Electromagnetic Field Theory

Communication Systems I

GRAPHIC ERA (DEEMED TO BE UNIVERSITY), DEHRADUN

SEMESTER IV

Sr. No.

Department of Electronics and Communication Engineering

1.

Subject Code

TEC 401

Course Title

Communication Systems I

2.

Contact Hours

L

3

T

0

P

0

3.

Examination Duration

Theory

03

Practical

0

4.

Relative Weight

CIE

25

MSE

25

ESE

50

6.

Credit

03

6.

Semester

Four

7.

Category of Course

DSC/PCC

8.

Pre-requisite

Signals & Systems (TEC 304)

 

9.

Course Outcomes

After completion of the course the students will be able to:

CO1: Demonstrate and understand different methods of amplitude modulation and demodulation schemes, their design, operation and applications.

CO2: Demonstrate and understand different methods of angle modulation and demodulation schemes, their design, operation and applications.

CO 3: Understand the random variable, random process and their application for Noise analysis.

CO4: Demonstrate and understand different methods of pulse modulation, their design, operation and applications.

CO5: Evaluate the performance of analog communication system in the presence of noise.

CO6: Apply the concepts of Analog modulation and demodulation for radio & TV receivers

10. Details of the Course

Sl. No.

                      Contents

Contact Hours

1.

Unit 1: Amplitude Modulation Systems:

Modulation, Need of modulation, Model of communication system, Amplitude Modulation: Equation for AM wave, Modulation index, Power and current relationships, Transmission and power efficiency, Generation and demodulation of DSB-FC, DSB-SC, SSB-SC and VSB signals, Spectral characteristics of amplitude modulated signals, Comparison of amplitude modulation systems.                                                                                                                 

         10

 

2.

Unit 2: Angle Modulation Systems:

Phase and frequency modulation: Narrow band and wideband FM & PM, Spectral characteristics of angle modulated signals, Generation and demodulation of FM Signal, PLL.

11

3.

Unit 3: Noise:

Introduction – internal and external noise, Noise equivalent bandwidth, S/N ratio, Noise figure, Equivalent noise temperature, Equivalent Noise figure for Cascade connection of two port network. Equivalent noise temperature for Cascade connection of two port network.

8

4.

Unit 4: Pulse Analog Modulation System:

Sampling process, Pulse amplitude modulation, Pulse duration modulation, Pulse position modulation.

7

5.

Unit 5: SNR Performance of Continuous Wave Modulation Systems:

Introduction: Review of probability and random process. Gaussian and white noise characteristics, Analog communication model, SNR calculation in DSB-SC, SSB-SC, DSB-FC, FM & PM  systems, FM threshold effect; Pre-emphasis and De-emphasis in FM, Comparison of performances.

9

 

Total

45

11. Suggested Books

SL.

No.

Name of Authors/Books/Publishers

Edition

Year of Publication / Reprint

 

Textbooks

 

 

1.

B. P. Lathi, “Modern Digital and Analog Communication”, Oxford Publication.

3rd

2005

2.

Simon Haykin, “Communication Systems”, John Willey.

4th

2001

3.

Taub and Schilling, “Principles of Communication System”, Tata McGraw-Hill.

4th

1995

4.

HWEI HSU, “Analog and Digital Communications”, Schaum Outline Series.

2nd

2003

 

Reference Books

 

 

1.

Roddy and Coolen, “Electronic Communication”, Prentice Hall of India.

4th

1998

2.

Singh and Sapre, “Communication system”, TMH.

2nd

2007

3.

A. Papoulis, “Probability, Random variables and Stochastic processes”, MGH.

4th

2002



Microprocessor and its applications

Integrated Circuits and Applications

Week 1:  Integrated circuits basics, Operational Amplifiers: Introduction to ideal and practical Op. amps, Characteristics, Modes of operation
Week 2: Applications of Op. amp: Adder, Subtractor, Integrator, Differentiator, Instrumentation amplifier
Week 3: Problem Solving: Problems based on applications of Op. amp.
Week 4: Active filters: Lowpass, Highpass, Bandpass and Band reject filters
Week 5: Sinewave Oscillators: RC phase shift, Wien bridge Oscillators
Week 6: Non-linear applications of Op. amp: Comparators, Zero crossing detectors and Schmitt trigger, waveform generator
Week 7: 555 Timer: Operation, Monostable and Astable modes
Week 8: IC 565 PLL: Operation and applications
Week 9: IC 78xx/79xx Voltage regulators: Features, three terminal voltage regulators
Week 10: CMOS inverter, CMOS combinational and sequential circuits
Week 11: Digital to Analog Converters: Weighted resistor DAC and R-2R ladder DAC
Week 12: Analog to Digital Converters: Flash type, counter type, successive approximation type and dual slope integrating type.

Books and references

TEXT BOOKS:

1. D.Roy Choudhry, Shail Jain, -Linear Integrated Circuits, New Age International Pvt. Ltd., 2018, Fifth Edition.

2. Sergio Franco, -Design with Operational Amplifiers and Analog Integrated Circuits, 4th Edition, Tata Mc Graw-Hill, 2016

3. John P. Uyemura, -- Introduction to VLSI Circuits and Systems, Wiley, 2006

REFERENCES:

1. Ramakant A. Gayakwad, -Operational Amplifiers and Linear IC, 4th Edition, Prentice Hall / Pearson Education, 2015.

2. Robert F.Coughlin, Frederick F.Driscoll, -Operational Amplifiers and Linear Integrated Circuits, Sixth Edition, PHI, 2001.

3. B.S.Sonde, -System design using Integrated Circuits , 2nd Edition, New Age Pub, 2001.

4. Gray and Meyer, -Analysis and Design of Analog Integrated Circuits, Wiley International,5th Edition, 2009.

5. William D.Stanley, -Operational Amplifiers with Linear Integrated Circuits, Pearson Education,4th Edition,2001.

6. S.Salivahanan & V.S. Kanchana Bhaskaran, -Linear Integrated Circuits, TMH,2nd Edition, 4 th Reprint, 2016