CSVTU BE V Semester ET&T Communication System – I Syllabus

Chhattisgarh Swami Vivekanand Technical University, Bhilai

Semester : V Branch: Electronics & Telecommunication

Subject: Communication System – I

Unit – I

Spectral Analysis:

Fourier Series, Normalised power in a Fourier expansion, Power Spectral Density, Fourier

transform, Perseval’s Theorem, Power & Cross co-relation, Auto co-relation, Bandlimiting of waveforms.


Unit – II

Linear Modulation: Amplitude Modulation:


Amplitude Modulation, Generation of AM waves, Demodulation of

AM waves, Suppressed carrier modulation, DSB-SC modulation, Generation of DSB-SC signals, Detection of


DSB-SC signals, Single-tone modulated DSB-SC, Quadrature AM, SSB-SC modulation, Generation of SSB-SC


signals, Detection of SSB-SC signals, VSB, Comparison of various AM systems.


Unit – III

Exponential Modulation: Phase & Frequency Modulation:


Mathematical representation of FM & PM signals,

Single tone FM, Multitone FM, Transmission BW of FM waves, WBFM and NBFM, Generation of FM waves,


Demodulation of FM waves, Interference, De-emphasis and Pre-emphasis filtering.


Unit – IV

Radio Transmitters & Receivers:


General block diagram of AM, FM and PM transmitters, Block diagram of high

level and low level AM Transmitter



High level transistor collector modulator, Low level transistor modulator,

Balanced modulator for SSB generation. Reactance modulator for FM generation, Direct FM transmitter, Indirect


(Armstrong) FM transmitter, Block diagram of Stereophonic FM transmitter


TRF receivers – sensitivity & Selectivity, Superhetrodyne receivers – image frequency & its rejection, SSB


receivers. Block diagram of FM receivers.




(This unit should be covered in a Block diagrammatic approach rather

than covering the detail of the circuits.)



Unit – V

Noise in CW Modulation: V


arious noise sources, Noise calculations for – single noise sources, multiple noise

sources, cascade and cascade amplifiers. Noise figure and its measurement, Noise temperature, Equivalent input


noise resistance, noise Bandwidth, noise measurement on line and channel. Band – pass noise representation,


noise figure calculation for various modulation systems (DSB-AM, DSB-SC, SSB and FM), Effects of transmitter


noise. Noise in Angle Modulated systems: Noise in FM systems, Threshold in FM, Threshold improvement through


De-emphasis, Noise in phase modulation.


Name of Text Books:

1. Principles of Communication Systems


by Taub and schilling ; Tata McGraw Hill




A Text Book of Analog & Digital Communication – P. Chakrabarti, Dhanpat Rai & Co.

Name of Reference Books:



Electronic Communication systems by George F Kennedy : Tata McGraw Hill




Communication Systems Engineering, Proakis, 2nd

Ed., Pearson Education



Electronic Communications, Roddy & Collen, 4th

Ed., PHI



Analog and Digital Communication systems, Martin S. Roden, 5th

Ed., Shroff Publishers & Distributors

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