Wireless Communications Research Group

Connecting the world

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Dr. Prabhat Kumar Upadhyay
WiCom Research Group at IIT Indore is conducting fundamental and applied research to cater to the emerging needs of the next generation wireless communication systems. The research at WiCom leverages tools from statistics, random processes, convex optimization, signal processing, and a few simulation packages. The group has currently developed and analyzed various spectral‐efficient algorithms and spatial diversity schemes by exploiting the emerging wireless techniques like MIMO, cooperative communication, and cognitive radio. These theoretical developments and findings will help the design of future wireless systems that can accommodate the increasing data traffic demands over a limited spectrum. They have found useful applications in the deployment of wireless cellular, ad-hoc and sensor networks. The group has contributed to a significant number of publications in IEEE journals and conferences over the last couple of years. The research at WiCom is partially supported by the Department of Science & Technology (DST) under fast-track scheme for young scientists
 
Suneel Yadav (Graduated in Feb. 2016)
(Presently, working as an Assistant Professor at IIIT Allahabad)
Research Area: Performance Evaluation and Optimization for Analog Network Coding with Spatial Diversity 
Cooperative relaying technique has gained significant research interest owing to its capability of enhancing coverage, reliability and throughput of wireless networks. Especially, two-way relaying has been proposed as a spectral-efficient scheme for half-duplex relay networks. With the simplest two-way relaying protocol, termed as analog network coding (ANC), two users can communicate bidirectionally with two-phase transmission via an amplify-and-forward based half-duplex relay. However, as such, the two-phase ANC protocol cannot exploit a direct link between the two users, even though if it exists physically. Towards this end, a three-phase ANC protocol can utilize the direct link by allowing the two source transmissions in two different time phases and the relay transmission in the third phase. Consequently, the three-phase ANC protocol can improve the system performance. Therefore, such relaying protocols greatly motivate us to enjoy with the spatial diversity benefits towards improving the performance of wireless networks. In view of practical scenarios, the channel state information cannot be perfect, and hence the channel estimation error, feedback/feed forward delay and co-channel interference do exist in the system. Therefore, aiming at improving the performance of such relaying protocols under the perfect and imperfect modelling, resource allocation problems are need to be investigated. In the wireless communications research group (WiCom), I am working towards these issues and looking to develop new algorithms for the performance improvement of such communication protocols. My research interests span the area of cooperative communication, relaying strategies over generalized fading channels, imperfect channels modelling, and optimization of relaying networks. I'm a student member of IEEE, and serving as a reviewer of IEEE Transactions on Vehicular Technology and KSII Transactions on Internet and Information Systems.
Pankaj K. Sharma (Graduated in Feb. 2017, Joined as a Postdoctoral Research Fellow, SungKyunKwan University (SKKU), Korea)
(Presently, working as an Assistant Professor at NIT Rourkela)
Research Area: Performance Analysis of Cooperative Cognitive Spectrum Sharing Systems over Fading Channels
Recently, there has been increasing interest in cognitive radio techniques which can allow dynamic spectrum sharing between primary (licensed) and secondary (unlicensed) systems. To achieve spectrum sharing, a cognitive node may adapt transmission modes and parameters so as to increase spectral efficiency without deteriorating the quality of service (QoS) of the primary network. Over a last couple of years, three different spectrum sharing paradigms are evolved viz. interweave, underlay and overlay. Besides cognitive radio, cooperative communication technology has also been intensively researched as it can potentially improve the throughput and coverage by harvesting spatial diversity. The integration of cooperative communication technologies into cognitive radio networks offers significant performance advantage for wireless communications. Motivated by these facts, in the current research activities of wireless communications research group (WiCom), I am contributing towards the development of the cognitive spectrum sharing coupled with cooperative communication protocols in multiuser scenario over a generalized fading channel model. Our main objectives are multifold viz., analysis of outage performance and achievable capacity, optimum transmit strategies, coverage and throughput enhancement.

