Group Delay Analysis of IIR Butterworth Filter for different Orders
Rajesh Mehra · 2014
Generally Digital Signal Processing is Mathematical manipulation of the signals. The manipulation parameters may get differ from one technique to another. In this paper IIR Butterworth filters has been designed for various orders to analyze group delay. The developed IIR filters are designed and simulated using matlab with different filter orders. The simulated results shows that IIR filters with lower order have better group delay. Whereas IIR filters with higher filter order shows better magnitude response. This results because, as the signal passes through more processes, the distortion increases which result in non linearity and then in group delay.