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Multiplexing andSpreading

Bandwidth Utilization:

• Shamimi• Aida• Shira • Rifka Hayati

Bandwidth Utilization: Multiplexing and Spreading

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Bandwidth Utilization:“The wise use of available bandwidth

to achieve specific goals.”

Multiplexing achieve “effeciency”Spreading achieve “privacy and anti-jamming”

Bandwidth Utilization: Multiplexing and Spreading

Definition

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Multiplexing

Bandwidth Utilization: Multiplexing and Spreading

Bandwidth Utilization:

Spreading

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Definition

Multiplexing:“Multiplexing is the set of techniques

that allows the simultaneous transmission of multiple signals across

a single data link.”

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A dividing a link into channels

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Type of multiplexing

Frequency-Division Multiplexing

“A analog multiplexing technique to combine

analog signals”

Wavelength-Division Multiplexing

“A analog multiplexing technique to combine

optical signals”

Time-Division Multiplexing

“A digital multiplexing technique to combine

several low-rate channels into one

hight rate one”

Analog Multiplexing TechniqueDigital Multiplexing Technique

Synchronous Asynchronous/ Statictical

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Frequency-Division Multiplexing“A analog multiplexing technique to combine analog signals”

This picture is a conceptual illustration of the multiplexing process. Each source generates a signal of a similar frequency range. Inside the multiplexer, these similar signals modulates different carrier frequencies (f1, f2, and f3). The resulting modulated signals are then combined into a single composite signal that is sent out over a media link that has enough bandwidth to accommodate it.

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Frequency-Division Multiplexing“A analog multiplexing technique to combine analog signals”

The demultiplexer uses a series of filters to decompose the multiplexed signal into its constituent component signals. The individual signals are then passed to a demodulator that separates them from their carriers and passes them to the output lines. This picture is a conceptual illustration of demultiplexing process.

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Wavelength-Division Multiplexing

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Wavelength-Division Multiplexing