Devendra S. Gurjar (Graduated in Oct. 2017, Joined as a Postdoctoral Research Fellow, University of Saskatchewan, Canada)

(Presently, working as an Assistant Professor at NIT Silchar)

Research Area: Performance Analysis of Two-Way Relaying with MIMO and D2D Communications

Wireless communication is the fastest growing area of the Communications Engineering, as it employs such attributes which were beyond to the imagination of humanity. We have seen four different generations of wireless communication system till now, having certain boon features with some impairment. Now a day’s, various challenges pertaining to the throughput, reliability, and spectrum scarcity under wireless environment are emerging to enable future applications. Over the past few years, MIMO technology has been developed as a promising technology for achieving high data rate, spatial diversity, spectral efficiency, etc.  However, combining such techniques with cooperative communication protocols can lead to a benevolent means for enhancing the performance of future generation of wireless systems. With this motivation, I am working at the WiCom group to explore the advantages of MIMO techniques in practical wireless relay systems, where channel impairments play a crucial role

Satish K. Tiwari (Graduated in Jan. 2019)
(National Post-Doctoral Fellow, IISc Bangalore)
Research Area: Estimation and Optimization of Design Parameters in Diffusive Molecular Nanonetworks 

Advancements in the field of nanotechnology require an efficient and reliable communication between nanomachines, especially for realization of applications such as targeted drug delivery, health and environment monitoring. The existing electromagnetic wireless communication may not be applicable at nanoscale due to issues such as antenna size, power consumption, computational complexity, and signal attenuation in fluidic environments. Molecular communication is a promising and attractive technique for nanoscale communications due to its biocompatibility (where chemical signals are used as information carriers). Currently, diffusion-based molecular communication (DMC) is the most simple and energy-efficient scheme for exchanging information among nanomachines. I am working towards the performance improvement of DMC system in realistic environments.

Sourabh Solanki (Graduated in July 2019, Joining as Postdoctoral Research Fellow, Korea University, South Korea)
(Research Associate at University of Luxembourg)
Research Area: Performance Analysis of Cognitive Relay Networks Using Spectral- and Energy-Efficient Schemes

In today’s world, we cannot imagine our life without information technology, and in the years to come, the demands and needs for this technology are expected to proliferate even more.  Such proliferation put forth the challenges for researchers to design the systems with high performance specifically concerning high-speed, full coverage and spectral efficiency.

 We, at wireless communications (WiCom) research lab, thrive for designing and modeling of such systems. My research interest encompasses the modern wireless technologies such as cognitive radio, cooperative communications, energy harvesting, physical layer security etc. which are of paramount importance for the future generation of cellular communication. Presently, I am working on the modeling of wireless systems which are primarily spectrum efficient and highly reliable. Essentially, we try to harvest the advantages of these technologies by integrating them together to design an effective system.  I am also working towards utilizing the available resources as efficiently as possible so as to reduce the cost of production for such wireless systems.
Vinay Bankey (Graduated in May 2020, Joined as Postdoctoral Research Fellow at Nanyang Technological University, Singapore)
Research Area: Performance Analysis of Hybrid Satellite-Terrestrial Networks over Generalized Fading Channels
My research interest is in the area of physical layer security of wireless communications system. Physical layer security has recently become an emerging technique to complement and significantly improve the communication security of wireless networks. Physical layer security is fundamentally different approach where secrecy is achieved by exploiting the properties of physical layer of the system, such as noise, time-varying nature of fading channels and interference. Because of such unexpected nature of fading channels, security of wireless communication network has been the subject of exploration.

 Vibhum Singh (Graduated in October 2021, Joining Postdoctoral Research Fellow Position at University of Luxembourg)
Research Area: Performance Analysis of Cognitive Hybrid Satellite-Terrestrial Networks for Futuristic Wireless Communications.

The explosion of mobile applications, wireless data traffic and their increasing integration in  various aspects of everyday life have increased the need of deploying modern wireless telecommunication system, that can handle such exponentially increasing traffic. The radio spectrum scarcity, seamless data connectivity and wide coverage are the most important characteristics to consider while deploying modern wireless systems. In this context, hybrid satellite terrestrial systems have been envisioned to enhance the radio spectrum utilization by enabling spectrum sharing between the satellite and terrestrial systems. 

