Evolution Of Air Interface Towards 5G

By Prof. Suvra Sekhar Das   |   IIT Kharagpur
Learners enrolled: 2045
Air Interface is one of the most important elements that differentiate between 2G, 3G, 4G and 5G. While 3G was CDMA based, 4G was OFDMA based; this course reveals the contents of air interface for 5G. While 4G brought in a deluge of infotainment services, 5G aims to provide extremely low delay services, great service in crowd, enhanced mobile broadband (virtual reality being made real), ultra reliable and secure connectivity, ubiquitous QoS, and highly energy efficient networks. The above mentioned requirements are expected to be met by several advancement in technologies such as (i) new waveforms (termed as 5G NR, the new radio), (ii) millimeter wave technology, (iii) massive multiple antenna technologies (iv) non orthogonal multiple access (v) heterogeneous networks such as small cells and device to device communications (vi) energy savings in radio access network and (vii) ubiquitous quality of service among others. In this course we aim to provide insight into the fundamentals of the above mentioned methods, which are essential components of 5G Air Interface. We will begin with an overview of 5G technology aspects. Then we will discuss 5G new radio waveform, its genesis and variants. Thereafter we will introduce non orthogonal multiple access scheme. Next we will discuss various aspects of mmwave communication technology. Massive MIMO will be presented next, wherein we will discuss the essential building blocks and design challenges. While all these will be discussed that propagation models which are essential for performance analysis will also be briefly presented. This will be followed by performance analysis of heterogeneous networks including small cells and device to device communication. Then we will present energy saving methods for radio access network through multi objective optimization. The final part of the course will touch upon performance characterization of QoS for delay sensitive traffic for radio access networks.The intended audience includes research scholars who are interested to pursue 5G and beyond technologies to bring improvement in performance, which can make these technologies even more commercially viable. It is also expected to provide practicing engineers an opportunity 

INTENDED AUDIENCE : Senior undergraduate students, graduate level students, MS and PhD students, in the broad domain of telecommunications engineering who are interested to work further or even gather the latest developments in the domain of wireless communication technology leading to 5G air interface.The course is also suitable for practicing engineers in the domain of wireless communications who want to be familiar with the new technology changes that are expected to be engines of 5G air interface / radio access technology so that they can equip themselves with the new knowledge in a composite manner. 
PREREQUISITES : Digital communications, Mobile Communications / Wireless Communications
INDUSTRY SUPPORT : All wireless telephony service providers and equipment manufactures
Course Status : Completed
Course Type : Elective
Duration : 8 weeks
Category :
  • Electrical, Electronics and Communications Engineering
Credit Points : 2
Level : Undergraduate/Postgraduate
Start Date : 21 Feb 2022
End Date : 15 Apr 2022
Enrollment Ends : 21 Feb 2022
Exam Date : 23 Apr 2022 IST

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

Page Visits

Course layout

Week 1  :  Overview of 5G communication technology, (operating scenarios, mm wave technology, propagation models), 
Week 2  :  Waveform in 5G, (W-OFDM, F-OFDM, UFMC, FBMC, GFDM, adaptive OFDM)
Week 3  :  Modulation and coding in 5G
Week 4  :  Propagation Characteristics of 5G Channel models
Week 5  :  MIMO communication essentials
Week 6  :  Massive MIMO in 5G (massive MIMO, pilot contamination, Beam forming)
Week 7  :  Heterogeneous Ultra Dense networks in 5G, (Small cells, D2D, MIMO-NOMA)
Week 8  :  Ubiquitous Quality of Service Provisioning for real time traffic.

Books and references

Evolution of Air Interface for 5G, River Publishers 2018, Journal and conference papers, white papers. 

Instructor bio

Prof. Suvra Sekhar Das

IIT Kharagpur
Dr. Suvra Sekhar Das is currently serving as associate professor at the G. S. Sanyal School of Telecommunictions in Indian Institute of Technology Kharagpur. He has completed Ph.D. from Aalborg University, Aalborg, Denmark. He has worked as Senior Scientist with the Innovation Laboratory of Tata Consultancy Services. His research interests include cross-layer optimization of mobile broadband cellular networks, 5G, Broadband Mobile Communications, 5G Waveform design GFDM FBMC UFMC, heteogeneous networks Femto Cells Device to Device communication, Multi objective optimization for radio access networks, Green radio network design Packet Scheduling and radio resource allocation with link adaptation, MIMO communications, base-band transceiver design for broadband wireless communication systems. He has delivered several tutorials and seminars on next generation wireless communications. He has guided several PhD students, published several research papers in international journals and conferences. He has co-authored two books titled “ Adaptive PHY-MAC Design for Broadband Wireless Systems”and “Single- and Multi-Carrier MIMO Transmission for Broadband Wireless Systems” . He has developed teaching resource “fading channel and mobile communications ” freely available as interactive web material for learners of mobile communications (http://fcmcvlab.iitkgp.ac.in/ with nearly 2 lacs hits). He has taught several subjects such as Modern digital communication techniques, Broadband access systems, mobile communications and fading, teletraffic engineering, introduction to wireless communication and MIMO communications. 

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: 23 April 2022 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.


Average assignment score = 25% of average of best 6 assignments out of the total 8 assignments given in the course.
Exam score = 75% of the proctored certification exam score out of 100

Final score = Average assignment score + Exam score

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 Kharagpur .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

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