Evolution of Air Interface towards 5G


Prof. Suvra Sekhar Das

IIT Kharagpur

*Additional GST and optional Exam fee are applicable.

SKU: IIT Kharagpur Category:


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 mm wave 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.


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.


Digital communications, Mobile Communications / Wireless Communications


All wireless telephony service providers and equipment manufactures


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. 

Additional information



Total hours


Certification Process

1. Join the course
Learners may pay the applicable fees and enrol to a course on offer in the portal and get access to all of its contents including assignments. Validity of enrolment, which includes access to the videos and other learning material and attempting the assignments, will be mentioned on the course. Learner has to complete the assignments and get the minimum required marks to be eligible for the certification exam within this period.

COURSE ENROLMENT FEE: The Fee for Enrolment is Rs. 2000 + GST

2. Watch Videos+Submit Assignments
After enrolling, learners can watch lectures and learn and follow it up with attempting/answering the assignments given.

3. Get qualified to register for exams
A learner can earn a certificate in the self paced course only by appearing for the online remote proctored exam and to register for this, the learner should get minimum required marks in the assignments as given below:

Assignment score = Score more than 50% in at least 6/8 assignments.
Exam score = 50% of the proctored certification exam score out of 100
Only the e-certificate will be made available. Hard copies will not be dispatched.”

4. Register for exams
The certification exam is conducted online with remote proctoring. Once a learner has become eligible to register for the certification exam, they can choose a slot convenient to them from what is available and pay the exam fee. Schedule of available slot dates/timings for these remote-proctored online examinations will be published and made available to the learners.

EXAM FEE: The remote proctoring exam is optional for a fee of Rs.1500 + GST. An additional fee of Rs.1500 will apply for a non-standard time slot.

5. Results and Certification
After the exam, based on the certification criteria of the course, results will be declared and learners will be notified of the same. A link to download the e-certificate will be shared with learners who pass the certification exam.


Course Details

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.


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