11-05-2013, 12:10 PM
MULTIPLEXING
[attachment=53738]
INTRODUCTION
Under the simplest conditions, a medium can carry only one signal at any moment in time.
In telecommunications and computer networks, multiplexing (also known as muxing) is a method by which multiple analog message signals or digital data streams are combined into one signal over a shared medium.
Multiplexing costs less.
frequency DIVISION MUltipleXING
Frequency-division multiplexing (FDM) is inherently an analog technology
Assignment of non-overlapping frequency ranges to each “user” or signal on a medium. Thus, all signals are transmitted at the same time, each using different frequencies.
A multiplexor accepts inputs and assigns frequencies to each device
WAVELENGTH DIVISION MUltipleXING
WDM is designed to use the high data rate
capability of fiber optic cable.
WDM is conceptually the same as FDM,except
the multiplexing and demultiplexing involves
optic signals transmitted through fiber
optic channels.
Each signal carried on the fiber can be
transmitted at a different rate from the
other signals.
Conclusion
With all the discussion it is clear that the multiplexing is revolutionary innovation in the field of communication.
With the use of multiplexing the complexity of transmission of data simultaniously is decreases so far,
[attachment=53738]
INTRODUCTION
Under the simplest conditions, a medium can carry only one signal at any moment in time.
In telecommunications and computer networks, multiplexing (also known as muxing) is a method by which multiple analog message signals or digital data streams are combined into one signal over a shared medium.
Multiplexing costs less.
frequency DIVISION MUltipleXING
Frequency-division multiplexing (FDM) is inherently an analog technology
Assignment of non-overlapping frequency ranges to each “user” or signal on a medium. Thus, all signals are transmitted at the same time, each using different frequencies.
A multiplexor accepts inputs and assigns frequencies to each device
WAVELENGTH DIVISION MUltipleXING
WDM is designed to use the high data rate
capability of fiber optic cable.
WDM is conceptually the same as FDM,except
the multiplexing and demultiplexing involves
optic signals transmitted through fiber
optic channels.
Each signal carried on the fiber can be
transmitted at a different rate from the
other signals.
Conclusion
With all the discussion it is clear that the multiplexing is revolutionary innovation in the field of communication.
With the use of multiplexing the complexity of transmission of data simultaniously is decreases so far,