Email: prabhu@chandhar-labs.com
            prabhu@basigwireless.com

 

Research Experience

• Director, Basig Wireless Laboratories Private Limited, Mayiladuthurai, Tamil Nadu, India (Jan 2024 -- Present)
• Director, Chandhar Research Labs Private Limited, Chennai, Tamil Nadu, India (Jan 2018 -- Present)
• Postdoctoral Researcher, Division of Communication Systems, Linköping University, Sweden (Nov. 2015 -- Oct. 2017)
  Supervisor: Prof. Erik G. Larsson
• PhD, Wireless Communications, G. S. Sanyal School of Telecommunications (GSSST), Indian Institute of Technology Kharagpur (IIT KGP) (Aug. 2010 -- May 2015)
  Supervisor: Dr. Suvra Sekhar Das
• Senior Research Fellow, Vodafone IIT Center for Telecommunications (VICET), Indian Institute of Technology Kharagpur (Aug. 2009 -- July 2010)

Products Developed 

• 5-Nines Radio - 5G Testbed
• Deep Radio - Deep Learning Testbed for Wireless
• Wi-Guy - SDR based platform for learning Wireless fundamentals
• Loiter -  5G Enabled Drone
  
  

Publications

Google Scholar Profile

Blog Posts:

• Massive MIMO, Drone Swarms, and Some Cool Stuff

Journal Publications:

• Elakkiya, T.; Gauni, S.; Chandhar, P., "Spectrum occupancy prediction using LSTM models for cognitive radio applications," Network: Computation in Neural Systems, pp. 1-32, September 2024. 
• Elakkiya, T.; Gauni, S.; Chandhar, P., "Transfer Learning Based Location-Aided Modulation Classification in Indoor Environments for Cognitive Radio Applications," Radioengineering Journal, vol.32, no.4, pp. 531-541, October 2023.
• Elakkiya, T.; Gauni, S.; Chandhar, P., "Modulation classification analysis of CNN model for wireless communication systems," AIMS Electronics and Electrical Engineering, vol.7, no.4, pp. 337-353, October 2023.
• Hariprasad, S.; Deepa. T.; Chandhar, P., "SENMQTT-SET:An Intelligent Intrusion Detection in IoT-MQTT Networks Using Ensemble Multi Cascade Features," IEEE Access, vol. 10, pp. 33095 - 33110, March 2022.
• Chandhar, P.; Larsson, E.G., "Massive MIMO for Drone Communications: Applications, Case Studies and Future Directions," IEEE Access, vol. 7, pp. 94676-94691, 2019.
• Chandhar, P.; Danev, D.; Larsson, E.G., "Massive MIMO for Communications with Drone Swarms," IEEE Transactions on Wireless Communications, vol.17, no.3, pp.1604-1629, March 2018. 
• Chandhar, P.; Das, S.S., "Multi-Objective Framework for Dynamic Optimization of OFDMA Cellular Systems," IEEE Access, vol. 4, pp. 1889-1914, May 2016. (Download Presentation)
• Chandhar, P.; Das, S.S., "Area Spectral Efficiency of Co-Channel Deployed OFDMA Femtocell Networks," IEEE Transactions on Wireless Communications, vol.13, no.7, pp.3524-3538, July 2014. 

Conference Publications:

