Digital Filters deal only with samples, right?

1. What does a digital filter do?
2. What are the 4 categories of digital filtering?
3. What are the main types of digital filters?
4. Why digital filters are important in communication systems?

What does a digital filter do?

Digital filters are used for two general purposes: (1) separation of signals that have been combined, and (2) restoration of signals that have been distorted in some way. Analog (electronic) filters can be used for these same tasks; however, digital filters can achieve far superior results.

What are the 4 categories of digital filtering?

There are two categories of digital filter: the recursive filter and the nonrecursive filter. These are often referred to as infinite impulse response (IIR) filters and finite impulse response (FIR) filters, respectively.

What are the main types of digital filters?

There are two fundamental types of digital filters: finite impulse response (FIR) and infinite impulse response (IIR).

Why digital filters are important in communication systems?

One of the most important applications for digital signal processing in communications equipment is filtering. Filtering allows the selection of the desired signal and the rejection of unwanted signals and noise.