credit by: Rifka Hayati a.k.a khalaftblack

1. Bandwidth Utilization:
Multiplexing and
Spreading
• Shamimi
• Aida
• Shira
• Rifka Hayati
Bandwidth Utilization: Multiplexing and Spreading 1

2. Definition
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 2

3. Bandwidth Utilization:
1 Multiplexing
2 Spreading
Bandwidth Utilization: Multiplexing and Spreading 3

4. Definition
Multiplexing:
“Multiplexing is the set of techniques that
allows the simultaneous transmission of
multiple signals across a single data link.”
Bandwidth Utilization: Multiplexing and Spreading 4

5. A dividing a link into channels
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6. Type of multiplexing
Analog Multiplexing Technique
Digital Multiplexing Technique
Frequency-Division Wavelength-Division Time-Division
Multiplexing Multiplexing Multiplexing
“A analog multiplexing “A analog multiplexing “A digital multiplexing
technique to combine technique to combine technique to combine
analog signals” optical signals” several low-rate
channels into one
hight rate one”
Synchronous Asynchronous/
Statictical
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7. 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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8. 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.
Bandwidth Utilization: Multiplexing and Spreading 8

9. Wavelength-Division Multiplexing
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10. Wavelength-Division Multiplexing
Bandwidth Utilization: Multiplexing and Spreading 10