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Research Areas, Publications, and Projects

Research Areas

Our Future Generation Communication Systems Research Lab mainly works in the following areas but not limited to​

  1. 5G and 6G Wireless Systems (Physical Layer)

  2. Space-Air-Ground Integrated Networks (SAGIN)

  3. Hybrid FSO/RF Communication

  4. Terahertz Communication

  5. Aerial Platforms (UAV/HAPS)-based FSO Communication

  6. Intelligent Reflecting Surfaces-based FSO/RF/THz Communications 

  7. Blind Modulation/Code/Interleaver Classification using Conventional and DL/ML Techniques 

Journal Publications

  1. Swaminathan R, M. D. Selvaraj, and R. Roy, ``Exact error analysis of MPAM signaling for a cooperative diversity system with correlated links using paired error approach,'' IEEE Communications Letters, vol. 18, no. 2, pp. 273-276, Feb. 2014.

  2. M. D. Selvaraj* and Swaminathan R*, ``Performance of hybrid selection and switch-and-stay combining with decode-and-forward relaying,'' (* Equal contributions) IEEE Communications Letters, vol. 18, no. 12, pp. 2233-2236, Dec. 2014.

  3. Swaminathan R, M. D. Selvaraj, and R. Roy, ``On the error and outage performance of decode-and-forward cooperative selection diversity system with correlated links,'' IEEE Transactions on Vehicular Technology, vol. 64, no. 8, pp. 3578-3593, Aug. 2015.

  4. Swaminathan R, R. Roy, and M. D. Selvaraj, ``Performance comparison of selection combining with full CSI and switch-and-examine combining with and without post-selection,'' IEEE Transactions on Vehicular Technology, vol. 65, no. 5, pp. 3217-3230, May 2016.

  5. Swaminathan R, G. K. Karagiannidis, and R. Roy, ``Joint antenna and relay selection strategies for decode-and-forward relay networks,'' IEEE Transactions on Vehicular Technology, vol. 65, no. 11, pp. 9041-9056, Nov. 2016.

  6. Swaminathan R and R. Roy, ``HSSEC strategy for decode-and-forward-relaying systems over Nakagami-m fading channels,'' IET Communications, vol. 10, no. 18, pp. 2621-2635, Dec. 2016.

  7. Swaminathan R, A. S. Madhukumar, N. W. Teck, and S. C. M. Samson, ``Parameter estimation of block and helical scan interleavers in the presence of bit errors,'' Elsevier Digital Signal Processing, vol. 60, pp. 20-32, Jan. 2017.

  8. Swaminathan R, A. S. Madhukumar, N. W. Teck, and S. C. M. Samson, ``Parameter estimation of convolutional and helical interleavers in a noisy environment,'' IEEE Access, vol. 5, pp. 6151-6167, 2017.

  9. Swaminathan R and A. S. Madhukumar, ``Classification of error correction codes and estimation of interleaver parameters in a robust environment,'' IEEE Transactions on Broadcasting, vol. 63, no. 3, pp. 463-478, Sept. 2017.

  10. Swaminathan R, A. S. Madhukumar, W. Guohua, and T. S. Kee, ``Blind reconstruction of Reed-Solomon encoder and interleavers over noisy environment,'' IEEE Transactions on Broadcasting, vol. 64, no. 4, pp. 830-845, Dec. 2018.

  11. Swaminathan R, A. S. Madhukumar, W. Guohua, and T. S. Kee, ``Blind recognition of LDPC code parameters over erroneous channel conditions,'' IET Signal Processing, vol. 13, no. 1, pp. 86-95, Feb. 2019.

  12. S. Sharma, A. S. Madhukumar, and Swaminathan R, ``Switching-based cooperative decode-and-forward
    relaying for hybrid FSO/RF networks,'' IEEE/OSA Journal of Optical Communications and Networking, vol. 11, no. 6, pp. 267-281, June 2019.

