Linear-Phase FIR Transfer Functions Since the length of the impulse response can be either even or odd, we can define four types of linear-phase FIr transfer f unctions For an antisymmetric fir filter of odd length, 1. e..N even h[N2]=0 We examine next the each of the 4 cases Copyright C 2001, S K MitraCopyright © 2001, S. K. Mitra 3 Linear-Phase FIR Transfer Functions • Since the length of the impulse response can be either even or odd, we can define four types of linear-phase FIR transfer functions • For an antisymmetric FIR filter of odd length, i.e., N even h[N/2] = 0 • We examine next the each of the 4 cases