May 2024
Intermediate to advanced
309 pages
13h 33m
English
Content preview from Data Communications and Computer Networks by Pearson
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Analog and Digital Transmission 49
18. Can the bit rate be less than the pulse rate? Why or why not?
Ans: Bit rate is always greater than or equal to the pulse rate because the relationship between pulse
rate and bit rate is defined by the following formula
Bit rate = pulse rate × log
2
L,
where L denotes the number of data levels of the signal and log
2
L denotes the number of bits per level.
If a pulse carries only 1 bit (that is, log
2
L=1), the pulse rate and the bit rate are the same. How-
ever, if the pulse carries more than 1 bit, then the bit rate is greater than the pulse rate.
19. Discuss various line coding schemes.
Ans: There
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