FIR Filter

The FIR filter which is practicable realisable. The frequency response of the filter is multiplied with an appropriate function(known as window function) to design a desired FIR filter . On multiplication, we actually truncate infinite sample values of transfer function. Window function is selected on the basis of transition width criteria(which is filter width>= window width). We will obtain the desired FIR filter  by the implementing appropriate window function with FIR filter algorithm.