ECE-605 COMMUNICATION ENGINEERING

Spectral Analysis: Fourier Series, Response of a linear system, Normalised power in a Fourier expansion, Power spectral density. The Fourier Transform, Convolution, Parseval’s theorem, Power and energy transfer through a network, Auto and Cross correlations.

Random Variables and Processed: Probability, Mutually exclusive events, Joint probability, Statistical independence, random veriables, probability density function, average and veriance. The Gaussian probability density. The error function, Mean and variance sum of random variables, Probabilty density of Z=X+Y. The Central limit theorem, correlation between random variables, auto correlation, power spectral density.

Amplitude Modulation Systems: Frequency translation, Recovery of base band signal, amplitude modulation, maximum allowable modulation. The square law demodulator, spectrum of AM signal, balanced modulator, SSB modulation and generation, VSB,FDM.

Frequency Modulation System: Phase and frequency modulation and thheir relationship, frequency deviation, spectrum of FM signal, BW of FM signal, Effect of modulation on BW , constant BW, FM phaser diagram, Narrow band FM, Armstrong and parameter variation methods of FM generation. FM demodulators.

Digital Modulation Techniques: Sampling theorem, Quantizxation of signals, Quantization error, Pulse Code modulation (PCM) and the system, companding, Time division multiplexing (TDM), DPCL, DM, ADM, PSK, FSK and DPSK.

Niose in Communication system: Source of noise, Frequency domain representation of noise, Superposition of noise, Linear filtering, Noise bandwidth, Resistor noise, Available power, Noise temperature, Two ports Noise bandwidth, Input noise temperature, Noise figure, Equivalence-noise temperature of a cascade, an example of recieving system.

TEXTBOOK

1. Principles of communication system by H.Taub and D.L. Shilling

2. An introduction to the principle of Communication Theory by J.C. Hancock, Mc Graw Hill.

3. Signal Processing, Modultaion and noise by Betts, English University Press, London.

4. Communication System by A.B. Carlson, Mc Graw Hill.

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