• Chennamsetty, S.; Boddu, S.; Chandhar, P.; Bulusu, S.S.K.C., "Analysis of PAPR in OTFS Modulation with Classical Selected Mapping Technique," International Conference on Communication Systems and Networks (COMSNETS'23), 03-08 Jan. 2023.
• Chandhar, P.; Elakkiya, T.; Babu, S.; Krishnakumar, V.; Sivakumar, A.; Vignesh, G.; Viswanathan, W., "4G Spectrum Occupancy Analysis in Chennai-India," International Conference on Emerging Techniques in Computational Intelligence (ICETCI'22), 25-27 Aug. 2022.
• Elakkiya, T.; Chandhar, P., "Experimental Analysis of Deep Learning-based Modulation Classification in Indoor Environments," IEEE India Council International Conference (INDICON'22), 19-21 Dec.  2022.
• Chandhar, P.;  Babu, S.; Elakkiya, T., "Teaching and Learning the Principles of Wireless Communication Through Smartphone and CRFO," International Conference on Emerging Techniques in Computational Intelligence (ICETCI'21), 25-27 Aug. 2021.
• Elakkiya, T.; Chandhar, P.; Gauni, S., "Comparison of Deep Architectures for Indoor RF Signal Classification," International Conference on Emerging Techniques in Computational Intelligence (ICETCI-2021), 25-27 Aug. 2021.
• Chandhar, P.; Pai, V.U., "On Collaborative Radio Frequency Observatory in India," IEEE International Conference on Advanced Networks and Telecommunications Systems (ANTS'20), pp.1-6, 14-17 Dec. 2020.
• Chandhar, P.; Danev, D.; Larsson, E.G., "On the Zero-Forcing Receiver Performance for Massive MIMO Drone Communications," (Invited paper) 19th IEEE International workshop on Signal Processing advances in Wireless Communications (SPAWC'18), pp.1-5, 25-28 June 2018. (Download Poster)
• Chandhar, P.; Danev, D.; Larsson, E.G., "On the Outage Capacity in Massive MIMO with Line-of-Sight," 18th IEEE International workshop on Signal Processing advances in Wireless Communications (SPAWC'17), pp.1-6, 3-6 July 2017. (Download Poster)
• Chandhar, P.; Danev, D.; Larsson, E.G., "On Ergodic Rates and Optimal Array Geometry in Line-of-Sight Massive MIMO," 17th IEEE International workshop on Signal Processing advances in Wireless Communications (SPAWC'16), pp.1-6, 3-6 July 2016. (Download Poster)
• Chandhar, P.; Danev, D.; Larsson, E.G., "Massive MIMO as Enabler for Communications with Drone Swarms," International Conference on Unmanned Aircraft Systems (ICUAS'16), pp.347-354, 7-10 June 2016. (Download Presentation)
• Chandhar, P.; Das, S.S., "Energy Saving in OFDMA Cellular Networks with Multi-Objective Optimization," IEEE International Conference on Communications (ICC), 2014, pp.3951-3956, 10-14 June 2014. (Download Presentation)
• Chandhar, P.; Ghosh, P.; Das, S.S., "Performance Analysis of Co-Channel Deployment of Femtocells with Power Control in 4G Networks," National Conference on Communications (NCC), 2014, pp.1-6, Feb. 28 - Mar. 2 2014. (Download Presentation)
• Chandhar, P.; Das, S.S., "Area Energy Efficiency Analysis for OFDMA Femtocell Networks," International Symposium on Wireless Communications Systems (ISWCS), 2014, pp.771-775, 26-29 Aug. 2014. (Download Presentation)
• Chandhar, P.; Das, S.S., "Cell Load Coupling Framework for Load Balancing and ICI Coordination in OFDMA Cellular Networks," IEEE Vehicular Technology Conference (VTC Spring), 2014, pp.1-5, 18-21 May 2014. (Download Presentation)
• Chandhar, P.; Das, S.S., "Adaptive Downlink Power Control for Co-Channel Femtocells in OFDMA Cellular Networks," IEEE Vehicular Technology Conference (VTC Spring), 2014, pp.1-5, 18-21 May 2014. (Download Presentation)
• Boddu, S.R.; Mukhopadhyay, A.; Chandhar, P.; Philip, B.V.; Das, S.S., "Analysis of Fractional Frequency Reuse in OFDMA Networks for Real Time and Best Effort Traffic ," IEEE International Conference on Communications (ICC), 2013, pp.5366-5370, 9-13 June 2013.
• Chandhar, P.; Das, S.S., "Analysis of Area Spectral Efficiency for Co-Channel Deployed Macrocell-Femtocell OFDMA Networks," IEEE International Conference on Communications (ICC), 2013, pp.5010-5014, 9-13 June 2013. (Download Presentation)
• Chandhar, P.; Das, S.S., "Analytical Evaluation of Offloading Gain in Macrocell-Femtocell OFDMA Networks," IEEE Vehicular Technology Conference (VTC Spring), 2013, pp.1-6, 2-5 June 2013. (Download Presentation)
• Das, S.S.; Agrawal, P.; Chandhar, P., "Energy Saving in OFDMA Networks through Base Station Sleep Mode Using Genetic Algorithm," IEEE Vehicular Technology Conference (VTC Spring), 2013, pp.1-5, 2-5 June 2013. (Download Presentation)
• Das, S.S.; Ghosh, P.; Chandhar, P., "Estimation of Effective Radio Resource Usage for VoIP Scheduling in OFDMA Cellular Networks," IEEE Vehicular Technology Conference (VTC Spring), 2012, pp.1-6, 6-9 May 2012. (Download Presentation)
• Ghosh, P.; Das, S.S.; Naravaram, S.; Chandhar, P., "Energy Saving in OFDMA Cellular Systems using Base-Station Sleep Mode: 3GPP-LTE a Case Study," National Conference on Communications (NCC), 2012, pp.1-5, 3-5 Feb. 2012.
• Ghosh, P.; Das, S.S.; Chandhar, P., "VoIP Scheduling with Reduced Overhead and Radio Resource Usage Estimation-Effect on Best Effort Capacity," National Conference on Communications (NCC), 2012, pp.1-5, 3-5 Feb. 2012.
• Das, S.S.; Chandhar, P.; Mitra, S.; Ghosh, P., "Issues in Femtocell Deployments in Broadband OFDMA Networks: 3GPP-LTE a Case Study," IEEE Vehicular Technology Conference (VTC Fall), 2011, pp.1-5, 5-8 Sept. 2011. (Download Presentation)
• Chandhar, P.; Pushpalatha V.; Meenakshi M., "Phase Noise Compensation in OFDM System Over Fading Channels,'' National Conference on Signal Processing, Communications and Networking (NCSCN), pp.1-3, 30-31 Mar. 2009.

