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  • 12:54 AM, Saturday, 11 Jul 2020

Course Undergraduate
Semester Sem. V
Subject Code AV314
Subject Title Communication System I


Fundamental of communication systems, signals and information, system block diagram, performance metrics and data rate limits. Review of Fourier series and Transforms – Energy/Power Spectral Density.

Introduction to carrier modulation - Amplitude modulation, AM spectrum, power relations, double sideband suppressed carrier (DSBSC) and single sideband modulation (SSB) schemes, DSBSC/SSBSC spectrum, Vestigial sideband modulation and spectrum. Generation of AM signals, modulators and transmitters, product modulators, square-law modulators and balanced modulators. Frequency translation and frequency division multiplexing, Propagation characteristics of AM signals.

Frequency modulation (FM), Narrowband FM, Wideband FM, FM spectrum, Transmission bandwidth, Generation of FM signals: direct and indirect methods. Phase modulation- relationship between FM and PM signals. Radio Receivers - TRF and super-heterodyne receivers, Image frequency, Intermediate frequency (IF), Automatic gain control. AM demodulation - coherent detection, envelope (non-coherent) detection of AM signals, DSB-SC and SSB demodulation. FM demodulation - Basic FM demodulators, Amplitude limiting, ratio detector, PLL based FM detection, Pre-emphasis and de-emphasis in FM

Text Books

1. B.P. Lathi, Modern Digital and Analog Communication, 3/e

2. John G Proakis and M. Salehi, Communication System Engineering, 2/e

3. R.E. Ziemer and W.H. Tranter, Principles of Communications

4. Simon Haykin, Communication Systems