Simple FIR Digital Filters The magnitude response Ho(eo)=cos(o/2) can be seen to be a monotonical decreasing function of o First-order FIr lowpass filter 0.8 06 0.4 0 0.4 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