Engineering Tutorials

EE-217 F Digital and Analog Communication

Section A: 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.

Section B: 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

Section C: 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

Section D: 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, (4 editon) 2000, Addison Wesley, Low Price edition

Reference Books:

• Business Data Communications, Fitzgerald Jerry, 7^th Ed. New York, 2001, JW&S,

• Communication Systems, 4^th 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, 4^th 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, 2 Edition, T.M.H

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