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Part A 10 2 20: Course In-Charge Ahod HOD Principal

This document outlines an internal exam for a Digital Communication course, including 20 short answer questions worth 2 marks each (Part A), 5 longer answer questions worth 13 marks each (Part B), and 1 problem worth 15 marks requiring the construction of matrices and determining error correcting capacity (Part C). The exam covers topics such as signaling techniques, intersymbol interference, line codes, eye patterns, error control coding, and linear block codes. The total marks for the exam are 100 over a duration of 3 hours.

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84 views1 page

Part A 10 2 20: Course In-Charge Ahod HOD Principal

This document outlines an internal exam for a Digital Communication course, including 20 short answer questions worth 2 marks each (Part A), 5 longer answer questions worth 13 marks each (Part B), and 1 problem worth 15 marks requiring the construction of matrices and determining error correcting capacity (Part C). The exam covers topics such as signaling techniques, intersymbol interference, line codes, eye patterns, error control coding, and linear block codes. The total marks for the exam are 100 over a duration of 3 hours.

Uploaded by

Bala913
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
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VICKRAM COLLEGE OF ENGINEERING, ENATHI

DEPARTMENT OF ELECTRICAL AND ELECTRONICS ENGINEERING


INTERNAL EXAM- II
E6501 DIGITAL COMMUNICATION

YEAR/ SEMESTER : II/III TOTAL MARKS : 100


DATE : 21.08.2017 DURATION : 3Hrs

PART A 10*2=20
1. What is meant by pseudo ternary signaling? BT 1, CO 3
2. Draw the NRZ and RZ code for the digital data 10110001. BT 3, CO 3
3. What is an ISI in baseband binary system? BT 2, CO 3
4. State any four properties of a line code. BT 2, CO 3
5. What are Eye pattern? What is the purpose of using an eye pattern? BT 1, CO 3
6. ISI cannot be avoided. Justify the statement. BT 4, CO 3
7. State channel coding theorem. BT 1, CO 5
8. Define code rate of a block code. BT 3, CO 5
9. What is the need for Error control codes? BT 2, CO 5
10. List the properties of cyclic codes. BT 1, CO 5

PART B 5*13=65
11. (a) Describe the baseband transmission system with a neat block diagram.(8) BT 1, CO 3
(b) Explain ISI effect with neat diagram. How it is avoided? (5) BT 2, CO 3

12. (a) Explain any one method of ISI control. (8) BT 2, CO 3


(b) Define Ideal Nyquist Channel. (5) BT 3, CO 3

13. (a) Describe modified duo binary coding technique and its performance by illustrating it with
suitable example. (10) BT 2, CO 3
(b) Define Precoder. (3) BT 2, CO 3

14. (a) What is eye pattern? Explain the measurement of different parameters using eye pattern. (8)
(b) Define Tapped Delay line filter. (5) BT 1, CO 3

15. (a) Define Error Control coding with its type. (5) BT 1, CO 5
(b) Explain the matrix description of LBC. (8) BT 2, CO 5

PART C 1*15=65
16. For a systematic linear block code, the three parity check digits P1,P2,P3 are given by

Pk,n-k =

(i) Construct generator matrix and parity matrix


(ii) Construct code generator with minimum distance.
(iii) Determine error correcting capacity. BT 2, CO 5

Course In-Charge AHOD HOD Principal

Note:BT1-Remember,BT2-Understand,BT3-Apply,BT4-Analysis,BT5-Evaluate,BT6-Create

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