  13. S. Sharma, A. S. Madhukumar, and Swaminathan R, ``Effect of pointing errors on the performance of hybrid FSO/RF networks,'' IEEE Access, vol. 7, pp. 131418-131434, 2019.

  14. Swaminathan R and A. S. Madhukumar, ``Blind parameter estimation of turbo convolutional codes: noisy and non-synchronized scenario,'' Elsevier Digital Signal Processing, vol. 95, Article 102577, Dec. 2019.

  15. Swaminathan R, A. S. Madhukumar, and W. Guohua, ``Blind estimation of code parameters for product codes over noisy channel conditions,'' IEEE Transactions on Aerospace and Electronic Systems, vol. 56, no. 2, pp. 1460-1473, April 2020.

  16. S. Sharma, A. S. Madhukumar, and Swaminathan R, ``Performance optimization for dual-hop hybrid FSO/RF system with selection combining,'' IET Optoelectronics, vol. 14, no. 6, pp. 422-433, Dec. 2020. 

  17. M. Siddharth, S. Shah, N. Vishwakarma, and Swaminathan R, ``Performance analysis of adaptive combining based hybrid FSO/RF terrestrial communication,'' IET Communications, vol. 14, no. 12, pp. 4057-4068, Dec. 2020.

  18. N. Vishwakarma and Swaminathan R, ``Performance analysis of hybrid FSO/RF communication over generalized fading models '', Elsevier Optics Communications, vol. 487, pp. 1-18, May 2021.

  19. Swaminathan R, S. Sharma, N. Vishwakarma, and AS. Madhukumar, ``HAPS-based relaying for integrated space-air-ground networks with hybrid FSO/RF communication : A performance analysis", IEEE Transactions on Aerospace and Electronic Systems, vol. 57, no. 3, pp. 1581-1599, June 2021.

  20. S. Shah, M. Siddharth, N. Vishwakarma, Swaminathan R, and A. S. Madhukumar, ``Adaptive-combining-based hybrid FSO/RF satellite communication with and without HAPS,'' IEEE Access, vol. 9, pp. 81492-81511, 2021.

  21. S. Sharma, A. S. Madhukumar and Swaminathan R, ``MIMO hybrid FSO/RF system over generalized fading channels,'' IEEE Transactions on Vehicular Technology, vol. 70, no. 11, pp. 11565-11581, Nov. 2021.

  22. N. Vishwakarma and Swaminathan R, ``On the capacity performance of hybrid FSO/RF system with adaptive combining over generalized distributions,'' IEEE Photonics Journal, vol. 14, no. 1, pp. 1-12, Feb. 2022.

  23. N. Vishwakarma and Swaminathan R, ``On the maximal-ratio combining of FSO and RF links over generalized distributions and its applications in hybrid FSO/RF systems,'' Elsevier Optics Communications, vol. 520, pp. 1-17, Oct. 2022

  24. G. Kumar, P. Date, R. B. Pachori, R. Swaminathan and A. K. Singh, ``Wrapped Particle Filtering for Angular Data,'' IEEE Access, vol. 10, pp. 90287-90298, 2022.

  25. Deepshikha Singh and Swaminathan R, ``Comprehensive performance analysis of hovering UAV-based FSO communication system," IEEE Photonics Journal, vol. 14, no. 5, pp. 1-13, Oct. 2022

  26. Deepshikha Singh and Swaminathan R, ``Comprehensive performance analysis of Hybrid FSO/RF space-air-ground integrated network," Elsevier Optics Communications, vol. 527, pp. 1-14, Jan 2023. 

  27. G. Kumar, Y. Venu Gopal, Swaminathan R, and A. K. Singh, ``Fractionally delayed Bayesian approximation filtering under non-Gaussian noisy environment," IEEE Transactions on Aerospace and Electronic Systems, DOI: 10.1109/TAES.2023.3266176, April 2023.

  28. G. Kumar, Amit Naik, R. B. Pachori, Swaminathan R, and A. K. Singh, ``Improved Gaussian filtering for handling  concurrent  delayed and missing measurements," Asian Journal of Control (Wiley), DOI: doi.org/10.1002/asjc.3126, May 2023.

