7.1 Linear-phase FIR transfer function o Type 2 FIR Transfer Function The impulse response of a Type2 FiR filter is of even length that is, the degree n is odd and satisfies the symmetry condition Its amplitude response Hg (a) is given by H2(o)=∑2h(n) coSo(n-T7.1 Linear-phase FIR transfer function  Type 2 FIR Transfer Function The impulse response of a Type2 FIR filter is of even length, that is, the degree N is odd and satisfies the symmetry condition. Its amplitude response Hg(ω) is given by ( ) ( ) ( ) 1 1 2 0 2 cos N g n H h n n      − −     = = −     