Engineering Tutorials

EE-217-E: Digital and Analog Communication

Class Work:    50
Exam:    100

Unit-1: Communication system components: Introduction to Communication: Definition & means of communications; Digital and analog signals: sign waves, square waves; Properties of signals: amplitude, frequency, phase; Theoretical basis for data communication: Fourier analysis: Fourier series and Fourier Transform (property, ESD, PSD and Raleigh) effect of limited bandwidth on digital signal.

Unit-2: Data Transmission System: Physical connections: modulation, amplitude-, frequency-, phase- modulation; Data encoding: binary encoding (NRZ), Manchester encoding, differential Manchester encoding.  Transmission Media: Twisted pair-, co-axial-, fiber optic-cables, wireless media Transmission impairments: attenuation, limited bandwidth of the channels, delay distortion, noise, data rate of the channels (Nyquist theorem, Shannon limit).  Physical layer interfaces:    RS 232, X.21

Unit-3: Standards in data communications: Communication modes: simplex, half duplex, full duplex; Transmission modes: serial-, parallel-transmission; Synchronizations: Asynchronous-, synchronous-transmission; Type of services: connection oriented-, connectionless-services; Flow control: unrestricted simplex protocol, simplex stop- and -wait protocol, sliding window protocol; Switching systems: circuit switching; picketing switching: data gram , virtual circuits, permanent virtual circuits. Telephone Systems: PSTN, ISDN, asynchronous digital subscriber line. Multiplexing: frequency division-, time-, wave- division multiplexing

Unit-4: Security in data communications: Transmission errors: feedback-, forward-error control approaches; Error detection; Parity check, block sum check, frame check sequences; Error correction: hamming codes, cyclic redundancy check; Data encryption: secret key cryptography, public key cryptograph; Data compression: run length encoding, Huffman encoding.

Text Book:
Data Communications, Computer Networks and Open Systems Halsall Fred, (4th editon) 2000, Addison Wesley, Low Price edition
Reference Books:
Business Data Communications, Fitzgerald Jerry, 7th Ed. New York, 2001, JW&S,
Communication Systems, 4th Edi, by A. Bruce Carlson, Paul B. Crilly, Janet C. Rutledge, 2002, TMH.
Data Communications, Computer Networks and Open Systems, Halsall Fred, 1996, AW.
Digital Communications, J.G. Proakiss, 4th Ed., MGH
Satellite Communication, Pratt, John Wiley
Data & Computer Communications, W.Stallings  PHI
Digital & Data Communication systems, Roden 1992, PHI,
Introduction to Digital & Data Communications, Miller Jaico Pub.
Data Communications and Networking, Behrouz A. Forouzan, 2003, 2nd Edition, T.M.H

Note:    Eight questions will be set in all by the examiners taking at least one question from each unit.  Students will be required to attempt five questions in all.

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