Principles of Communication System

Course  Code 18EC53

Syllabus

                                                   Module-1

AMPLITUDE MODULATION: Introduction, Amplitude Modulation: Time & Frequency Domain description, Switching modulator, Envelop detector. (3.1 – 3.2 in Text) DOUBLE SIDE BAND-SUPPRESSED CARRIER MODULATION: Time and Frequency Domain description, Ring modulator, Coherent detection, Costas Receiver, Quadrature Carrier Multiplexing. (3.3 – 3.4 in Text)SINGLE SIDE–BAND AND VESTIGIAL SIDEBAND METHODS OF MODULATION: SSB Modulation, VSB Modulation, Frequency Translation, Frequency- Division Multiplexing, Theme Example:  VSB Transmission of Analog and Digital Television. (3.5 – 3.8 in Text)

 Module-2

ANGLE MODULATION: Basic definitions, Frequency Modulation: Narrow Band FM, Wide Band FM, Transmission bandwidth of FM Signals, Generation of FM Signals, Demodulation of FM Signals, FM Stereo Multiplexing, Phase–Locked Loop: Nonlinear model of PLL, Linear model of PLL, Nonlinear Effects in FM Systems. The Superheterodyne Receiver (4.1 – 4.6 of Text)

 Module-3

[Review of Mean, Correlation and Covariance functions of Random Processes.

(No questions to be set on these topics)] NOISE - Shot Noise, Thermal noise, White Noise, Noise Equivalent Bandwidth (5.10 in Text) NOISE IN ANALOG MODULATION: Introduction, Receiver Model, Noise in DSB-SC receivers. Noise in AM receivers, Threshold effect, Noise in FM receivers, Capture effect, FM threshold effect, FM threshold reduction, Pre-emphasis and De-emphasis in FM (6.1 – 6.6 in Text)

 Module-4

SAMPLING AND QUANTIZATION: Introduction, Why Digitize Analog Sources?, The Low pass Sampling process, Pulse Amplitude Modulation, Time Division Multiplexing, Pulse-Position Modulation, Generation of PPM Waves, Detection of PPM Waves.(7.1 – 7.7 in Text)

 Module-5

SAMPLING AND QUANTIZATION (Contd):

The Quantization Random Process, Quantization Noise, Pulse–Code Modulation: Sampling, Quantization, Encoding, Regeneration, Decoding, Filtering, Multiplexing; Delta Modulation (7.8 – 7.10 in Text),

Application examples - (a) Video + MPEG (7.11 in Text) and (b) Vocoders(refer Section 6.8 of Reference Book 1).

Text Book:

“Communication Systems”, Simon Haykins & Moher, 5th Edition, John Willey, India Pvt. Ltd, 2010, ISBN 978 – 81 – 265 – 2151 – 7.

MODULE 1

MODULE 2

MODULE 3

MODULE 4

MODULE 5