Dr.A.P.J.Abdul Kalam University BE Electronics and Communication Advanced Communication System [EC802] Aug-Sep 2020 Question Paper

Dr.A.P.J.Abdul Kalam University Old Question Papers

Bachelor of Engineering

Eighth Semester Main Examination, Aug-Sep 2020

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) Write various properties of maximal-length-sequences.

(b) Describe time hoping impulse ratio.

Q.2 (a) Describe the architecture of the cognitive transceiver.

(b) Describe code division multiple access.

Q.3 (a) How time frequency selective channel is estimation is done in OFDM system?

(b) Discuss the issues in the spectrum management.

Q.4 (a) Describe multi carrier code division multiple access in detail.

(b) What is single carrier modulation with frequency domain equalization?

Q.5 (a) Describe smart antenna system with the help of transmitter and receiver.

(b) Describe MIMO in details.

Q.6 (a) Write Advantage and disadvantage of smart antenna with justification.

(b) Write short note on network coding and adaptive modulation.

Q.7 (a) What are fundamentals of relaying? Discuss relaying with multiple parallel relays.

(b) Discuss about routine and resource allocation in collaborative networks.

Q.8 Write short notes on -

 a) Inter carrier interference

 b) Spatial division multiple access

 c) OFDM

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