Linear-Phase FIR Transfer Functions The above transfer function has a linear phase, if its impulse response hn] is either symmetric, 1.e hn]=hN-n],0≤n≤N or is antisymmetric, 1.e hn]=-h[N-n],0≤n≤N Copyright C 2001, S K MitraCopyright © 2001, S. K. Mitra 2 Linear-Phase FIR Transfer Functions • The above transfer function has a linear phase, if its impulse response h[n] is either symmetric, i.e., or is antisymmetric, i.e., h[n] = h[N − n], 0  n  N h[n] = −h[N − n], 0  n  N