Thapar University 2007 B.E DIGITAL - Question Paper
THAPAR UNIVERSITY PATIALA
DEPARTMENT OF EELCTRONICS AND COMMUNICATION
Course Code: EC-028 / Course' Name: Digital Communication Systems / Instructor: Dr. Amit Kumar Kohii
I THAPAR UNIVERSITY, PATIALA - 147004, PUNJAB, INDIA DEPARTMENT OF ELECTRONICS AND COMMUNICATION ENGINEERING
B.E. (THIRD YEAR)
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Attempt all Questions 'l ime: 1 hour; Total Marks: 12
Question 1: In a T1 digital communication system, inputs to the multiplexer are 2W. 2W. 4\V. 4\V, 6W. Anri 6W samples per second.
(a) What should be the minimum clock rate? (0.25)
(b) What is the sample rate at the output of multiplexer? (0.25)
(c) Design a system using multiplexers and demultiplexers to give the output data rate 24W. (1.50)
Question 2: Calculate the power spectral density of NRZ-polar format used for PCM digital transmission.
(2.00)
Question 3: What are different signaling formats for PCM transmission? (1.50)
Why Manchester format supersedes other formats? (0.50)
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Question 4: Write a short note on DPCM. |
(2.00) |
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Question 5: Calculate the companding gain using jii-lavv and A-la\v. |
(2.00) |
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Question 6: Differentiate between |
(2.00) |
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\ AWGN | |
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*. Quantization noise | |
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*. Granular noise | |
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*. Slope-overload error noise |
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Attachment: |
| Earning: Approval pending. |
