solution

Repeat Problem 16.1, but continue to increase the bit rate until the interference ratio R is close to −35 dB.

Convert the constant bandwidth subcarrier FM/FM package of Problem 3.12 into a FM/FM + PCM/FM by adding a 25-Kbps bit sequence. For the bit sequence, let Df = 0.41 Rb, f 3dB (pm) = 0.7Rb and six order filter, and fm (3-dB point of the lowpass filter separating the bit sequence) = Rb . Determine: (a) the interference ratio R, (b) f dn , (c) Bc , (d) the composite [S /N ]o for the lowest frequency subcarrier channel, and (e) [S /N ]opcm . Compare Df to f dnc .