Digital filters are of two types. Finite Impulse Response Digital Filter & Infinite Impulse Response Digital Filter.
DIFFERENCE BETWEEN FIR FILTER AND IIR FILTER
STRUCTURES FOR FIR SYSTEMS
FIR Systems are represented in four different ways
1. Direct Form Structures
2. Cascade Form Structure
3. Frequency-Sampling Structures
4. Lattice structures.
1. DIRECT FORM STRUCTURE OF FIR SYSTEM
The convolution of h(n) and x(n) for FIR systems can be written as
