Analog Communication Systems

Teacher

Harish Chandra Mohanta

Category

Core Courses

Course Attendees

Still no participant

Course Reviews

Still no reviews

Course Name : Analog Communication Systems

Code(Credit) : CUTM1045 (2-1-0)

Course Objectives

  • Impart the basic concepts of analog modulation schemes.
  • Describe different types of noise and predict its effect on various analog communication systems.
  • Know the techniques of analog communication and noise analysis in analog communication.

Learning Outcomes

Upon successful completion of this course, students should be able to:

  • Analyze energy and power spectral density of the signal.
  • Develop an understanding of the performance of analog communication systems.
  • Calculate bandwidth and power requirements for analog systems.
  • Analyze the different characteristics of the receiver.

Course Syllabus

Module I (5 Hours)           

Basic block diagram of analog communication. Need for modulation, Fourier transforms, Properties of Fourier transform (Duality property, Frequency shifting property, Modulation property). Introduction to AM: Time-Domain description, Frequency – Domain description,

Generation of AM wave: square law modulator, switching modulator. Detection of AM waves: square law detector, envelop detector.

Practice: (using Hardware and MATLAB)

DSB+C Modulation using Trainer Kit and MATLAB

DSB+C Demodulation using Trainer Kit and MATLAB

Module II (6 Hours) 

Double sideband suppressed carrier modulation (DSBSC): Time-Domain description, Frequency-Domain representation, Generation of DSBSC waves: balanced modulator, ring modulator. Coherent detection of DSBSC modulated waves.

SINGLE SIDE-BAND MODULATION (SSB):

Quadrature carrier multiplexing, SSB modulation, Frequency-Domain description of SSB wave, Time-Domain description. Phase discrimination method for generating an SSB modulated wave, Demodulation of SSB waves.

Practice: (using Hardware and MATLAB)

Quadrature Carrier Multiplexing using Trainer Kit and  MATLAB.

DSB-SC Modulation and Demodulation using Trainer Kit and MATLAB.

VESTIGIAL SIDE-BAND MODULATION (VSB):

Frequency – Domain description, Generation of VSB modulated wave, Time – Domain description, Frequency division multiplexing, Superheterodyne receiver.

Practice: (using Hardware and MATLAB)

Frequency Division Multiplexing using Trainer Kit and MATLAB.

Module III (5 Hours)

ANGLE MODULATION (FM):

Basic definitions, FM, narrowband FM, wideband FM, the transmission bandwidth of FM waves, Generation of FM waves: indirect FM, and direct FM.

Practice: (using Hardware and MATLAB)

FM Modulation using Trainer Kit and MATLAB

Module IV (4 Hours)           

DEMODULATION OF FREQUENCY MODULATED SIGNALS:

Demodulation of FM waves, Phase-locked loop, Non-linear model of the phase-locked loop, Linear model of the phase-locked loop, Nonlinear effects in FM systems. 

Practice: (using Hardware and MATLAB)

FM Demodulation using Trainer Kit and MATLAB.

FM Demodulation using PLL.

Module V (4 Hours)

RANDOM PROCESS:

Random variables, Statistical averages: Function of random variables, moments, mean, Correlation, and Covariance function: Principles of the autocorrelation function, cross-correlation functions, Central limit theorem, Properties of Gaussian process.

Practice: (Using MATLAB)

Study of Autocorrelation & Cross-correlation using MATLAB

Module VI (5 Hours)

NOISE: Introduction, shot noise, thermal noise, white noise, Noise equivalent bandwidth, Narrow bandwidth, Noise Figure,  Frequency Domain Representation of Noise, Power Spectral Density, Spectral Components of Noise, Response of a Narrowband filter to noise, Effect of a Filter on the Power spectral density of noise, Superposition of Noises, Noise Bandwidth, Narrowband representation of noise and its PSD.

Practice: (using MATLAB)

Generation of Gaussian Noise using MATLAB

Module VII (3 Hours)

NOISE IN CONTINUOUS WAVE MODULATION SYSTEMS:

Introduction, Receiver model, Noise in DSB-SC receivers, Noise in SSB receivers, Noise in AM receivers, Threshold effect, Noise in FM receivers, FM threshold effect, Pre-emphasis and De-emphasis in FM.

