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What Is A Signal?

Understand the concept of signal based on the perspective of an Applied Physicist

Before we hop into signals, we should know what data is. Data is a set of information that is collected through observation of different variables. There are two types of processing; changing signal according to the requirement and secondly how to take out the useful data from the signal.

An applied physicist uses a mathematical model to develop a set of equations which lead to the solution of the practical problem. They then provide the solution to an engineer who uses it to solve the problems.

Signal:

Signal is a represented by a function in signals & systems. A signal carries information which is then taken out by processing the signal further.

We can categorize a signal based on various factors;

1. Continuous or discrete: If the value of time for any function of a signal is infinite on any specific point of the signal, then the signal is continuous whereas if the value of time for any function on any specific point of the signal is finite then the signal is discrete.
2. Deterministic or random: Signals of which we can derive a mathematical equation or a set of equations are deterministic signals. Whereas those signals for…