  29. S. Uniyal, N. Vishwakarma, and Swaminathan R, “Multihop IRS-assisted free space optics communication with DF relaying: A performance analysis,” OPTICA (OSA) Applied Optics, vol. 62, no. 18, pp. 4716-4726, June 2023.

  30. V. Bankey, S. Sharma, Swaminathan R, and A. S. Madhukumar, ``Physical layer security of HAPS-based space-air-ground integrated network with hybrid FSO/RF communication,'' IEEE Transactions on Aerospace and Electronic Systems, vol. 59, no. 4, pp. 4680-4688, Aug. 2023. 

  31. N. Vishwakarma, Swaminathan R, P. D. Diamantoulakis, and G. Karagiannidis, “Performance analysis of optical reflecting surface-assisted optical space shift keying-based MIMO-FSO system,” IEEE Transactions on Communications, vol. 71, no. 8, pp. 4751-4763, Aug. 2023.

  32. Smriti Uniyal, Narendra Vishwakarma, Swaminathan R, and A. S. Madhukumar,  "Intelligent-reflecting-surfaces-assisted hybrid FSO/RF communication with diversity combining: A performance analysis,"  OPTICA (OSA) Applied Optics,  vol. 62, no. 35, pp. 9399-9413, Dec. 2023.

Conference Publications/Book Chapter

  1. R. Swaminathan and T. Laxmikandan, ``Study of physical layer simulation of Wimax systems", in proc. 2011 National conference on recent trends in communication, computation and signal processing (RTCSP), Amrita University Coimbatore, pp. 126-130. 

  2. Swaminathan R, M. D. Selvaraj, and R. Roy, ``Performance analysis of double correlated selection combining for cooperative diversity systems'', in proc. 2013 IEEE National conference on communications (NCC), IIT Delhi, New Delhi, pp. 1-5.

  3. Swaminathan R, M. D. Selvaraj, and R. Roy, ``Error Analysis of NC-BFSK for cooperative diversity with correlated links'', in proc. 2013 Fourth nordic workshop on system and network optimization for wireless (SNOW), Yllas, Finland.

  4. Swaminathan R, R. Roy, and M. D. Selvaraj, ``Performance analysis of triple correlated selection combining for cooperative diversity systems'', in proc. 2013 IEEE International conference on communications (ICC), Budapest, Hungary, pp. 5483-5388.

  5. M. Vinod Kumar, Swaminathan R, and R. Roy, ``Green cooperative communication techniques for intelligent transportation systems'', in proc. 2013 IEEE International conference on signal processing, computing, and control (ISPCC), Waknaghat, India, pp. 1-5.

  6. Swaminathan R and A. S. Madhukumar, ``Joint recognition of error correcting codes and interleaver parameters in a robust environment'', in proc. 2016 IEEE International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC), Valencia, Spain, pp. 1-6.

  7. Swaminathan R, A. S. Madhukumar, W. Guohua, and T. S. Kee, ``Parameter identication of Reed-Solomon codes over noisy environment'', in proc. 2017 IEEE Vehicular Technology Conference (VTC) Fall, Toronto, Canada, pp. 1-5.

  8. S. Sharma, A. S. Madhukumar, Swaminathan R, and C. J. Sheng,  ``Performance analysis of hybrid FSO/RF transmission for DF relaying system'', in proc. 2017 IEEE Global Communication Conference (GLOBECOM) Workshops, Singapore, pp. 1-6.

  9. S. Sharma, A. S. Madhukumar, and Swaminathan R, ``Switching-based hybrid FSO/RF transmission for DF relaying system'', in proc. 2018 IEEE Wireless Communications and Networking Conference (WCNC), Barcelona, Spain, pp. 1-6.

