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Indian Institute of Technology, Kharagpur

Modern Digital Communication Techniques

Indian Institute of Technology, Kharagpur and NPTEL via Swayam


The course Modern Digital Communication Techniques in taught in IIT Kharagpur as a 4 credit (4 hrs / week) core subject in the Masters program of Telecommunications systems engineering in the department of Electronics and Electrical Communication Engineering. It is taken in the first semester by master degree students, PhD students and Masters by research students. It is also taken as elective by final year UG students. It is also taken as a core subject by Dual degree students who specialize in the field of communication engineering.Digital communications has had one of the most profound influences in the development of the mankind. It is behind the success of today’s networked society. The objective of this course is to present the engineering principles, theories and practices, which are fundamental to the successful design of a digital communication system.
The course will delve into the design principles of transmitter and receiver so as to establish a reliable communication link. This course aims at enabling the participants to establish unambiguous mathematical statements describing every step of transmitting and receiving a signal through a communication link. It aims at exposing the details of noise, its modeling and its effect on communication systems design. It will cover methods of performance analysis of digital communication systems. Through use of fundamental knowledge developed in related areas of signal processing, the course aims at presenting a unified way of analyzing and designing a digital communication system. It will encompass fundamental aspects of estimation and detection theory, which are crucial in designing a complete receiver (synchronization, channel equalization, etc.).
At the end of the course, the participant will be equipped with methods of systematic representation, analysis and design of a digital communication system which are essential in designing communication systems with complex and futuristic requirements.
  • Students belonging to Electrical sciences with specialization in communication engineering.
  • Students on IT
  • Instrumentation, etc. may also take this subject as per curriculum requirement.
  • Analog communications in UG level
  • Digital communications in UG level
  • Signals and systems in UG level
  • All telecommunication equipment manufacturers and service providers
  • Defense officials
  • Research laboratories
  • ISRO,
  • BEL etc.



Week 1: Introduction to digital communication systemsWeek 2: Source CodingWeek 3: Characterization of Communication Signals & SystemsWeek 4: Signal space RepresentationWeek 5: Representation of Memory less Modulation MethodsIWeek 6: Nonlinear modulation methodsWeek 7: Optimal receivers of AWGNWeek 8: Receiver for non-ideal channelWeek 9: Probability of error of different modulation schemesWeek 10: Fundamentals of estimation and detection theory used in digital communicationWeek 11: Carrier phase and symbol timing synchronization techniquesWeek 12: Channel estimation and equalization techniques, Power Adaptation methods for colored noise channel

Taught by

Prof.Suvra Sekhar Das


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