EC321 Digital Communication

Course Name: 

EC321 Digital Communication


B.Tech (ECE)




Programme Core (PC)

Credits (L-T-P): 

(3-1-0) 4


Introduction to digital communication systems, Pulse modulation systems, Non-uniform quantization and companding, Waveform coding techniques; Line codes; Base band pulse transmission, Matched filter and Inter symbol interference; Pass Band digital transmission, Digital modulation schemes; Digital signaling over a channel with inter-symbol interference and additive Gaussian noise, Signal design for band limited channels. Optimum demodulator for inter-symbol interference and additive Gaussian noise, coded modulation for bandwidth constraint channels-PSK, QAM & Trellis coded modulation, Linear equalization, decision feedback equalization, adaptive equalization. Introduction to spread spectrum systems. Introduction to coding theory – Entropy, mutual information, Shannon encoding  algorithm Shannon Hartley law, source and channel coding theorems, Huffman and Shannon Fano coding, Error control coding: Linear block codes - Hamming Codes, Cyclic codes and Convolutional codes.

Course Objectives:
  • The aim of the course is to give the students good knowledge of digital subsystems and systematic methods for analyzing and designing communications systems. The aim is also to give basic knowledge of how to describe digital systems in a high level design language.
Course Outcomes:
After completing the course the students must be able to
  • Understand the importance of modulation and demodulation in digital communication systems.
  • Develop skills in analysis and design of digital modulation schemes such as ASK,FSK,PSK,QPSK and MSK
  • Develop skills in analysis and design of Spread Spectrum Techniques.
  • Develop skills in analysis and design of different information coding techniques.
  • Understand the design tradeoffs and performance of digital communications systems. 
  • Learn about practical digital communication systems. 
  • Appreciate the role of digital communication in day to day human life.


S.Haykin, Communication systems, John Wiley 2001
B.Sklar, Digital Communications, Pearson Education, 2001
J.G.Proakis, Digital Communications, McGraw Hill, 2000.


Electronics and Communication Engineering(ECE)

Contact us

Prof. N. Shekar V. Shet, Professor and Head, 
Department of ECE, NITK, Surathkal
P. O. Srinivasnagar,
Mangalore - 575 025 Karnataka, India.

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