Multiplexing
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Transcript of Multiplexing
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Group MemberShafqat ullah (2k11-coe-08)
YouSuf Nazir(2011-coe-17)JamShaid ali(2011-coe-10)
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Multiplexing is the set of techniques that allows the simultaneous transmission of multiple signals across a single data link.
Multiplexing (also called muxing ) is a method by which multiple analog message signals or digital data streams are combined into one signal
Example:In telecommunications, several telephone call may be
carried using one wire.
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A Multiplexer (MUX) is a device that combines several signals into a single signal.
A Demultiplexer (DEMUX) is a device that performs the inverse operation.
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Multiple low data rate signals are multiplexed over a single high data rate link, then de-multiplexed at the other end.
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Space-division multiplexing (SDM)Frequency-division multiplexing (FDM)Time-division multiplexing(TDM)Code division multiplexing (CDM)Wave Division Multiplexing
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Categories of Multiplexing
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Time-division multiplexing (TDM) is a digital process that can be applied when the data rate capacity of the transmission medium is greater than the data rate required by the sending and receiving devices.
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TDM
TDM is a digital multiplexing technique to combine data.
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TDM can be implemented in two ways: synchronous TDM and asynchronous TDM.
In synchronous time-division multiplexing, the term synchronous means that the multiplexer allocates exactly the same time slot to each device at all times.
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TDM frames
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Figure 6.21 Multiplexing and inverse multiplexing