Data Communications

Download Data and Computer Communications

Download Modern Digital and Analog Communication Systems




310242: DATA COMMUNICATIONS
Teaching Scheme: Lectures: 3 Hrs/Week
Examination Scheme: Theory: 100 Marks
Objectives:
• To learn and understand fundamentals of data communications
• To understand the conceptual and analytical differences between analog and digital
communication

Unit I (06 Hrs)
Introduction: Communication System, Modulation, Baseband and Carrier Communication,
Amplitude modulation: DSBFC, DSBSC, SSB, QAM, Carrier Acquisition, Superheterodyne
AM Receiver, Angle Modulation: Frequency modulation, phase modulation, Analysis of FM,
Bandwidth Requirements, Equivalence between FM and PM Digital Continuous Wave
Modulation: ASK, FSK and PSK and Modems

Unit 11 (06 Hrs)
Pulse Modulation: Sampling theorem, Natural and Flat Top Sampling, PAM, Pulse Time
Modulation, Pulse Transmission over Band Limited Channel, Effect of Gaussian Type Noise
on Digital Transmission, Crosstalk, Eye Diagram Line Codes: Bipolar, Unipolar, RZ, NRZ,
Manchester, AMI

Unit III (06 Hrs)
Pulse Code Modulation: Encoder and Decoder, PCM - TDM, Tl Carrier System,
Quantization Noise, Companding, DPCM, ADPCM, Delta modulation, Slope overload and
Adaptive Delta Modulation, Scrambling, Digital Carrier Systems, Digital Multiplexing

Unit IV (06 Hrs)
Information and Coding: Measure of information, entropy, information rate, Shannon's
theorems on channel capacity, Optimum Codes, Huffman Code, Code Efficiency, Error
Control Coding, Methods of Controlling Errors, Types of Errors, Types of Codes, Linear
Block Codes: Matrix Description of Linear Block Codes, Error detection and correction
capabilities, Hamming Distance, Hamming Bound, Hamming Codes, CRC Block Codes,
Syndrome Calculation, Error Detection and Correction, Handshaking Techniques, FEC, ARQ
- Stop and Wait, Go Back N, Selective Repeat, Channel Throughput and Efficiency

UnitV (06 Hrs)
Digital Communications Technologies: SF, ESF Framing, DS1/T1, B8ZS, DSU, CSU,
HDSL, Digital Hierarchy, Digital Services, ISDN, Frame Relay, SONET, ATM, BISDN,
SMDs, Video on Demand, ADSL
Cellular Telephone Systems: Spread Spectrum Systems, DS/SS, FH/SS, Cellular Telephony,
GPS, Transmission Media, PSTN

Unit VI (06 Hrs) Computer Network: Need and Applications of Network, Network
Architecture, Protocols and Standards, OSI Model, TCP/IP Model, Network topology
(Physical & logical), Types of Networks: Peer to Peer, Client-Server, LAN: Ethernet, Token
Ring, FDDI, MAN: DQDB, SMDS, WAN: Architecture, Transmission Mechanism,
Addressing, ISDN and Broadband ISDN

Transmission Media: Guided Media - Twisted Pair, Coaxial and Fiber-optic cables,
Unguided Media (Wireless): Radio and Micro Waves, Infrared
Switching Techniques: Circuit switching, Packet switching and message switching,
Telephone network, High-Speed Digital Access: DSL, Cable Modems and Sonets

Text Books:
1. Stallings W., "Data and Computer Communications", Sixth Edition, Prentice Hall of India
Pvt. Ltd., 2002, ISBN 81-203-2067-0
2. Lathi B. "Modern Digital and Analog Communication Systems", 3rd Edition, Oxford
University Press, 2003, ISBN 0-19-511009 - 9
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Reference Books:
1. Shanmugam K., "Digital and Analog Communication Systems", John Wiley & Sons (Asia)
Pvt. Ltd. ISBN 9971-51-146-0
2. Fourauzan B., "Data Communications and Networking", 3rd edition, Tata McGraw-Hill
Publications, 2004, ISBN 0 - 07 - 058408 - 7
3. Godbole A., "Data Communications and Networks", Tata McGraw-Hill Publications, 2002, 0
- 07 - 047297 - 1
4. Gupta P., "Data Communications", PHI, 2004, ISBN 81 - 203 - 1118 - 3
5. Shay W., "Understanding Data Communications and Networks", Third Edition, Brooks Kale
Thomson Learning/Vikas Publishing House, ISBN 981-254-966-8
6. Garcia L., Widjaja I., "Communication Networks - Fundamental Concepts and Key
Architectures" 2nd edition, Tata McGraw-Hill, 2000, ISBN 0 - 07 - 040235 – 3