What is multiplexing? Distinguish between frequency division and time division multiplexing.

Multiplexing is that the method of permitting multiple signals from totally different sources to share common channel. that's one channel is employed by totally different signal sources to send their signals.

Some types of multiplexing are:

(a) TDM (Time Division Multiplexing
(b) FDM (Frequency Division Multiplexing)
(c) WDM (Wavelength Division Multiplexing)
(d) CDM (Code Division Multiplexing

TDM: In TDM signals area unit separated in time domain. Signals from varied sources area unit allowed to flow through the common line one at a time for fastened time. Suppose there area unit four signal sources, then every signal supply are allowed to use line for a amount t. Once all signal sources transmit for amount t, the primary one once more get likelihood so on.

FDM: In FDM signals area unit separated in frequency domain. Signal from every supply is modulated to totally different frequency in order that the frequency spectrum once modulation won't overlap. At receiving finish, signals area unit demodulated. (i.e. translated back to original frequency).

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