Course Details

Subject {L-T-P / C} : EE4703 : Communication Systems Laboratory {0-0-2 / 1}
Subject Nature : Practical
Coordinator : Prof. Susmita Das


Amplitude modulation DSB AM Modulator, Calculation of the modulation index, Observation of the linearity curve of modulator, DSB AM reception using Envelop Decoder, Operation of AM with Suppressed carrier Study of SSB,Signal Generator, SSB Signal Demodulation, Calculate the sensitivity and Selectivity of a AM Receiver Frequency modulation Modulation Characteristic of Varactor Modulator, measurement of frequency Deviation and calculation of modulation index, Demodulation characteristic of the FM Demodulator (Foster- Seeley Demodulator), FM demodulation using Ratio Demodulator, Phase locked loop Detector and Quadrature detector, FM super Heterodyne Receiver Phase Modulation: Phase Modulation, Phase Demodulation Analog Signal Sampling and its reconstruction Natural Sampling and its reconstruction, Sample and Hold and its reconstruction, Flat loop Sampling and its reconstruction, Effect of different sampling frequencies, Effect of varying the sampling frequency duty cycle Study of TDM Pulse Amplitude Modulation / Demodulation with Transmitter lock and Channel identification information linked directly to the receiver Sampling and Pulse Code Modulation.

Course Objectives

  1. Knowledge about principles and techniques of modern communication systems
  2. Knowledge in various methods of analog and digital communication modulation schemes, transmitter and receiver design
  3. Analyse the effect of noise and evaluate system performance.

Course Outcomes

Understand basic elements of a communication system
2. Conduct analysis of baseband signals in both time domain and in frequency domain
3. Demonstrate understanding of various analog and digital modulation and demodulation techniques.

Essential Reading

  1. S. Haykin, Communication systems, John Wiley , (4/e), 2001
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Supplementary Reading

  1. B. P. Lathi, Modern Digital and Analog Communication Systems, Oxford University Press
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