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Frequency-division multiplexing, wavelength-division multiplexing, and time-division multiplexing.

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Frequency-division multiplexing and wavelength-division multiplexing

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What is multiplexing and its diagram

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application of multiplexing in data communication

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what is function of amplitude division multiplexing

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In analog transmission, signals are commonly multiplexed using frequency-division multiplexing (FDM)

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Downward multiplexing refers to distributing a single signal across multiple channels.

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Multiplexing is the process of combining multiple signals over one media line. There are several types of multiplexing: frequency division, time division, and wavelength division.

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multiplexing refeers to the transmission of different signals in the same channel simultaneously. There are many forms of multiplexing that can be used, including frequency division multiplexing(FDM) where individual signals are transmitted over adjacent , non overlapping frequency bands. they are transmitted in parallel and simultaneously in time. In time division multiplexing(TDM) each signal is allowd to use the whole bandwidth for a certain period of time. Multiplexing is needed so that the available channel can be used efficiently and also to save costs. There is too much to know about multiplexing, here is just a short overview. One thing that one has to know is multiple access.

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Multiplexing techniques vary widely based on what is being multiplexed. Modern telecommunications use a very wide array of techniques including:

TDM - examples: TDMA, T-carrier

FDM - examples: DWDM

Spatial - example: MIMO

Code division - examples: CDMA

Phase or polarization division - cable/satellite TV

Statistcal - examples: packet mode (STS), FHSS etc etc.

This is far from a complete list. I think the question needs to be more specific.

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Does Cable television use time-division multiplexing

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Orthogonal frequency division multiplexing is special case of frequency division multiplexing where a ling serial data streams are divided into parallel data streams and each data stream is multiplied either by orthogonal frequency or code. when multiplied by code known as frequency code division multiplexing and when multiplied by orthogonal frequency then know as orthogonal frequency division multiplexing

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Orthogonal frequency-division multiplexing

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Inverse multiplexing

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Multiplexing-Combining all the inputs into one output.

Switching-Taking one input to the output, at a time/frequency

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This process is called multiplexing. Multiplexing allows multiple signals to be combined into a single transmission medium in order to optimize bandwidth usage and facilitate efficient communication.

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  • Data selection and routing
  • Control sequencer

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disadvantages of wavelenth division multiplexing

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WDM wavelength division multiplexing

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Dense Wavelength Division Multiplexing

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If you have less no of data than the no of bits of data or address to b transfer Multiplexing mean to manage given busses in such a way that data or address can be transferred perfectly

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  1. AM radio broadcasting uses frequency division multiplexing to allocate different frequencies to different radio stations.
  2. Cable television systems use frequency division multiplexing to transmit multiple channels simultaneously over a single cable.
  3. Cell phone networks use frequency division multiplexing to separate different users' calls on the same frequency band.

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WDM wavelength division multiplexing

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SONET uses an inverse multiplexing technique called virtual concatenation. SONET, which is the standard used in the United States and most of Europe, stands for Synchronous Optical Network.

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Jun Zheng has written:

'Optical WDM networks' -- subject(s): Fiber optics, Multiplexing, Optical communications, Routers (Computer networks), Wavelength division multiplexing

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Carries multiple signal on a signal medium.

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Approximately 14 Tera bits per second over 160 Km using wavelength division multiplexing and rising every year as multiplexing techniques develop.

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Andrea Borella has written:

'Wavelength division multiple access optical networks' -- subject(s): Multiplexing, Wave length, Congresses, Wavelength division multiplexing, Light, Optical communications

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Frequency division multiplexing is when a communication medium divides its frequency in order to carry a number of different signals at once. Broadband DSL uses this to transport large amounts of data quickly.

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If only one network address is available on a host, all transport connections on that machine have to use it. When a TPDU comes in, some way is needed to tell which process to give it to. This situation, called upward multiplexing. While if a user needs more bandwidth than one virtual circuit can provide, a way out is to open multiple network connections and distribute the traffic among them on a round-robin basis. This modus operandi is called downward multiplexing.

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