EC305

Communication Theory

Pre-Requisite: EC201 and MA206
Contact Hours and Credits : ( 3 -0- 0 ) 3

Objective: 

To develop a fundamental understanding on communication systems with emphasis on analog modulation techniques.

Topics Covered:

Basic blocks of Communication System. AM, Linear Modulation - DSB-SC, SSB and VSB. Frequency Translation, Frequency-Division Multiplexing, Methods of generation and detection.

Angle Modulation - Frequency and Phase modulation. Transmission Bandwidth of FM signals, Methods of generation and detection, FM Stereo Multiplexing, Super heterodyne receiver.

Tuner amplifiers - Design of Class A, B, AB, C, D, S and E power amplifiers. Use of  power amplifiers in Transmission.

Circuits for generation and detection of AM, DSBSC, SSBSC, FM signal.

Noise in CW modulation systems - SNR calculations for synchronous detection of DSB and SSB and envelope detection of AM.SNR calculations for angle modulation system. Pre-emphasis and de-emphasis. Threshold effect. Noise in Communication subsystems - Internal and external noise.

Course Outcomes:

Students are able to

  • CO1: Apply the basic knowledge of signals and systems and understand the basics of communication system  and   analog modulation techniques.
  • CO2: Apply the basic knowledge of transistor and describe the power amplifiers.
  • CO3: Evaluate the communication system performance in the presence of  noise and summarize the merits and demerits of all the conventional analog modulation system.
  • CO4: Design as well as conduct experiments, analyze and interpret the results to provide valid conclusions for modulators ,demodulator and communication systems using  CAD tool.

Text Book:

  • S. Haykins, Communication Systems (4/e), Wiley, 2001.
  • B. Carlson, Introduction to Communication Systems (4/e), McGraw-Hill, 2009.

Reference Books:

  • Kennedy, Davis, Electronic Communication Systems (4/e), McGraw Hill, 1999.
  • J. Smith, Modern Communication Circuits (2/e), McGraw Hill, 1997.
  • J.S. Beasley & G.M. Miler, Modern Electronic Communication(9/e), Prentice-Hall, 2008.