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TH

3.7 SUBJECT TITLE : DIGITAL COMMUNICATION SYSTEMS (1563)

Year : Third Year

Teaching and Examination Scheme:

TEACHING SCHEME EXAM SCHEME & MAXIMUM MARKS

THEORY

HRS/WEEK

PRACTICAL

HRS/WEEK

PAPER

HRS.TH PR OR TW SW

2 2 3 100 - 50 - 50

RATIONALE :

From the subject Digital Communication Systems, the student should be able to

understand different digital communication systems such as telephone systems, integrated

services digital network (ISDN) etc. Also they should be able to understand different

communication techniques used in these different digital communication systems and the

advantages & disadvantages of digital communication.

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CONTEXT IN THE FORMOF LINK DIAGRAM SHOWING

INTERRELATIONSHIP OF SUBJECT AREA

HUMAN SCIENCESCommunication skillsGeneric SkillsIndustrial organization &

SupervisoryManagement

ENGINEERING SCIENCES

EngineeringDrawings

EngineeringMechanicsBasic ElectronicsElectronics materials

& components

CORE TECHNOLOGY

SUBJECTSInformation TechnologyWorkshop PracticeElectrical Engineering

ElectronicMeasurements &Instruments

Applied Electronics

Digital Techniques &Applications

Linear Integrated

CircuitsPower Electronics

TECHNOLOGYSUBJECTS

Microprocessor &Microcontroller

CommunicationSystems I

IndustrialElectronics

CommunicationSystems II

Instrumentation &Control Systems

Digital CommunicationSystems

BASIC SCIENCE

Applied MathematicsApplied Physics

Applied ChemistryJOB PROFILE

Self DeveloperMembership of

Family/Community/Nation

Life long learningTechnician in

industry as

MaintenanceEngineer,investigatoror DesignerR & DTechnician

Entrepreneur

CURRICULUM

OBJECTIVES

Attitude for personalDevelopment

Social skill for socialDevelopment

Continued learning skill forlife long learning

Technical skill for industrialactivity earning tolive domain

Supervisory skill,Investigation &Design skill

Testing skillDecision makingskillPlanning &scheduling skill

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DETAILED CONTENTS : 3.7

CHA-

PTERCONTENTS

MA-

R

K

S

HO-

URS

1 Introduction to digital communication

Basic digital communication system

Baseband & passband transmission

Multiplexing techniques : FDM, TDM.

Advantages & disadvantages of digital communication.

Practicals

1. Study of digital communication systems.

8 4

2 Signal Processing

Modulation schemes : FSK, PSK, QAM

Error control detection & correction. CRC, Linear block code.

Access techniques : FDMA, TDMA, CDMA.

Practicals

2. Study of Error detection & correction techniques.

22 14

3 Switching System

Basics of switching systems

Electronic space division switching.

Time division switching, Basic time division space switching. Basic

time division time switching Time multiplexed space switching

Two- stage network, three-stage network, N-stage network.

Practicals

3.Study of switching.4.Study of two stage network.

5.Study of three stage network.

24 12

4 Waveform coding techniques

Sampling theorem

Pulse code modulation

Delta modulation

Adaptive delta modulation.

Differential pulse code modulation.

Digital multiplexing : Synchronous Asynchronous,

Quasisynchronous

Practicals6. Study of pulse code modulation technique.

20

14

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CHA-

PTERCONTENTS

MA-

R

K

S

HO-

URS

5 Data Transmission Networks

LAN, MAN, WAN

Data transmission in PSTN

Modems : Synchronous, Asynchronous, Fax, Smart, Cable modem.

Switching techniques for data transmission: Circuit switching, Packet

switching.

Practicals

7.Study of Modem

8.Study of local area network

9.Study of public switched telephone network

16 16

6 Integrated Services digital network (ISDN)

ISDN services

X-400 family of standards

ISDN architecture

Message format for ISDN

ISDN address structure

ISDN standards expert system.

Practicals

10. Study of ISDN system.

10 4

IMPLEMENT STRATEGIES : -

At least one industrial visit to be arranged pertaining any of above topics. The visit report

shall be included in journal.

REFRENCES :

Sr.Author Title Edition

Year of

Publication

Publisher &

Address

1 T. Vishwanathan

Telecommunications

switching systems onnetworks

5th

1999

Prentice Hall of

India, New Delhi

2 Taub Schilling

Principles of

communication

systems

1st 1996McGraw Hill,

New York

3 CarlsonCommunication

systems1st 1994

McGraw Hill,

New Yor

k

4 Roddy coolenElectronic

communication4th 1998

Prentice Hall of

India,

New Delhi

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