Supervision of Master Thesis:

• Nsengiyumva, Valens, "Is the Cyclic Prefix Needed in Massive MIMO?,'' Department of Electrical Engineering, Linköping University.

Patents:

• Das, S.S.; Ghosh, P.; Chandhar, P.; Palit, B., "A Method for Ensuring High VoIP Capacity in LTE,'' Indian Patent, Reference Number: 618/KOL/2013.

Talks

• "5G Technologies for Industry 4.0," Industrial Lecture, EGS Pillai College of Engineering, Nagapattinam, Tamil Nadu, 27 July 2024.  
• "Applications of AI and ML in Wireless Communication and Sensor Networks," ATAL Five Day Faculty Development Programme on “Millimeter wave Communication and Key enable technologies -5G/6G”, NSS College of Engineering, Palakkad, Kerala, 15 February 2024.
  
• "Machine learning and deep learning approaches for 5G & IoT and Practical session on 5G Use cases," ATAL Five Day Faculty Development Programme on “Applications of Internet of Things Networks in 5G and Beyond”, Rajalakshmi Engineering College, Thandalam, Chennai, Tamil Nadu, 12 December 2023.
• "5G Technologies for Industry 4.0," ATAL Five Day Faculty Development Programme on “Design thinking and Prototyping for Industry 4.0”, Shri Vishnu Engineering College for Women, Bhimavaram, Andhra Pradesh, India, 25 November 2023.
• "5G Enabled Drones: Use Cases and Applications," A 3 Day Online Drone Boot Camp, Dhanekula Institute of Engineering and Technology, Vijayawada, Andhra Pradesh, India, 27 October 2023.
• "Deep Learning based RF Signal Classification: Hands-on," Second International conference on Machine Learning Deep Learning Computational intelligence for wireless communication, National Institute of Technology Tiruchirappalli, Tamil Nadu, India, 23 June 2023.
• "Realizing Your Own Private 5G Network: A Hands-on," SERB Funded KARYASHALA Workshop on Modelling of Energy Efficient Waveforms and Systems for B5G Communications", National Institute of Technology Tiruchirappalli, Tamil Nadu, India, 8 July 2023.
• "Deep learning-based RF signal classification in 5G and Beyond Communications: Hands-on," SERB Funded KARYASHALA Workshop on Application of Machine Learning in B5G Wireless Communications, National Institute of Technology Tiruchirappalli, Tamil Nadu, India, 21 December 2022.
• "5G Enabled Communication System Design for Autonomous Vehicles and Drones," SERB Funded KARYASHALA Workshop on Vehicular Communications for Next-Generation Intelligent Transportation Systems, IIT Indore, Madhya Pradesh, India, 18 July 2022.
• "Machine Learning based Intrusion Detection in IoT-MQTT Networks," Faculty Development Programme (FDP) on Applications of AI in Wireless Communication and Sensor Networks, NIT Warangal, Telangana, 11 May 2022.
• "Statistical Modelling and Experimental Verification of 4G/5G Cellular Systems using a Real-Time Testbed," Short-Term Course (STC) on Statistical Modelling and Analysis of Advanced Wireless Communication Systems, IIT Indore, Madhya Pradesh, 23 March 2022.
• "Massive MIMO enabled Communication System Design for Drone Swarms," Faculty Development Program (FDP) on Applications of Deep Learning Techniques to 5G Wireless Communication Technologies, Vel Tech Rangarajan Dr Sagunthala R&D Institute of Science and Technology, Chennai, Tamil Nadu, 11 February 2022.
• "Hands-On Training on Deep Learning based RF Signal Classification for Cognitive Green Communications," AICTE approved Online Short Term Training Program (STTP) on Green Communication, BMSIT&M, Bengaluru, Karnataka, 27 August 2021.
  
