network operations & administration cs 4592 lecture 8
DESCRIPTION
Network Operations & administration CS 4592 Lecture 8. Instructor: Ibrahim Tariq. Quiz. Quiz. Q3Five 6 Kbps connections are multiplexed together. A unit is 1 bit Find a) The duration of 1 bit at input b) the duration of 1 bit output c) output bitrate d) output frame duration - PowerPoint PPT PresentationTRANSCRIPT
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Network Operations & administration
CS 4592Lecture 8
Instructor: Ibrahim Tariq
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Quiz
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Quiz
• Q3Five 6 Kbps connections are multiplexed together. A unit is 1 bit Find
• a) The duration of 1 bit at input b) the duration of 1 bit output c) output bitrate d) output frame duration
• e) Output frame rate [8marks]
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Quiz
• Q4) Define 3 kinds of Transmission Impairments with example? [3 marks]
• Q 5) A channel bandwidth with 1 KHZ and Signal to Noise Ratio 3 db. Calculate Bit rate and Signal Levels required using Shannon capacity formula and Nyquist bit rate and?[4marks]
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4.6
Figure 4.4 Line coding schemes
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4.7
Figure 4.5 Unipolar NRZ scheme
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4.8
Figure 4.6 Polar NRZ-L and NRZ-I schemes
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4.9
In NRZ-L the level of the voltage determines the value of the bit.
In NRZ-I the inversion or the lack of inversion
determines the value of the bit.
Note
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4.10
NRZ-L and NRZ-I both have a DC component problem.
Note
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4.11
Figure 4.7 Polar RZ scheme
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4.12
Figure 4.8 Polar biphase: Manchester and differential Manchester schemes
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4.13
In Manchester and differential Manchester encoding, the transition
at the middle of the bit is used for synchronization.
Note
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4.14
The minimum bandwidth of Manchester and differential Manchester is 2 times
that of NRZ.
Note
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4.15
In bipolar encoding, we use three levels: positive, zero, and negative.
Note
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4.16
Figure 4.9 Bipolar schemes: AMI and pseudoternary
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4.17
In mBnL schemes, a pattern of m data elements is encoded as a pattern of n
signal elements in which 2m ≤ Ln.
Note
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4.18
Table 4.1 Summary of line coding schemes