  10. Swaminathan R, A. S. Madhukumar, W. Guohua, and T. S. Kee, ``Joint reconstruction of Reed-Solomon encoder and convolutional interleaver in a noisy environment'', in proc. 2018 IEEE International Symposium on Information Theory and its Applications (ISITA), Singapore, pp. 715-719.

  11. Swaminathan R and A. S. Madhukumar, ``Code parameter estimation from noisy data: TPC", in proc. 2018 ISITA, Singapore, pp. 491.

  12. S. Sharma, A. S. Madhukumar, and Swaminathan R, ``Capacity analysis for hybrid FSO/RF networks", in proc. 2018 ISITA, Singapore, pp. 501.

  13. S. Sharma, J. Tan, A. S. Madhukumar, and Swaminathan R, ``Switching-based transmit antenna/aperture selection in a MISO hybrid FSO/RF system'', in proc. 2018 IEEE GLOBECOM, Abu Dhabi, UAE, pp. 1-6.

  14. S. Sharma, A. S. Madhukumar, and Swaminathan R, ``Asymptotic analysis of switching-based hybrid FSO/RF system with DF relaying'', in proc. 2019 IEEE Asia-Pacific Conference on Communications, Ho Chi Minh city, Vietnam,  pp. 425-430.  

  15. M. Siddharth, S. Suyash, and Swaminathan R, ``Outage analysis of adaptive combining scheme for hybrid FSO/RF communication'',  in proc. 2020 IEEE NCC, IIT Kharagpur, India, pp. 1-6

  16. S. Sharma, A. S. Madhukumar, and Swaminathan R, ``Performance of dual-hop hybrid FSO/RF system with pointing errors optimization'', in proc. 2020 IEEE VTC Spring, Antwerp, Belgium, pp. 1-5.

  17. Swaminathan R, S. Sharma, A. S. Madhukumar, ``Performance analysis of HAPS-based relaying for hybrid FSO/RF downlink satellite communication'', in proc. 2020 IEEE VTC Spring, Antwerp, Belgium, pp. 1-5.

  18. S. Sharma, A. S. Madhukumar, and Swaminathan R, ``Performance of hybrid FSO/RF system with transmit aperture selection'', in proc. 2020 IEEE ICC Workshops, Dublin, Ireland, pp. 1-6.

  19. S. Sharma, A. S. Madhukumar, and Swaminathan R,``Space shift keying-based hybrid FSO/RF system'', in proc. 2020 IEEE VTC Fall, Victoria, pp. 1-5.

  20. N. Vishwakarma and Swaminathan R, ``On the performance of hybrid FSO/RF system over generalized fading channels'', in proc. 2020 IEEE Advanced Networks and Telecommunication Systems (ANTS), IIIT Delhi, pp. 1-6.

  21. N. Vishwakarma and Swaminathan R, ``Capacity analysis of adaptive combining for hybrid FSO/RF satellite communication system,'' in proc. 2021 IEEE NCC, IIT Kanpur, 2021, pp. 1-6.

  22. Deepshikha Singh and Swaminathan R, ``On the performance of hybrid FSO/RF system over generalized fading channels'', in proc. 2021 IEEE ANTS, IDRBT Hyderabad, pp. 1-6.

  23. K. S. G. Kiran and Swaminathan R, ``Performance analysis of DF-relaying-based cooperative NOMA System with partial relay selection,'' in proc. 2022 IEEE International Conference on Communication Systems and Networks (COMSNETS), Bengaluru, pp. 574-580.

  24. A. Dinesh and Swaminathan R, ``Codeword length estimation of LDPC codes with limited data,'' in proc. 2022 IEEE COMSNETS, Bengaluru, pp. 270-274.

  25. K. S. G. Kiran and Swaminathan R, ``Performance analysis of SWIPT-enabled cooperative NOMA system with partial relay selection,'' in proc. 2022 IEEE NCC, IIT Bombay, pp. 1-6.

  26. S. Sharma, N. Vishwakarma, and Swaminathan R, ``Performance analysis of IRS-assisted hybrid FSO/RF communication system,'' in proc. 2022 IEEE NCC, IIT Bombay, pp. 1-6.