  
• "Understanding the concepts of 4G/5G systems using Smartphone and CRFO: A Hands-on Training," Value Added Course On Latest Trends in 5G and Applications, HKBK College of Engineering, Bengaluru, Karnataka, 14 August 2021.
  
  
• "Hands-on Training on Deep Learning-based Channel Estimation and Signal Detection in OFDM Systems," Online Short Term Training Program (STTP) on IoT - 5G and Beyond with Deep Learning: Demonstrations and Hands-on Training, Mahindra University, Hyderabad, Telangana , 11 July 2021.
  
  
• "Understanding the concepts of 4G/5G systems using Smartphone and CRFO," Online Short Term Training Program (STTP) on IoT - 5G and Beyond with Deep Learning: Demonstrations and Hands-on Training, Mahindra University, Hyderabad, Telangana , 09 July 2021.
  
  
• "Hands-on Training on Deep Learning based RF Signal Classification for Dynamic Spectrum Access Applications," Online Short Term Training Program (STTP) on IoT - 5G and Beyond with Deep Learning: Demonstrations and Hands-on Training, Mahindra University, Hyderabad, Telangana , 08 July 2021.
  
  
• "Hands-On Training on 4G/5G Mobile Radio Propagation (Pathloss, Shadow Fading and Small Scale Fading) through Smartphone and CRFO," AICTE approved Online Short Term Training Program (STTP) on AI-MIMO: Millimeter (mm) Wave and Massive MIMO Applications for 5G wireless Networks using AI, GRIET, Hyderabad, Telangana , 29 April 2021.
  
  
• "Hands-On Training on Deep Learning based RF Signal Classification (using Kaggle and Python Programming)," AICTE approved Online Short Term Training Program (STTP) on AI-MIMO: Millimeter (mm) Wave and Massive MIMO Applications for 5G wireless Networks using AI, GRIET, Hyderabad, Telangana , 28 April 2021.
  
  
• "Cellular Ecosystem: 5G and Beyond," Industrial Lecture, NIT Tiruchirappalli, Tamil Nadu, India, 10 April 2021.
  
  
• "5G Cellular and Drone Communication Systems," Guest Lecture, MAM College of Engineering and Technology, Tiruchirappalli, Tamil Nadu, India, 13 March 2021.
  
  
• "5G and Beyond Wireless Ecosystem," Guest Lecture, SSN College of Engineering, Chennai, Tamil Nadu, India, 02 March 2021.
  
  
• "Massive MIMO enabled Communication System Design for Drone Swarms: Case studies and Future Directions," TEQIP III funded Workshop: Disruptive Wireless Communication Paradigms: The Road Towards 6G (DWCP-6G), Indian Institute of Information Technology Guwahati (IIITG), Guwahati , 07 February 2021.

• "Real-Time 5G Emulation and its Future Perspective," AICTE Training & Learning (ATAL) Academy Online Faculty Development Programme: 5G- Green Communication & Network Deployment in Smart Cities, Acharya Institute of Technology, Bangalore, 19 January 2021.

• "5-Nines Radio: Realizing Your Own End-to-End 4G/5G Cellular Network," TEQIP III funded Short Term Course (STC):5G and Beyond Wireless Technologies: Modelling and Simulations using MATLAB, IIT Indore, 26 December 2020.

• "Demonstration of 5-Nines Radio: A 4G/5G Testbed," AICTE Training & Learning (ATAL) Academy Online Faculty Development Programme: 5G LTE Wireless Communication systems for NB-IOT: MIMO, Massive MIMO Systems, Cooperative Communication and IoT, LENDI Institute of Engineering and Technology, Viziayanagaram, 10 December 2020.

