EC2311 Communication Engineering Anna University Previous Year Question Paper May/June 2012 for EEE dpt (5th Semester) ...
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EC2311 Communication Engineering Anna University Previous Year Question Paper May/June 2012 for EEE dpt (5th Semester) ...
ELECTRICAL
AND ELECTRONICS
ENGINEERING
Fifth Semester
EC-2311 – COMMUNICATION ENGINEERING
Time: Three hours
Maximum: 100 marks
Answer ALL questions.
PART A — (10 × 2 = 20
marks)
PART-A
1. Define
Modulation index
2. State Carson’s
rule
3. What is
aliasing?
4. What is slope
overload error?
5. Define
entropy
6. Draw the NRZ
and RZ waveform for the pulse stream 10101011
7. What is multiplexing?
8. What are the
advantages of SDMA?
9. What is
geosynchronous orbit?
10. State
Snell’s law.
PART-B— (5× 16= 80 marks)
11.(a). (i)
Derive an expression for the AM wave and its power relation.(8)
(ii) what are
the advantages of SSB modulation technique? Explain any one method of SSB
generation (8)
(or)
b.(i) derive an
expression for the narrow band FM wave.(8)
(ii) Explain the
Armstrong method of FM generation.(8)
12.a.(i) state
and prove sampling theorem(6)
(ii)Explain the
generation of PWM and PPM waves.(10)
(or)
b.(i) compare
PCM and DM.(4)
(ii) Explain the
DM and ADM (6)
(iii) Explain
the concept of BPSK and QPSK technique in data communication.(6)
(or)
13. a. (i) with
suitable examples, explain Shannon Fano encoding Schemes (8)
(ii) Explain
Huffman coding with suitable example.(8)
(Or)
14. (a) Discuss
in detail about TDMA and FDMA techniques.(16)
(or)
(b) Discuss in detail about CDMA
technique and compare its performance with TDMA and FDMA (16)
15. (a) (i)
Explain the satellite link budget satellite system power budget.(8)
(ii) Explain the uplink and down link model of
satellite communication system.(8)
(or)
15. (b) (i) with
neat sketch explain the various blocks and its functionalities of a fiber optic
communication system.(8)
(ii) write a note on power line carrier
communications. (8)
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