B.E-B.E Electronics and Tele-Communication Engineering Spread Spectrum Techniques (Sathyabama University, Chennai, Tamil Nadu-2010)
Friday, 23 August 2013 03:02Duraimani
(Established under section 3 of UGC Act,1956)
Course & Branch :B.E - ETCE
Title of the Paper :Spread Spectrum Techniques Max. Marks :80
Sub. Code :525702/625702 Time : 3 Hours
Date :02/03/2010 Session :AN
PART - A (10 x 2 = 20)
Answer ALL the Questions
1. What are the classifications of spread spectrum?
2. What are the positive performance features of spread spectrum?
3. Write the classification of direct sequences spread spectrum?
4. Define jammers.
5. Write down the advantages of frequency hopped spread spectrum.
6. What is ‘chirp’?
7. What is acquisition?
8. Define tracking.
9. What are the applications of spread spectrum system in cellular communication?
10. Write the features of IS-95.
PART – B (5 x 12 = 60)
Answer All the Questions
11. Explain in detail about generation of PN – Codes.
(or)
12. Explain spread spectrum model for digital communication system.
13. Explain the modulation and demodulation of direct sequence spread spectrum.
(or)
14. Explain the performance of direct sequence spread spectrum in noise and hammer.
15. With neat block diagram, explain the frequency hopped spread spectrum system model.
(or)
16. (a) Compare fast frequency hopping and slow frequency hopping. (4)
(b) Explain the demodulation techniques used in frequency hopped spread spectrum. (8)
17. What are the considerations in jamming? Explain it in detail.
(or)
18. Write short notes on
(a) Acquisition
(b) Tracking
19. Explain the packet and frame format in IS 95.
(or)
20. Explain about CDMA and multipath channels.
| Earning: ₹ 3.05/- |
