Analog and digital communications I (Hinglish)

By Prof. Ribhu | IIT Guwahati

Learners enrolled: 3103 | Exam registration: 362

ABOUT THE COURSE:

This course will cover the basic set of tools required to understand the modelling and analysis of communications systems in Hinglish i.e. colloquial Hindi written in Roman text. We will start the course by a quick revision of the ideas of Fourier analysis and Hilbert transforms, followed by a detailed discussion of analog modulation techniques including AM, and angle modulation. We will then revisit ideas from probability theory and develop the idea of random processes as signals to introduce the concept of AWGN, that will be used to study the effect of noise on analog modulation. In the second half of the course, viz. digital communications, we will discuss the ideas of sampling and quantization and follow them up with a brief discussion on baseband pulse transmission. We will conclude the course by introducing ideas related to information theory. This course is suitable for all students and professionals as well as students preparing for competitive examinations.

INTENDED AUDIENCE: Third and Fourth year UG students

INDUSTRY SUPPORT: Qualcomm, Samsung, Analog Devices, NVidia

Summary

Course Status :	Ongoing
Course Type :	Core
Language for course content :	English
Duration :	12 weeks
Category :	Electrical, Electronics and Communications Engineering Communication and Signal Processing
Credit Points :	3
Level :	Undergraduate
Start Date :	19 Jan 2026
End Date :	10 Apr 2026
Enrollment Ends :	02 Feb 2026
Exam Registration Ends :	20 Feb 2026
Exam Date :	24 Apr 2026 IST
NCrF Level	4.5 — 8.0

Note: This exam date is subject to change based on seat availability. You can check final exam date on your hall ticket.

Page Visits

Course layout

Week 1: Spectral Analysis

Time and Bandwidth, Hilbert transforms, Low Pass Equivalents

Week 2: Random Processes

Complex Random Variables, Random Vectors, Random Processes and their properties

Week 3: Random Processes

Random Processes as Signals, Power Spectra, Low pass and band pass random processes.

Week 4: Noise and Modulation

Noise, Types of Noise, The need for modulation, AM, Generation and Demodulation of conventional AM

Week 5: Amplitude Modulation

DSBB-SC AM, SSB and QAM, The Phase Locked Loop, Angle Modulation

Week 6: Angle Modulation

Spectral Analysis of FM, Generation and Demodulation of FM

Week 7: Effect of Noise on Analog Modulation

Noise in CW Systems, Effect of Noise on AM, Effect of noise on FM, Noise Figure, Link Budget

Week 8: Analog to Digital Conversion

Sampling, Natural and Flat top sampling, Bandpass Sampling, Sampling of Random Processes, The quantization problem

Week 9: Quantization

Optimal Quantization, Uniform Quantization, Companding, PCM, Correlation

Week 10: PCM

The Wiener Hopf equations, DPCM, Delta Modulation, Encoding of digital Pulses

Week 11: Reception

The matched filter, detection of binary signals in noise, the probability of error

Week 12: Signal Spaces

Vector Spaces, Signals as Vectors, Gram Schmidt Orthogonalization, Constellations

Books and references

Simon Haykin, 2000, Communication Systems (4e), Wiley
John G. Proakis and Masoud Salehi. 1994. Communication systems engineering. Prentice- Hall, Inc., USA.

Instructor bio

Prof. Ribhu

IIT Guwahati

Prof. Ribhu is currently working as an assistant professor in the department of Electronics and Electrical Engineering at IIT Guwahati. He received his B.E. degree in Electronics and Communication Engineering from Panjab University, Chandigarh, India in 2009, and M. Tech and PhD degrees from the Department of Electronics and Communication Engineering, IIT Roorkee. After submitting his PhD thesis in July 2015, he joined the Signal Processing for Communication (SPC) lab at IISc, Bengaluru as a project associate. Following his thesis defense in May 2016, he continued at the SPC lab as an IISc Institute research associate till March 2017. He is holding the current position since April 2017. His research interests include physical layer design for wireless sensor networks, statistical and adaptive signal processing, massive MIMO systems, and detection theory.

Course certificate

The course is free to enroll and learn from. But if you want a certificate, you have to register and write the proctored exam conducted by us in person at any of the designated exam centres.

The exam is optional for a fee of Rs 1000/- (Rupees one thousand only).

Date and Time of Exams: April 24, 2026 Morning session 9am to 12 noon; Afternoon Session 2pm to 5pm.

Registration url: Announcements will be made when the registration form is open for registrations.

The online registration form has to be filled and the certification exam fee needs to be paid. More details will be made available when the exam registration form is published. If there are any changes, it will be mentioned then.

Please check the form for more details on the cities where the exams will be held, the conditions you agree to when you fill the form etc.

CRITERIA TO GET A CERTIFICATE

Average assignment score = 25% of average of best 8 assignments out of the total 12 assignments given in the course.
Exam score = 75% of the proctored certification exam score out of 100

Final score = Average assignment score + Exam score

Please note that assignments encompass all types (including quizzes, programming tasks, and essay submissions) available in the specific week.

YOU WILL BE ELIGIBLE FOR A CERTIFICATE ONLY IF AVERAGE ASSIGNMENT SCORE >=10/25 AND EXAM SCORE >= 30/75. If one of the 2 criteria is not met, you will not get the certificate even if the Final score >= 40/100.

Certificate will have your name, photograph and the score in the final exam with the breakup.It will have the logos of NPTEL and IIT Guwahati .It will be e-verifiable at nptel.ac.in/noc.

Only the e-certificate will be made available. Hard copies will not be dispatched.

Once again, thanks for your interest in our online courses and certification. Happy learning.

- NPTEL team

SWAYAM Helpline / Support