Dr. A.P.J. Abdul Kalam University BE VIII SEM (EC) Advanced Communication System [EC802] June 2021 Question Paper

Dr. A.P.J. Abdul Kalam University

Bachelor of Engineering

Eighth Semester Main Examination, June-2021

Advanced Communication System [EC802]

Branch-EC

Time: 3:00 Hrs Max Marks 70

Note: i) Attempt any five questions out of eight.

ii) Answer should be precise & to be point only.

iii) Assume suitable data if necessary & state them clearly.

iv) All questions carry equal marks.

Q.1 a) Explain the principle of single carrier modulation with frequency-domain equalization.

 b) Discuss the basic principle working of Direct Sequence Spread Spectrum.

Q.2 a) Describe the principle of OFDM and give implementation of transceivers.

 b) Explain about implementation of transceivers.

Q.3 a) How spectrum sensing and spectrum sharing is done in cognitive radio? Explain in detail.

 b) Discuss about spectrum sensing and Spectrum Management.

Q.4 a) Discuss the principle working of multiuser detection system.

 b) Explain the generation and characteristics of PN sequence

Q.5 a) What is CDMA? Explain. How does it employ spread spectrum techniques during the multiple access of the signals.

 b) Describe smart antenna system with the help of transmitter and receiver.

Q.6 a) Discuss the principle working of frequency hopping spread spectrum technique.

b) Discuss the principle working of smart antennas.

Q.7 a) What is spatial division multiple access? Explain.

 b) What are the benefits of co-operative transmission?

Q.8 Write Short Notes on

 a) Adaptive modulation

b) Time hoping impulse radio

c) Network Coding

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