• "Introduction to 5G New Radio," AICTE Training & Learning (ATAL) Academy Online Faculty Development Programme: 5G LTE Wireless Communication systems for NB-IoT: MIMO, Massive MIMO Systems, Cooperative Communication and IoT, LENDI Institute of Engineering and Technology, Viziayanagaram, 10 December 2020.

• "Overview of 5G Access and Core Networks," AICTE Sponsored National Level Short Term Training Programme: Energy Efficient Techniques for 5G Wireless Communications, PICT, Pune, Maharashtra, India, 7 December 2020.
  
  
• "Demonstration of 5G Waveforms and Channel Coding using Deep Radio," AICTE Training & Learning (ATAL) Academy Online Faculty Development Programme: Towards 5G Communications & Beyond with IoT, Machine Learning, Goa College of Engineering, Goa, India, 27 November 2020.

• "Demonstration of 5-Nines Radio: A 4G/5G Testbed," AICTE Training & Learning (ATAL) Academy Online Faculty Development Programme: Towards 5G Communications & Beyond with IoT, Machine Learning, Goa College of Engineering, Goa, India, 24 November 2020.

• "Introduction to 5G Access Network," AICTE Training & Learning (ATAL) Academy Online Faculty Development Programme: Towards 5G Communications & Beyond with IoT, Machine Learning, Goa College of Engineering, Goa, India, 23 November 2020.
  
  
• "5G and Beyond," Short Term Training Program on 5G Mobile Communication Networks, BIT Mesra, Ranchi, Jharkhand, India, 10 December 2019.

• "5G and Beyond," Guest Lecture, NIT Tiruchirappalli, Tamil Nadu, India, 15 November 2019.
  
  
• "Wi-Guy: WIreless GUide for You," Product Demo, Malineni Perumallu Educational Society's Group Of Institutions, Guntur, Andhra Pradesh, India, August 2019.
  
  
• Wi-Guy: WIreless GUide for You," Product Demo, St. Ann's College of Engineering and Technology, Andhra Pradesh, India, August 2019.
  
  
• "Wi-Guy: WIreless GUide for You," Product Demo, Vasireddy Venkatadri Institute of Technology, Guntur, Andhra Pradesh, India, August 2019.
  
  
• "Massive MIMO for Drone Communications," Sino-Swedish Workshop on Techniques for 5G Communications, Linköping University, Sweden, 28 June 2017.

Tutorials

• "Deep Learning based Radio Frequency Signal Classification: Hands-On," International Conference on Communication Systems and Networks, COMSNETS 2023, Bengaluru, India, Karnataka, India, 03 January 2023.
  
  
• "Application of Deep Learning in 5G and Beyond Communications - Hands On," International Conference on Emerging Techniques in Computational Intelligence, ICETCI 2022, Mahindra University, Hyderabad, Telangana, India, 25 August 2022.
  
  

Workshops

• "Sustainable IoT Usecases with 5G," Velllore Institute of Technology, Vellore, Tamil Nadu, India, 1 October 2024.
  
  
• "Wireless Communications: 5G and Beyond," Probe 2021, The Annual ECE Symposium of NIT Trichy, Organized in collaboration with ECE Association, National Institute of Technology Tiruchirappalli, Tamil Nadu, India, 13-14 March 2021.
  
  
• "Wireless Communications: 5G and Beyond," AICTE Training & Learning (ATAL) Academy Online Faculty Development Programme: Towards 5G Communications & Beyond with IoT, Machine Learning, Organized in collaboration with Goa College of Engineering, Goa, India, 27 November 2020. 

Professional Activities

• Member: IEEE, IEEE Signal Processing Society
• TPC Member: IEEE Globecom 2017, IEEE VTC Fall 2018
• Session Chair: ICUAS 2016
• Reviewer:
• Journals: IEEE Transactions on Wireless Communications, IEEE Transactions on Communications, IEEE Transactions on Vehicular Technology, IEEE Transactions on Mobile Computing, IEEE Wireless Communications Letters, IEEE Communications Letters, IET Communications, IEEE Wireless Communications Magazine, IEEE Access, Elsevier Aerospace Science and Technology, Vehicular Communications, Aerospace Science and Technology, Sensors
• Conferences: IEEE ICC, IEEE Globecom, IEEE WCNC, IEEE VTC, NCC

Teaching

• Teaching assistant in the following course, Linköping University, Sweden (2016 & 2017):
• Modern Channel Coding, Inference and Learning