The world is increasingly streaming with electronic gadgets, a few for necessity but most for luxury. Irrespective of the category to which they fall-into, we can notice the basic fact that all of them make use of ‘signals’ to accomplish their tasks.

Now, is it just enough to have signals? No, absolutely not. When we have signals, at some point of time, we will, for sure, come-up with a need to process them. All such signal manipulating operations can be grouped under a common but a very broad branch named “Signal Processing”.

Depending on the complexity involved in processing a signal, we can classify the signal operations into two broad categories.

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