6.1
Chapter 6
Bandwidth Utilization:
Multiplexing and
Spreading
Docsity.com
Prepare for your exams
Study with the several resources on Docsity
Earn points to download
Earn points by helping other students or get them with a premium plan
Guidelines and tips
Prepare for your exams
Study with the several resources on Docsity
Earn points to download
Earn points by helping other students or get them with a premium plan
Bandwidth Utilization-Data Communication and Computer Networks-Lecture Slides, Slides of Data Communication Systems and Computer Networks
These are a set of Lecture Slides on the subject of Data Communication and Computer Networks at Univeristy of Delhi by Dr. Sonam Zinta. It includes: Bandwidth, Utilization, Multexing, Spreading, Efficiency, Privacy, Anti-jamming, Channels, Time-division
Typology: Slides
2011/2012
1 / 49
This page cannot be seen from the preview
Don't miss anything!
Related documents
Partial preview of the text
Download Bandwidth Utilization-Data Communication and Computer Networks-Lecture Slides and more Slides Data Communication Systems and Computer Networks in PDF only on Docsity!
Chapter 6
Bandwidth Utilization:
Multiplexing and
Spreading
Docsity.com
Bandwidth utilization is the wise use of
available bandwidth to achieve
specific goals.
Efficiency can be achieved by
multiplexing; privacy and anti-jamming
can be achieved by spreading.
Note
Docsity.com
Figure 6.1 Dividing a link into channels
Docsity.com
Figure 6.2 Categories of multiplexing
Docsity.com
FDM is an analog multiplexing technique
that combines analog signals.
Note
Docsity.com
Figure 6.4 FDM process
Docsity.com
Assume that a voice channel occupies a bandwidth of 4 kHz. We need to combine three voice channels into a link with a bandwidth of 12 kHz, from 20 to 32 kHz. Show the configuration, using the frequency domain. Assume there are no guard bands.
Solution We shift (modulate) each of the three voice channels to a different bandwidth, as shown in Figure 6.6. We use the 20- to 24-kHz bandwidth for the first channel, the 24- to 28-kHz bandwidth for the second channel, and the 28- to 32-kHz bandwidth for the third one. Then we combine them as shown in Figure 6.6.
Example 6.
Docsity.com
Figure 6.6 Example 6.
Docsity.com
Figure 6.7 Example 6.
Docsity.com
Figure 6.9 Analog hierarchy
Docsity.com
Figure 6.10 Wavelength-division multiplexing
Docsity.com
WDM is an analog multiplexing
technique to combine optical signals.
Note
Docsity.com
Figure 6.12 TDM
Docsity.com
TDM is a digital multiplexing technique
for combining several low-rate
channels into one high-rate one.
Note
Docsity.com