DE12 COMMUNICATION ENGINEERING
1. Introduction
to Communication Engineering
2 hours
1.1
Information
Signals.
1.2
Elements
of a Communication System.
1.3
Need
for Modulation.
1.4
Transmitters
and Receivers.
1.5
Channel
Noise.
1.6
Bandwidth
of Information Signals.
I [1]
2.
Noise 3
hours
2.1
Classification
of noise (internal and external).
2.2
Sources
of noise, Description of thermal noise and shot noise.
2.3
Noise
calculations.
2.4
Noise
Temperature and Noise Figure; Signal-to-noise ratio.
I [2]
3.
Amplitude Modulation 10
hours
3.1 Amplitude
modulation (AM).
(sinusoidal
carrier with a sinusoidal modulating signal)
3.2
AM
Signal waveforms.
3.3
Depth
of modulation.
3.4
Power
relations.
3.5
Spectrum.
3.6
AM
demodulation techniques; Average and peak envelope detectors, Simple circuits
for generation and detection of AM signals.
3.7
Block
diagrams of AM Transmitters and Receivers.
3.8
Double
sideband (DSB-SC) and Single sideband (SSB) signals.
3.9
Advantages
and disadvantages.
3.10
Typical
applications.
3.11
Frequency
division multiplexing (FDM).
3.12
Generation
and detection schemes of DSB-SC and SSB
signals.
I [3, 6]
4.
Frequency and Phase Modulation 7 hours
4.1 Frequency
and phase modulation (FM, PM).
(sinusoidal
carrier with a sinusoidal modulating signal)
4.2
Waveforms.
4.3
Idea
of spectrum and bandwidth.
4.4
Power.
4.5
Synchronous:
FM demodulation techniques: Slope detector (Basic principles), Ratio detector
(Basic principles): Block diagrams of simple modulators and demodulators.
4.6
Noise
considerations.
4.7
Pre-emphasis
and De-emphasis.
4.8
Advantages
of FM.
4.9
Stereophonic
FM broadcasting.
I [5, 6]
5.
Pulse Modulation 7
hours
5.1
Statement
of sampling theorem for low pass signals.
5.2
Natural
and Flat top sampling.
5.3
Reconstruction
of signals from samples.
5.4
Pulse
amplitude (PAM).
5.5
Pulse
width (PWM).
5.6
Pulse
position (PPM) modulation.
5.7
Pulse
code modulation (PCM).
5.8
Time
division multiplexing (TDM).
5.9
Introduction
to telegraphy and telemetry.
I [13]
6. Phase – locked loop 3hours
6.1
Introduction
to PLL.
6.2
Linear
models of PLL.
6.3
Phase
detectors; VCO’s and loop filters.
6.4
Digital
PLL’s.
6.5
PLL
applications.
6.6
FM
demodulation using PLL (Basic principles).
II [10.7]
7. Transmission Lines, Waveguides and
Fiber Optics 10
hours
7.1
Primary
and Secondary constants of a transmission line.
7.2
Input
impedance.
7.3
Lossless
lines.
7.3.1 Applications of lossless lines as high frequency
reactive and matching elements.
7.4
Rectangular
and circular waveguides.
7.5
Modes
of transmission, dominant modes.
7.6
Methods
of coupling.
7.7
Cavity
resonators.
7.8
Introduction
to optical communications.
7.9
Optical
fibers.
7.10
Light
transmission in a fiber - Dispersion phenomena
7.11
Losses
in a fiber – Dispersion phenomena.
7.12
Optical
sources and detectors.
I [7]
8.
Antenna and Wave Propagation 8 hours
8.1
Electromagnetic
Radiation.
8.2
Propagation
of waves:
8.2.1 Ground waves.
8.2.2 Sky wave propagation.
8.2.3 Space waves.
8.2.4 Tropospheric scatter propagation.
8.3
Extraterrestrial
Communications.
8.4
Radiation
mechanism.
8.5
Elementary
doublet.
8.6
Wire
radiators in space.
8.6.1 Current
and voltage distributions.
8.6.2 Resonant
and non-resonant antennas.
8.7
Antenna
gain, resistance, polarization, beam width and bandwidth.
8.8
Dipole
arrays.
8.9
Folded
dipole.
8.10
Rhombic
antenna.
8.11
Loop
antenna.
8.12
Horn
antenna.
8.13
Parabolic
dish and their applications.
I [8, 9]
9.
Digital Communication, Television & Satellite
Communication 10 hours
9.1
Digital
Communication
9.1.1
Fundamentals
of digital data transmission.
9.1.2
Digital
modulated signals.
9.1.3
Simple
techniques of error detection and correction.
9.2 Television
9.2.1
Basic
principles of television: scanning.
9.2.2
Idea
of bandwidth.
9.2.3
Blanking
and synchronizing pulses.
9.2.4
Modulation
scheme.
9.2.5
Monochrome
system.
9.2.6
Extension
to colour transmission.
9.2.7
Block diagrams of Transmitters and Receivers.
9.3 Satellite Communication
9.3.1 Introduction to satellite communication, advantages.
9.3.2 Geo-stationary
satellite orbit, coverage, applications.
I [14, 15, 17]
Text Book
I. Kennedy: Electronic Communication Systems; Tata-McGraw Hill;
3rd Edition, 1985.
II. Taub & Schilling: Principles of Communication Systems; McGraw Hill
International; 2nd Edition, 1986.
Reference
Book
1. Roddy & Coolen: Electronic Communications; Prentice Hall
of India, 4th Edition, 1995.