Sathyabama University 2008 B.E Computer Science and Engineering Principles of Communication Engineering - Question Paper

SATHYABAMA UNIVERSITY

(Established under section 3 of UGC Act, 1956)

 

Course & Branch: B.E - CSE (Part Time)

Title of the paper: Principles of Communication Engineering

Semester: I Max. Marks: 80

Sub.Code: 611PT102 (2006) Time: 3 Hours

 

PART A (10 x 2 = 20)

Answer All the Questions

1. Define modulation index.

2. If the carrier of a 100 percent modulated AM wave is suppressed, what will be the percentage of power saved?

 

3. What is the bandwidth of an Fm signal?

4. Draw the Block diagram of a FM receiver.

 

5. Define sampling theorem.

 

6. What is quardrature multiplexing?

 

7. How the performance of modulation systems are determined.

 

8. What do you mean by Digital modulation?

 

9. Define Entropy.

 

10. What is convolution code?

 

 

 

PART B (5 x 12 = 60)

Answer All the Questions

11. Explain balanced modulator.

(or)

12. With block diagram explain Superhetrodyne receiver.

 

13. Describe Angle modulation and its mathematical representation.

(or)

14. Explain Foster seeley discriminator.

 

15. Explain the encoding procedure of PPM and PWM.

(or)

16. Enumerate FDM.

 

17. Explain M-Array modulation.

(or)

18. With diagram explain QPSK.

 

19. Explain error control coding with example.

(or)

20. Describe Frequency hopping spread spectrum.