User talk:Partha157

One of the basic problem in basic telecommunication engineering is the analysis and design of the system, which allows many individual messages to be transmitted simultaneously with a single communication channel. And for this Multiplexing theory came into vision and such multiple transmission over a single channel may be achieved consists in translating each message to a different position in the frequency spectrum.Such multiplexing is called frequency Multiplexing.

The individual message can eventually be separated by a filter. Frequency multiplexing involves the use of an auxiliary waveform, that is usually sinusoidal,called a carrier.The operation performed on the signal to achieve frequency multiplexing result in the generation of a waveform which may be described as the carrier modified in that it's amplitude, frequency or phase, individually or in combination,varies with time.such a carrier is called modulated carrier.