Chandan K. Singh

Research Area: Performance Analysis of Next Generation Wireless Communication Systems

The global IP traffic in 2024 is expected to triple from 2020 levels, reaching around 600 exabytes (EB) per month.  It is due to using a high definition (HD) real-time video streaming, ultra-fast data download and teleconferencing. The drastically increase in the network traffic on a radio link has required a high speed and high capacity transmission link technology with unlined connectivity. Bandwidth scarcity in the microwave region has led to the standardization of new unlicensed bands in the millimeter-wave (mm-wave) range, particularly around the 60 GHz frequency and terahertz frequency (THz) range.  Due to the continuous growth of mobile devices and the rapid development of the Internet of things (IoT), the next wireless communication networks impose an explosive demand on low latency and massive connectivity over limited radio resources. Non-orthogonal multiple access (NOMA), which has shown the potential to improve spectral efficiency, balance user fairness, enlarge connections, and reduce access latency, has been envisioned as a promising technology for next-generation wireless communication. In contrast to the conventional orthogonal multiple access (OMA), NOMA simultaneously serves a multiple users with the same radio resource via superposition coding, where different users are distinguished with different power levels and the successive interference cancellation (SIC) is applied to cancel the multiuser interference.

I am working at the WiCom group to designing and modelling such systems. My research interest is in the area of next-generation wireless communication, Internet of things (IoT), NOMA technique, millimeter-wave, physical layer security, cognitive radio, cooperative relaying, and energy harvesting.



  1. Shivakumar S. Patil, “Sub-band Coding and Multirate Processing for Speech Signal Compression,” 2007 (Scientist-Cat ISRO, Bangalore).
  2. Sanjoy Paul, “Methodology for Enhancing VASs in Wireless Intelligent Networks,” 2012 (Telecom Officer at BSNL, Kolkata) .
  3. Shubham Chamadia, “Optimization for Power Allocation and Relay Location in Asymmetric Two-Way Relay Networks,” 2012 (Joined PhD program at University at Buffalo, New York).
  4. Shimpee Seema, “Performance of two-way relay networks in the presence of interference,” 2012 (Joined as Lecturer in IP University).
  5. Sourabh Solanki, “Performance Analysis of Cognitive Opportunistic Relaying Under Multiple Primary Users' Interference Constraints,” 2015 (Joined PhD program at IIT Indore).
  6. Aanchal Agarwal, “Bit Error Rate Analysis of Molecular Communication via Diffusion,” 2016 (Joined as PGET, Secure Meter, Udaipur).
  7. Devendra Magraiya, “Higher-Order Statistics for Cognitive Radio Systems,” 2016  (Joined as Junior Telecom Officer at BSNL, Raipur).
  8. Ashish Kumar Meshram, “Impact of Nodes-Mobility and Imperfect Channel Estimations on Two-Way Relay Systems,” 2016  ( Joined as Assistant Lecturer in NIT Surathkal, Karnataka).
  9. Anish Kumar Singh, “Secrecy Performance of Multiple Relay Systems with Direct Link over Nakagami-m Fading,” 2017 (Joined as Deputy Engineer at BEL, Ghaziabad).
  10. Ugrasen Singh, "Green Cooperative Communications," 2018 (Joined PhD program at IIT Delhi).
  11. Jagdale Mohit Chandrakant, "Image Processing Applications for Integrated Steel Plants," 2020 (Joined Tata Steel Limited).
  12. Ayush Dixit, "Optimizing Random Verification in Modem Sub-System using Machine Learning,"  Joint Supervisor (Qualcomm), 2021 (Granted PPO by Qualcomm).
  13. Kajal Yadav, "Secrecy Outage Analysis of Cognitive NOMA System with Control-Jamming," Ongoing. 
  14. Jonnalagadda Sharanya, "Spectrum Sharing and Energy Harvesting for IoT Networks," Ongoing.
  15. Ratnesh Kumar, "Physical Layer Secrecy Analysis in Energy Harvested Cooperative Relaying Networks," M. S. (Research), Ongoing.

