B.TECH DEGREE EXAMINATION,MAY 2014 Fourth Semester
Branch : Computer Science and Engineering
CS 010 404-SIGNALS AND COMMUNICATION SYSTEMS (CS)
(New Scheme-2010 Admission onwards) [Regular/Improvement/Supplementary]
Time : Three Hours
Maximum:100 Marks
Part A
Answer all questions.
Each question carries 3 marks.
2. Define and explain Noise. List the types of noise
3. What is the difference between PPM and PDM ? Explain in detail.
4. What is the principle of WDM ? Mention the types of WDM.
5. Explain the properties of hamming codes.
(5*3=15 marks)
Part B
Answer all questions.
Each question carries 5 marks.
7. Differentiate Twisted pair from coaxial cables. Explain.
8. What is OOK ? Bring out its mathematical representation .
9. Explain the principles of Half and Full duplex transmissions with neat diagrams.
10. Give an account on "Baudot code".
(5*5=25 marks)
Part C
Answer all questions.
Each full question carries 12 marks.
11. (i) State and explain sampling theorem.
(ii) Prove the properties of CTFS.
Or
12. Differentiate continuous time signals from discrete time signals with examples. Explain the difference.13. Define and explain typical parameters of communication systems.
Or
14. State and explain Shannon Hartley theorem. Derive an expression for Channel capacity of a Noisy channel.15. Explain AM,PM and FM in detail with neat diagrams. Bring out their mathematical representations.
Or
16. Compare and contrast the parameters of different modulation formats. Explain the comparison in detail.17. Explain the principles of TDM and FDM in detail with neat diagrams .
Or
18. Explain the basic concept of SONET with neat diagrams.19. Explain the properties and advantages of Linear block codes. Drive its code vector.
Or
20. Write technical notes on:(i) EBCDIC
(ii) Parity coding
(iii) Syndrome calculator.
(5*12=60 marks)
