Linear-Phase FIR Transfer Functions In the general case for Type 1 FIR filters the frequency response is of the form H(e10)=e j/2 H(0) where the amplitude response h(o), also called the zero-phase response, is of the form N/2 H(0)=,]+2∑h少-n]cos(on Copyright C 2001, S K MitraCopyright © 2001, S. K. Mitra 9 Linear-Phase FIR Transfer Functions • In the general case for Type 1 FIR filters, the frequency response is of the form where the amplitude response , also called the zero-phase response, is of the form ( ) ( ) / 2 = w w − w H e e H j jN ~ H (w) ~ H (w) ~ = +  − w = / 2 1 2 2 [ ] 2 [ ]cos( ) N n N N h h n n