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EC406ANALOG COMMUNICATION

L-T-P: 2-1-0 Credits: 3

MODULE I

INTRODUCTION TO COMMUNICATION SYSTEM: Introduction, Orientation Introduction tocommunication system, Need formodulation, Amplitude modulation, Time domain andFrequency domaindescription, Power relations in AM wave, , Square law modulator, Switching Modulator, Detection of AM waves, Square law detector, Envelope detector.DSB MODULATION:DSB-SC modulation, time domain and frequency domain description,Generation of DSB-SC waves, Balanced Modulator, Ring Modulator, Coherent detection of

DSB-SCModulated waves, COSTAS Loop, Radio transmitter, Classification, AM Transmitterblock diagram.

MODULE II

SSB MODULATION:Frequency domain description, Frequency discrimination method forgeneration of AM- SSB Modulated wave, Time domain description, Phase discrimination

method for generating of AM SSB Modulated waves, Demodulation of SSB Waves, Vestigialside band modulation, Generation of VSB modulated wave, Time domain description, Envelop

detection of VSB wave pulse carrier, Comparison of AM techniques, Applications of differentAM waves.ANGLE MODULATION CONCEPTS:Frequency Modulation, Single tone frequency modulation,

Spectrum Analysis of Sinusoidal FM Wave, Narrow band FM, Wide band FM, ConstantAverage Power,Transmission band width of FM wave, Generation of FM Waves, Comparison

of AM& FM.

MODULE III

ANGLE MODULATION METHODS: Generation of FM wave: Direct method, Parametric variation

method, varactor diode, Reactance modulator, Armstrong method, Detection of FM waves,Balanced frequency discriminator, Zero crossing detector, Phase locked loop, Foster seelydiscriminator, ratio detector, FM transmitter block diagram.NOISE:Nose in DSB and SSB system, Nose in A M system, Nose in angle modulated system,Threshold effect in Angle modulation system, Pre-emphasis and De-emphasis.

MODULE IV(Directive Study)

RECEIVERS:Receiver types, Tuned Radio Frequency receivers, Super heterodyne receiver, RFsection and characteristics, Frequency changing and Tracking, Intermediate frequency, AGC,

FM receiver, Comparison with AM receiver, amplitude limiting.PULSE MODULATION:Types of pulse modulation PAM, PWM, Generation and Demodulation of

PWM,PPM, Generation and Demodulation of PPM

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TEXT BOOKS:

1. Principles of Communication SystemsTaub & Schilling, Gautam Sahe, TMH, 3rd

Ed.2. Principles of Communication Systems - Simon Haykin, John Wiley, 2nd Ed.

REFERENCES:1. Electronics & Communication System George Kennedy and Bernard Davis, TMH2. Analog communications-K.N.Hari Bhat & Ganesh Rao, Pearson Publication, 2nd

Ed-

3. Communication Systems Second EditionR.P. Singh, SP Sapre, TMH, 2007.

4. Communication Systems B.P. Lathi, BS Publication, 2006.

University Examination Pattern:

The question paper shall consist of 2 parts. Maximum Total Marks: 100

Part A (20 marks) - Five Short answer questions of 4 marks each. All questions are compulsory.

There should be at least one question from each module and not more than two

questions from any module.

Part B (80 Marks) - Candidates have to answer two questions out of three from each module.

Each question carries 10 marks.

Last module is directive study which is for self learning only. In Part A and Part B there

will be questions from directive study for less than 10 marks.

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