Multiplexing

Why Multiplexing

• The transmission medium is used to send the signal from sender to receiver. The medium can have one signal over a time.
• If there are multiple signal to share one medium, then the medium must be divied in such a way that each signal is given some portion of available bandwidth.
• When multiple signal share common medium, there is a possibility of collision. Multiplexing concept is used to avoid collision.

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Introduction to Multiplexing

It is a technique used to combine and send the multiple data streams over a medium. This process of combining the data stream is known as multiplexing and hardware used for multiplexing is called multiplexer.

Multiplexer: Combines n input lines to generate a single output line.
Demultiplexer: Separates a signal into its component signals.

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Multiplexing Techniques

1. Frequency Division Multiplexing
2. Wavelength Division Multiplexing
3. Time Division Multiplexing