known only in terms of the probabilistic description like mean, mean square value, and distributions is known as the Random Signal.

In this video, the classification of the different signals is explained with examples.

This video will be helpful to everyone in understanding the classification of the signals.

#ClassificationOfSignal
#TypesOfSignals
#AnalogAndDigitalCommunication
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