Types of Signals
Q1. What is signal?
Signal is a fundamental quantity which transfer information in the form of waves through a transmissible medium.
Q2. What is the difference between amplitude and magnitude of a signal?
Amplitude of a signal is a vector quantity which tells the maximum displacement of signal’s wave. It depicts both strength and direction of a signal. Magnitude of a signal is a scalar quantity which only depicts the strength of a signal.
Q3. What is the impact of noise on quality of a signal?
Noise during signal transmission causes distortion of waves of signal which degrades the quality and reliability of information which is to be transferred through the signal.
What are the Different Types of Signals?
An electrical signal is a physical quantity that varies with time. It varies with any dependent or independent quantity. A signal can either be one-dimensional or multi-dimensional. When the function which varies with time depends only on a single variable then that type of signal is referred to as a one-dimensional signal. Examples of such signals are audio signals, biometrics like pulse or heartbeat, light wave signals, etc. On the other hand, a signal that is dependent on more than one time-dependent variable, then that type of signal is known as a multi-dimensional signal. Examples of two-dimensional signals are electromagnetic signals, video signals, etc. A signal is a mathematical representation of energy.
Thus, signal is a time-dependent function that can be dependent on one or more than one physical quantity for the transference of data and information with or without the presence of the medium. Electromagnetic wave signals can travel in a vacuum whereas sound and electrical signals require a medium for their propagation.
Table of Content
- Signals
- Characteristics of Signal
- Operations on Signal
- Classification of Electric Signals
- Applications of Signals
- Advantages of Signals
- Disadvantages of Signals