Reference

Text Books:

  1. Communication Systems, Simon Haykins, 5th Edition, John Willey, India Pvt. Ltd, 2009.
  2. Taub, D. L Schilling, G. Saha, Principles of Communication System, 3rd Edition, 2008, Tata McGraw Hill, India; ISBN: 0070648115. (Selected portions from chapters: 1, 2, 3, 4, 5, 7, 8 and 9).

Reference Books:

  1. Modern Digital and Analog communication systems B. P. Lathi, Oxford University Press., 4th ed, 2010.
  2. Communication System Engineering, Second Edition by MasoudSalehi, John G. Proakis, ISBN: 0130950076.
  3. Principles of Electronic communication Systems, Louis E. Frenzel,3rd Edition, Tata McGraw Hill.
  4. Communication Systems: Analog and digital, Singh and Sapre, TMH, 2nd Ed, 2007.

Session Plan

Session 1

Basic block diagram of analog communication, information source, source transducer, transmitter, channel, receiver. Need for modulation.

https://www.youtube.com/watch?v=KT3yNuY_FPM&feature=youtu.be

https://www.youtube.com/watch?v=CRXxm8N7oKU

ACS_ Communication System Block Diagram

Session 2

Fourier Transforms properties: duality property, frequency shifting property, modulation property.

https://www.youtube.com/watch?v=MSVazG341T8

https://www.youtube.com/watch?v=SpzNQOOBeRg

ACS_Fourier Transform and its Properties

Session 4

Generation of AM wave: Square Law Modulator, Switching Modulator.

https://www.youtube.com/watch?v=D65KXwfDs3s

ACS_Generation of AM Signals

Lab Practice

AM(DSB+C) Modulation using MATLAB and Trainer Kit

http://vlab.amrita.edu/index.php?sub=59&brch=163&sim=260&cnt=2644

Session 5

Detection of AM waves: square law detector, envelop detector.

Study of DSB+C demodulation using Envelope Detector using trainer kit.

https://www.youtube.com/watch?v=e_gTCU2fnD8&feature=youtu.be

http://vlab.amrita.edu/index.php?sub=59&brch=163&sim=259&cnt=358

ACS_ Demodulation Circuit

Session 6

Double sideband suppressed carrier modulation (DSBSC): Time-Domain description, Frequency-Domain representation.

https://www.youtube.com/watch?v=6028j9VLlXA&feature=youtu.be

ACS_ DSBSC

Lab Practice

To Study Generation of DSB-SC signal using trainer kit and MATLAB.

Session 8

Coherent detection of DSBSC modulated waves.

https://www.youtube.com/watch?v=QKle2j4CaNM&feature=youtu.be

ACS_ Demodulation Circuit

ACS_ COSTAS LOOP

Lab Practice

Study of coherent detection of DSB-SC  using trainer kit.

Session 9

Quadrature carrier Multiplexing.

https://www.youtube.com/watch?v=zy4DlBYjnFM&list=PLb2wGSuEdRG8lKGO4q7NXE6QDWISAsBkZ&index=34

ACS_ Quadrature Amplitude Modulation

Using MATLAB to study the Quadrature Schemes.

Session 10

Single side-band modulation, Frequency-Domain description of SSB wave, Time-Domain description.

Lab Practice

Generation of SSB using trainer kit and MATLAB.

https://www.youtube.com/watch?v=yv11bJN0Y3w&list=PLb2wGSuEdRG8lKGO4q7NXE6QDWISAsBkZ&index=28

Session 11

Phase discrimination method for generating an SSB modulated wave & Demodulation of SSB waves.

https://www.youtube.com/watch?v=yv11bJN0Y3w&list=PLb2wGSuEdRG8lKGO4q7NXE6QDWISAsBkZ&index=28

Session 12

Frequency – Domain description, Generation of VSB modulated wave, Time – Domain description, Superheterodyne Receiver

https://www.youtube.com/watch?v=P8imJHrg8mQ

Session 13

Frequency Division Multiplexing(FDM).

https://www.youtube.com/watch?v=DXmZpMizzvo&list=PLXnsjPD8-xuvuHKopadw0omnXZXKFTXkx&index=4

Lab Practice

Simulink model design and study of FDM using MATLAB.

