Finite impulse response

Hey kiddo, do you know what a response means? When someone says something to you, you can answer them, and that's a response! Similarly, in the world of electronic signals, when one signal goes into a system, the system gives a response. Now, let's learn about a specific type of system which is called a Finite Impulse Response or FIR.

Imagine you are playing with a ball, and you throw it against a wall. When it hits the wall, it bounces back. Similarly, when a signal goes into a system, it bounces back with a response after some time. However, an FIR system only responds for a fixed time, unlike many other systems which give a response forever.

Think of the response of an FIR system like a bell. When you ring a bell, it makes a sound for a while, but eventually it stops ringing. This is exactly how an FIR system works. It takes the input signal and gives a response, but only for a specific length of time before it stops.

Now, let's break down the meaning of 'finite impulse response.' The word 'finite' means something that is limited or fixed. 'Impulse' refers to a sudden change in the signal being inputted into the system. The impulse can be thought of as a single push on a swing. The system responds to the input impulse, and the response is also limited or fixed.

So, to sum it up, Finite Impulse Response (FIR) is a system that responds to an input signal for a fixed time period and gives a limited or fixed response to the input. It's like ringing a bell - it makes a sound for a while after you hit it, but it eventually stops.