  27. A. Dinesh and Swaminathan R, ``Blind reconstruction of BCH encoder over erroneous channel conditions,'' in proc. 2022 IEEE NCC, IIT Bombay, pp. 1-6.

  28. G. Kumar, Swaminathan R, and A. K. Singh, ``High-degree cubature quadrature Kalman filter with fractional delayed measurement,'' in proc. 2022 IEEE INDICON, Cochin, pp. 1-5.

  29. G. Kumar G, V. K. Mishra, Swaminathan R, and A. K. Singh, “Parameter identification of coulomb oscillator from noisy sensor data,” Communication and Control for Robotic Systems, vol. 229, pp. 327 – 338, 2022, Springer, Singapore (Book Chapter)

  30. Deepshikha Singh, Cheguri Reddy, and Swaminathan R, ``Hovering UAV-Based FSO Communications with DF Relaying: A Performance Analysis,''  in proc. 2023 IEEE NCC, IIT Guwahati, pp. 1-6.

  31. S. Uniyal, N. Vishwakarma, S. Sharma, and Swaminathan R, ``Intelligent reflecting surfaces-aided mixed FSO/RF communication system," in proc. 2023 IEEE WCNC, Glasgow, Scotland, pp. 1-6.

  32. N. Vishwakarma and Swaminathan R, ``Performance analysis of multiple optical reflecting surfaces assisted FSO communication," in proc. 2023 IEEE WCNC, Glasgow, Scotland, pp. 1-6.

  33. S. Uniyal, N. Vishwakarma, Deepshikha Singh, and Swaminathan R, ``IRS-aided hybrid FSO/RF communication system with selection combining,"  in proc. 2023 IEEE GLOBECOM Workshops, Kuala Lumpur, Malaysia, pp. 1-6.

  34. Aman Gupta and Swaminathan R,  "Blind estimation of polar encoder parameters," in proc. 2023 IEEE ANTS, MNIT Jaipur,  pp. 1-6.

  35. Manojkumar Kokare, Swaminathan R, and Sumit Gautam, "Performance of multiple IRS-enabled V2V communication over double generalized gamma fading channel," accepted in 2024 IEEE COMSNETS, Bengaluru.

  36. Deepshikha Singh, Swaminathan R, Aravind Marrapu, and A S Madhukumar, "Performance analysis of multiple HAPS-based hybrid FSO/RF space-air-ground network," accepted in 2024 IEEE COMSNETS, Bengaluru. 

  37. Nayim Ahamed, Naveen B, and Swaminathan R,  "Classification of channel encoders using convolutional neural network,"  accepted in 2024 IEEE COMSNETS (poster track). 

  38. Smriti Uniyal, N. Vishwakarma, Deepshikha Singh, and Swaminathan R,  "Reconfigurable intelligent surfaces-aided mixed THz/FSO communication system," accepted in 2024 IEEE NCC, IIT Madras

  39. Prashant Sharma, Deepshikha Singh, and Swaminathan R,  "Performance analysis of UAV-based FSO communication over doubly inverted gamma-gamma turbulence channel," accepted in 2024 IEEE NCC, IIT Madras.

  40. Manojkumar Kokare, Sumit Gautam, and Swaminathan R, "On efficient resource allocation strategies for multi-RIS enhanced V2I SWIPT systems," accepted in 2024 IEEE WCNC, Dubai. 

  41. Manojkumar B. Kokare, Purva Sharma, Swaminathan R, Vimal Bhatia, and Sumit Gautam,  "Reinforcement learning and deep learning assisted spectrum management for RIS-SWIPT enabled 6G systems," accepted as a chapter in the book: Intelligent Spectrum Management: Towards 6G.
     

