Course Details

Subject {L-T-P / C} : EE3402 : Communication Systems {3-0-0 / 3}
Subject Nature : Theory
Coordinator : Prof. Susmita Das


Representation of signals and systems in a communication system: Discrete and continuous spectra of signals, concepts of modulation and frequency translation, lowpass and bandpass signals and channels, concept of complex envelope, Hilbert transform and phase shifting Continuous wave (CW) modulation: AM, DSB/SC, SSB, VSB, methods of generation Demodulation techniques of CW modulation: coherent and non-coherent Nonlinear modulation techniques: FM and PM, narrowband FM, wideband FM, methods of generation FM spectrum Demodulation techniques for FM Frequency Division Multiplexing (FDM) Radio transmitters and receivers Sampling a signal by periodic pulse stream: spectra of ideally sampled signal, Nyquist sampling theorem, flat-top sampling, sampling of bandpass signals, examples of sampling circuits PAM, PWM, PPM spectra, generation and demodulation schemes Time-division multiplexing Performance of analog modulation schemes in AWGN : CNR, post-demodulation SNR and figure of merit for AM, DSB/SC, SSB, FM, threshold effect in FM, pre-emphasis and de-emphasis in FM, FMFB. Noise in receivers Noise figures Radio link design

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

1. 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.
4. Analyse the performance of modulation and demodulation techniques in various transmission environments

Essential Reading

  1. S. Haykin, Communication systems, John Wiley , (4/e), 2001
  2. 2. H. Taub, D. L Schilling, G. Saha,, Principles of Communication System, Tata McGraw Hill , 3rd Edition 2008

Supplementary Reading

  1. B. P. Lathi, Modern Digital and Analog Communication Systems, Oxford University
  2. A. B. Carlson, Communication Systems, Mc. Graw Hill.