EC 2252                      COMMUNICATION  THEORY                                          3  1  0  4


AIM
To study the various analog communication fundamentals viz., Amplitude modulation and demodulation, angle modulation and demodulation. Noise performance of various receivers and information theory with source coding theorem are also dealt.

OBJECTIVE

  • To provide various Amplitude modulation and demodulation systems.
  • To provide various Angle modulation and demodulation systems.
  • To provide some depth analysis in noise performance of various receiver.
  • To study some basic information theory with some channel coding theorem.


1.                  AMPLITUDE MODULATION SYSTEMS                                                            10
Review of Spectral Characteristics of Periodic and Non-periodic signals; Generation and Demodulation of AM, DSBSC, SSB and VSB Signals; Comparison of Amplitude Modulation Systems; Frequency Translation; FDM; Non – Linear Distortion.

2.                  ANGLE MODULATION SYSTEMS                                                                      8
Phase and Frequency Modulation; Single tone, Narrow Band and Wideband FM; Transmission Bandwidth; Generation and Demodulation of FM Signal.

3.                  NOISE THEORY                                                                                                    8
Review of Probability, Random Variables and Random Process; Guassian Process; Noise – Shot noise, Thermal noise and white noise; Narrow band noise, Noise temperature; Noise Figure.

4.         PERFORMANCE OF CW MODULATION SYSTEMS                                       10                                           
Superheterodyne Radio receiver and its characteristic; SNR; Noise in DSBSC systems using coherent detection; Noise in AM system using envelope detection and its FM system; FM threshold effect; Pre-emphasis and De-emphasis in FM; Comparison of performances.

5.         INFORMATION THEORY                                                                                     9

Discrete Messages and Information Content, Concept of Amount of Information, Average information, Entropy, Information rate, Source coding to increase average information per bit, Shannon-Fano coding, Huffman coding, Lempel-Ziv (LZ) coding, Shannon’s Theorem, Channel Capacity, Bandwidth- S/N trade-off, Mutual information and channel capacity, rate  distortion theory,  Lossy Source coding.      


TUTORIAL     15                                                            TOTAL : 60
TEXT BOOKS

  1. Dennis Roddy & John Coolen - Electronic Communication (IV Ed.), Prentice Hall of       India.
  2. Herbert Taub & Donald L Schilling – Principles of Communication Systems ( 3rd Edition ) – Tata McGraw    Hill, 2008.

REFERENCE:

  1. Simon Haykin, Communication Systems,  John Wiley & sons, NY, 4th Edition, 2001.
  2. Bruce Carlson - Communication Systems. (III Ed.),  Mc Graw Hill.
  3. B.P.Lathi, Modern Digital and Analog Communication Systems, Third Edition, Oxfod Press,2007.
  4. R.P Singh and S.D.Sapre, “Communication Systems – Analog and Digital”, Tata McGraw Hill, 2nd Edition, 2007.
  5. John G. Proakis, Masoud Salehi, Fundamentals of Communication Systems, Pearson Education, 2006.