Simple FIR Digital Filters The magnitude response Ho(e )=coS(o/2) can be seen to be a monotonical decreasing function of@ First-order FIR lowpass filter 0.8 306 0.6 Copyright C 2001, S K. MitraCopyright © 2001, S. K. Mitra 6 Simple FIR Digital Filters • The magnitude response can be seen to be a monotonically decreasing function of w | ( )| cos( / 2) 0 = w jw H e 0 0.2 0.4 0.6 0.8 1 0 0.2 0.4 0.6 0.8 1 w/p Magnitude First-order FIR lowpass filter