  1. Aditya Nagori and Rohit Nitin Joshi, “Power Allocation in Wireless Bidirectional Relay Systems,” 2013.
  2. Chirag Bairwa and Siddharth Srivastava, “Scheduling Delay in Bidirectional Wireless Relay Communications,” 2013.
  3. Yugandhar Kamdi, Mukul Yadav, and Akhilesh Agnihotri, “Mathematical Modeling and Analysis of Scheduling Algorithms in LTE Systems,” 2014.
  4. Amit Prakash and Tushar Dudi, “Performance Evaluation of Cooperative Spectrum Sharing in Cognitive Radio,” 2014.
  5. Santosh Thota, “Performance Analysis of LTE Systems,” 2014.
  6.  Ronshee Chawla, “Traffic-Aware Cooperative Communications with Network Coding,” May 2015. Recipient of President of India Gold Medal in 2015 batch. [Joined as  Ph.D. Student at California Institute of Technology-Caltech].  
  7.  M. Mounika Reddy, “Cooperative Spectrum Sharing using Analog Network Coding,” May 2015. [Joined as Graduate Student at Georgia Institute of Technology, Atlanta].
  8. Putluri Kavya, “Online and Offline Matching of Relays with Cellular Users,” Dec. 2015, with Telecom ParisTech, France. [Joined as Graduate Student at University of California, San Diego].
  9. Ankitesh Kumar Singh, “Design of RFIC for Symbol Detection,” Dec. 2015, with Intel. [Joined as Graduate Student at University of California, San Diego].
  10. Gunjan Patil, “Performance Analysis and Optimization of Relay-Assisted Molecular Communication with Line Transmitter,” Dec. 2016. [Joined Graduate Student at University of California, San Diego].
  11. Jonaq Niveer Sarma, “Bidirectional Relaying Techniques in Diffusion Based Molecular Communication,” Dec. 2016. [Joined MS program at IIT Delhi, New Delhi].
  12. Tadi Ravi Teja Reddy, "Design and analysis of diffusion-based molecular communication systems," Dec. 2017. Received the award of 2017 Charpak Research Internship scholarship by French Government. [Joined MS program at University of California, Los Angeles].
  13.  Ashnil Vaitala and Dheeraj Kumar, "Resource Allocation and Network Planning for Green Communications," Dec. 2017. [Ashnil Vaitala has joined MBA program at IIM Lucknow].
  14. Aashish Bhole and Dhairya Punjabi, ''Energy Harvesting in Wireless Body Area Networks," Dec. 2018. [Aashish Bhole and Dhairya Punjabi have joined at GE India].
  15. Ampati Raja Vishwanath, "Performance of Molecular Communication Systems using Network Coding," Dec. 2018.
  16. Sreevatsank Kadaveru, "Improving Reliability of Multi-Cell MIMO Mission Critical Communication Systems using LDPC in 5G," Dec. 2019, with Telecom ParisTech, France.
  17. Ravi Shankar C.  and K. Sreejith, "Throughput Analysis for UAV-Enabled Energy Harvesting Relay System," Dec. 2019.
  18. Karan Kaushal and K. Chaitanya Sai, "Integrated Satellite-Aerial-Terrestrail Systems with UAV Relaying," May 2020.
  19. Shreyansh Thakur and Sarthak Chincholikar, "Time-Switching Cooperation with SWIPT in Wireless Body Area Networks," May 2020.
  20. Shivam Singh, "Performance Analysis of EH-based Coordinated Direct and Relay Transmission Network with NOMA: A Deep Learning Approach," May 2021.
  21. Dipesh, "Cognitive NOMA-Assisted IoT Network using SWIPT," May 2021.
  22. Muthoju Saketh, "Outage Performance Analysis of Downlink Integrated UAV-IRS Assisted NOMA Systems," May 2021.
  23. Boga Pawan, "Outage Performance of Cache-enabled UAV-NOMA Terrestrial Network using AF Relaying," May 2021.
  24. Eshaan Sachdeva and Lokesh Singla, "Cognitive Radio and Spectrum Sharing Techniques," Ongoing (2022).
  25. Lokinder Singh and Kartikeya Sen, "Molecular Communication Applications to Crop Sciences," Ongoing (2022).
  26. Chirag Kothari and Arijit Giri, "Cache-aided SWIPT Systems," Ongoing (2022).
 
PhD (IIT Delhi)
Professor
Electrical Engineering
IIT Indore, MP, India
Email: [email protected]
Phone: +91 732 4306 591
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M.Tech: ABV-IIITM Gwalior
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