Session 15

Narrowband FM, Wideband FM, The transmission bandwidth of FM waves.

https://www.youtube.com/watch?v=ZyiHw6z2weY

https://www.youtube.com/watch?v=KhswKmSy7k8

ACS_Frequency Modulation

Session 16

Direct Method of FM Generation.

https://www.youtube.com/watch?v=qHd5eLD01zo

Lab Practice

Generation of FM Signal using trainer kit and MATLAB.

Session 17

Indirect Method of FM Generation (Armstrong Method)

https://www.youtube.com/watch?v=hhto6WRgl1g

Session 19

A nonlinear model of the phase-locked loop, Linear model of the phase-locked loop, Nonlinear effects in FM systems.

https://www.youtube.com/watch?v=jE3cGH2iSK0

Session 20

Lab Practice

FM Demodulation using Trainer Kit and MATLAB.

http://vlab.amrita.edu/index.php?sub=59&brch=163&sim=261&cnt=474

Session 21

Lab Practice

Study of FM demodulation using PLL

Session 22

Mathematical Definition of Random Process, Stationary Process.

https://www.youtube.com/watch?v=Y2bab0U3Ji8

Session 23

Random variables: Several random variables.

https://www.youtube.com/watch?v=3v9w79NhsfI

random Variable

Session 24

Statistical averages: Function of Random variables, moments, Mean, Mean Square value, Variance, Standard deviation.

https://www.youtube.com/watch?v=DblXnXxUQc0&list=PLqbmqXmlagen6h-1MUF-gkhKIi-QEuHiu

Session 25

Correlation and Covariance function: Principles of the autocorrelation function, cross-correlation functions. Central limit theorem.

https://www.youtube.com/watch?v=JyZc2JXEn5g

Lab Practice

Study of autocorrelation and cross-correlation using MATLAB.

Session 26

Introduction, shot noise, thermal noise, white noise, Noise equivalent bandwidth, Narrow bandwidth.

https://www.youtube.com/watch?v=CCA6KbytXBc

ACS_ Noise

Session 27

Noise Figure.

 

Lab Practice

Study of Gaussian noise using MATLAB.

Session 28

Frequency Domain Representation of Noise, Power Spectral Density, Spectral Components of Noise.

https://www.youtube.com/watch?v=3BGktNh7aoA

Session 29

The response of a narrowband filter to noise, the effect of a filter on the power spectral density of noise.

https://www.youtube.com/watch?v=3BGktNh7aoA&t=319s

Session 30

Superposition of noises, Noise Bandwidth, Narrowband representation of noise, and its PSD.

https://www.youtube.com/watch?v=U45SZani9ro

Session 31

Introduction of receiver model. The figure of merit (FOM) of a receiver.

https://www.youtube.com/watch?v=3QIaZrK_v7s

Figure merit of SSB receiver Derivation

Session 32

Noise in DSB-SC receivers. Noise in SSB receivers.

https://www.youtube.com/watch?v=CsrtlAsl_Uc

https://www.youtube.com/watch?v=hWhkHcMV0So

Session 33

Noise in AM receivers, Threshold effect. Pre-emphasis and De-emphasis in FM.

https://www.youtube.com/watch?v=5xq2M1HjIhQ

Our Main Teachers

Harish Chandra Mohanta

Assistant Professor, ECE Department, Bhubaneswar Campus, CUTM
VIEW PROFILE

  I received my M. Tech degree in 2015 from IIT, Kharagpur. Now, I am working as an Asst. Professor in ECE Department, SoET, Bhubaneswar campus, CUTM.   Research Interests: Wireless Energy Harvesting System. Metamaterial Study. Printed Microstrip Antenna Design. Transceiver System Design. Biomedical Instrumentation. Ongoing Project:  Design and Development of a Cost-Effective Indigenous Insulin […]