7.1 Linear-phase FIR transfer function It follows the relation H(2)=+z (N-1) H(2-) that if z=z is a zero o fH(2), So 1s 2=1/Zi Moreover, for an FIR filter with a real impulse response, the zeros of H(z)occur in complex conjugate pairs Hence, a zero at z=zi is associated with a zero at z=z7.1 Linear-phase FIR transfer function