Sponsored Research & Consultancy Projects

1. Project Title: High-Altitude Platform Station based Hybrid FSO/RF Communication for Future Satellite Communication Systems

Principal Investigator: Dr. Swaminathan R

Scheme: Start-up Research Grant (SRG), Duration: 30 Months

Funding Agency: Science and Engineering Research Board (SERB)

Budget: Rs. 13,94,396

Status: Completed (Dec 2019 to June 2022)

​

2. Project Title: Statistical Modelling and Analysis of Reconfigurable-Intelligent-Surfaces-Assisted Hybrid FSO/RF System

Principal Investigator: Dr. Swaminathan R

Scheme: Mathematical Research Impact-Centric Support (MATRICS), Duration: 36 Months

Funding Agency: Science and Engineering Research Board (SERB)

Budget: Rs. 6,60,000

Status: Ongoing (From Feb. 2022)

​

3. Project Title: Modelling, Analysis, and Design of Aerial-Platform-based Free Space Optics Communication for
6G Networks

Principal Investigator: Dr. Swaminathan R

Co-Principal Investigator: Dr. Saptarshi Ghosh

Scheme: Core Research Grant (CRG), Duration: 36 Months

Funding Agency: Science and Engineering Research Board (SERB)

Budget: Rs. 35,64,260

Status: Ongoing (from Jan 2023)

​

4. Project Title: Automatic Modulation and Code Classification Techniques for Future Generation Communication Systems

Principal Investigator: Dr. Swaminathan R

Scheme: Visvesvaraya PhD Scheme (Phase II)

Duration: 60 Months

Funding Agency: Ministry of Electronics and Information Technology (MeitY)

Status: Ongoing (from Jan 2023)

​

5. Project Title: Blind Reconstruction of Channel Encoder and Interleaver for Future Generation Communication Systems

Principal Investigator: Dr. Swaminathan R

Co-Principal Investigator: Dr. Puneet Gupta

Scheme: CSIR-HRDG, EMR II, Duration: 36 Months

Funding Agency: Council of Scientific and Industrial Research (CSIR)

Budget: Rs. 18,70,199

Status: Recommended 

​

6. Project Title: Development of Landslide Early Warning System and Real-time Monitoring, Uttarakhand

Principal Investigator: Dr. Neelima Satyam

Co-Principal Investigators: Dr. Swaminathan R and Dr. Aruna Tiwari

Duration: 36 Months

Funding Agency: Department of Science and Technology (DST), Natural Resources Data Management System (NRDMS) division

Budget: Rs. 60,00,000

Status: Ongoing (from June 2020)

​

7. Project Title: 3-D Printed Metamaterial Based EM Designs for Stealth Applications

Principal Investigator: Dr. Saptarshi Ghosh

Co-Principal Investigator: Dr. Swaminathan R

Duration: 36 Months

Funding Agency: Defense Research and Development Organization (DRDO)

Budget: Rs. 30,66,000

Status: Ongoing (From Sept. 2022)

​

8. Consultancy Project Title: Opinion on Functionality of Telecommunication towers and Telecommunication Equipment installed on Telecom Tower

Company/Funding Agency Name: Bharti Airtel Limited - Madhya Pradesh 

Role: Consultant 

Budget: Rs. 1,47,500

Status: Completed (May 30, 2022 to July 31, 2022)

​

9. Consultancy Project Title: Development of Massive Open Online Course (MOOC) on Optical Wireless Communications: Fundamentals and Potential Applications with a vision for 5G and Beyond

Company/Funding Agency Name: Danish Management A/S (consulting firm for India - European Union standardization project)

Role: Consultant 

Budget: 3600 EUR 

Status: Completed (November 2022 to January 2023)

Institute Projects

1. Scheme: Startup India Seed Fund Scheme (SISFS)

Role: Chairman, CEO (PT), IITI ACE Foundation 

Duration: 36 Months

Funding Agency: Department of Promotion of Industry and Internal Trade (DPIIT)

Budget: Rs. 5.25 Crore

Status: Ongoing (From Aug 2023)

Remarks: Involved in preparing the proposal and presented in front of Experts Advisory Committee (EAC)

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