*2.3.2 FDM receiver*

The following block diagram (**Figure 7**) shows the concept of demodulation of FDM signal at the receiving side. The antenna receives the multiplexed modulated signal from the transmitter. This signal will be weak at the receiver. Therefore it is necessary to amplify the signal. This is done at the initial stage of the receiver. The amplified signal is then forwarded to the demodulator. The output of the

**Figure 6.** *Block diagram of FDM transmitter.*

**Figure 7.** *Block diagram of FDM receiver.*

demodulator will be given to the band-pass filters which are well designed with the central frequencies of the carriers as used individually at the transmitting side. Thus the output of each BPF will be the same as that of the originally modulated output of the corresponding modulator.

Then we use the corresponding individual demodulators to recover the original signal.
