Linear-Phase fir Transfer Functions The phase function here is given by 6(0)=-40+β whereβ is either0orπ, and hence, It is a linear function of o in the generalized sense The group delay is given by τ(0) de(o) 4 indicating a constant group delay of 4 samples 8 Copyright C 2001, S K MitraCopyright © 2001, S. K. Mitra 8 Linear-Phase FIR Transfer Functions • The phase function here is given by where b is either 0 or , and hence, it is a linear function of w in the generalized sense • The group delay is given by indicating a constant group delay of 4 samples (w) = −4w+b ( ) 4 ( )  w = − = w  w d d