eq 4.25 is given below

4.5-1 A vestigial filter H;(f) shown in the transmitter of Fig. 4.21 has a transfer function as shown in Fig. P4.5-1. The carrier frequency is fe = 10 kHz and the baseband signal bandwidth is 4 kHz. Find the corresponding transfer function of the equalizer filter Ho(f) shown in the receiver of Fig. 4.21. Hnt: Use Eq. (4.25). Figure P.A.5-1 H;(f)| 9. 10 11 12 14 f kHz