– It is an analog technique.– Signals of different frequencies are combined into a composite signal and is transmitted on the signal link.
– Bandwidth of link should be greater than the combined bandwidth of various channels.
– Each signals have different frequencies.
– Channels are separated by strip of unused bandwidth called Guard bands to prevent from overlapping.Application:
– FDM is used for FM and AM radio broadcasting.
– FDM is used for television broadcasting.
– First generation telephone also use FDM.