Anna University,
Chennai Nov/Dec 2012 Examinations
Rejinpaul.com
Important Questions
EC2312 - COMMUNICATION
ENGINEERING
V Sem EEE
Unit I-V
1.
Draw
the block diagram of low level AM transmitter and explain
2.
Derive an expression for amplitude modulated
wave and its power relations. Also give time and frequency domain
representation
3.
Explain
super heterodyne receiver with suitable block diagram
4.
Describe the operation of frequency division
multiplexing
5.
Explain the principle of indirect method of
frequency modulation With neat sketch
6.
Describe pulse code modulation scheme and draw
the wave forms
7.
Explain the working of QAM modulator and
detector with the signal constellation diagram
8.
Draw the block diagram of BPSK transmitter and
receiver. Explain the same digital modulation scheme with appropriate constellation diagram
9.
Draw
the block diagram of a TDM system and explain where TDM is applied
10.Explain delta modulation with suitable wave forms and list its
advantages and disadvantages
11.
How do you generate PPM from PDM?
12. Explain the working of FSK modulator and detector with the signal
constellation diagram
13.
Explain
the generation and demodulation of PWM wave.
14.Five source messages
are probable to appear as m1=0.4, m2=0.15, m3=0.15, m4=0.15, m5=0.15 . Find the
coding efficiency for 1. Shannon Fano coding, 2. Huffmann Coding
15.
Explain
Frequency Hop Spread spectrum and the two types in detail
16.Draw the block
diagram of a TDM system and explain where is TDM applied
17.
Explain
CDMA. Compare FDMA, TDMA and CDMA
18 What are the essential components required for establishing an optical link.What are the various losses associated with it?
19 What
are the benefits of satellite communication? How is the position of satellite
tracked from the earth station? Derive the satellite link equations and comment
on it
20 Explain the principle of operation of light sources and detectors.
