B.E-B.E Electronics and Communication Engineering Principles of Communication Theory (Sathyabama University, Chennai, Tamil Nadu-2011)
Monday, 19 August 2013 07:48Duraimani
(Established under section 3 of UGC Act,1956)
Course & Branch :B.E - P-ECE Max. Marks:80
Title of the Paper :Principles of Communication Theory
Sub. Code :SECX1027 (2010) Time : 3 Hours
Date :09/11/2011 Session :AN
PART - A (10 x 2 = 20)
Answer ALL the Questions
1. List out the need for modulation.
2. Define the term modulation index.
3. Sketch the relationship between FM and PM.
4. State the differences between narrowband and wideband FM.
5. Write the expression for zero ISI.
6. List out noises occurring in delta modulation.
7. What is meant by cell splitting?
8. Name the orbits of satellite system.
9. Define the term entropy.
10. What is meant by channel capacity?
PART – B (5 x 12 = 60)
Answer All the Questions
11. With neat diagram explain the working principle of DSB SC system.
(or)
12. Draw and explain the super heterodyne receiver.
13. Discuss in detail about wide band FM.
(or)
14. Write short note on direct method of generation and detection of FM signal.
15. With neat diagram, explain the working principle of PCM system.
(or)
16. What is meant by PSK? Explain the generation and detection of PSK.
17. Write short notes on Single mode fiber and graded index fiber.
(or)
18. With neat diagram explain in detail about CDMA system.
19. Apply Shannon Fano encoding procedure for the following message p={0.49, 0.14,0.14,0.07,0.07,0.04,0.02,0.02,0.01}. Calculate the codeword and average codeword length.
(or)
20. A discrete memory less source and their probability are 0.4, 0.2, 0.2, 0.1, 0.1.
Find the code word of the Huffman code and average codeword length.
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