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Posted Date: 13 May 2008 Posted By: palaniappan Member Level: Silver
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2008 Anna University B.E Computer Science Analog and digital communication - Unit - V question bank Question paper
UNIT V – SPREAD SPECTRUM AND MULTIPLE ACCESS TECHNIQUES
PART –A
1. Define spread spectrum
2. What is the need for spread spectrum
3. What are the two types of spread spectrum modulation
4. Define PN sequence.
5. List and define the properties of PN sequence.
6. define direct sequence spread spectrum
7. Define Frequency hopping spread spectrum
8. Define Fast and Slow frequency hopping
9. What is a jammer?
10. Define Processing gain
11. What is spread factor
12. Define multiple access
13. What is the difference between Multiple access and multiplexing
14. Define TDMA and FDMA
15. Define CDMA and SDMA
16. What is cellular radio
17. Define Frequency hand off
18. Define multi path propagation
19. Define Doppler shift
20. Define GSM and IS-95
21. Draw the frame structure of GSM
22. Draw the block diagram of RAKE receiver
23. What is source coding of speech? List the types of Predictive coding
PART –B
1. Define Pseudo noise sequence? How do you generate PN sequence?
2. Draw the block diagram of a simple PN sequence generator using shift register and obtain the output sequence. For this output sequence ,verify the properties of the PN sequence
3. Describe Direct sequence spread spectrum with coherent BPSK
4. Derive Processing gain for spread spectrum system
5. Describe Slow and Fast Frequency Hopping
6. Write short notes on Multiple access techniques
7. Compare the merits and demerits of TDMA and FDMA multiple access schemes
8. Explain GSM and IS -95 wireless communication systems
9. Draw the block diagram of RAKE receiver and explain the operation
10. Explain the working of Multi pulse excited Predictive Coding with suitable diagrams
11. Explain the working of Code excited Predictive coding with suitable diagrams
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