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SHEET 5
1. Define a Line Coding and list five-line coding schemes.
2. List briefly and define important factors that can be used in evaluating or comparing the
various digital-to-digital encoding techniques.
3. Distinguish between a signal element and a data element
4. Distinguish between data rate and signal rate.
5. Define a DC component and its effect on digital transmission.
6. Define the characteristics of a self-synchronizing signal.
7. What is differential encoding?
8. Define scrambling and give its purpose in the context of digital-to-digital encoding
techniques.
9. Convert the following digital data stream 11001001 to digital signal using:
a) Unipolar
b) Polar NRZ-L “Non return to zero level”
c) Polar NRZ-I “Non return to zero inversion”
d) RZ “Return to Zero”
e) Manchester
f) Differential Manchester
g) Bipolar AMI “Alternate Mark Inversion”
h) Bipolar Pseudoternary
10. Assuming a bit stream of ten 1s, sketch the waveforms for this stream using the codes of:
a) Unipolar
b) NRZ-L
c) NRZ-I
d) RZ
e) Manchester
f) Bipolar AMI
11. Draw the following bit pattern (1100000000100001001) by using the following line coding
schemes:
a) Bipolar AMI
b) HDB3 “high-density bipolar-3 zeros”
c) B8ZS “bipolar with 8-zeros substitution”
COLLEGE OF ENGINEERING & TECHNOLOGY
Department
Lecturer
Assoc. Teacher
Course Title
Course Code
Date
: Computer Engineering
: Prof. Dr. Yahya Z. Mohasseb & Dr. Hussien El Attar
: Eng. Ahmed Zakaria
: Data & Computer Communication
: CC331
: Spring 2022
