Comb Filters If H(e/o) exhibits a peak at op, then G(eo) will exhibit L peaks at ok/L,0≤k≤L-1 in the frequency range0≤o<2兀 Likewise, if ( H(e/o)l has a notch at Oo then G(e/ o)l will have L notches at Ok/L 0≤k≤L-1 in the frequency range0≤o<2π a comb filter can be generated from either an Fir or an iir prototype filter Copyright C 2001, S K Mitra3 Copyright © 2001, S. K. Mitra Comb Filters • If exhibits a peak at , then will exhibit L peaks at , in the frequency range • Likewise, if has a notch at , then will have L notches at , in the frequency range • A comb filter can be generated from either an FIR or an IIR prototype filter | ( )| jw H e | ( )| jw H e | ( )| jw G e | ( )| jw wp G e wo wp k/L wo k/L 0  k  L −1 0  k  L −1 0  w 2p 0  w 2p