Department of Physics

National Institute of Technology, Warangal - 506004, Telangana, INDIA

: lrgr@nitw.ac.in,lrgreddy@gmail.com

: 9390100832

Interests: Medical Instrumentation; Pathology Identification by the analysis of Heart Rate Variability; Tropospheric Radio Propagation; Electrode Materials for Supercapacitors; Solar Cells

Educational Background
          1. Studied  M. Sc(Tech) , a 3-year industry oriented program,  with Electronics as specialisation, at  erstwhile Regional Engineering College (now NIT), Warangal, during 1977-80. Further, during the Post Graduation pursued courses like Engineering Drawing, Workshop Practice, 32 Weeks of Industrial Training and  had carried out the Dissertation work, for One Full Semester, at Central Electronics Engineering Research Institute (CEERI), Pilani, Rajasthan.
          2.  Obtained Ph. D from the erstwhile Regional Engineering College (now NIT), Warangal, under the faculty of Engineering and Technology, in the year  1987.


Major Research Contributions 
  1.  Developed a novel technique to diagnose the Congestive Heart Failure (CHF) using the 'dual scale entropy analysis' of Heart Rate Variability (HRV). This technique clearly discriminates the CHF cases from the old aged-but-healthy  subjects. Further, it requires much  lesser data of just 500 samples (Refer S. No.  6 in the list of Publications). 
  1.  Designed and developed a Pulse Oximeter including the Photoplethysmographic (PPG) Sensor. The pulse oximeter is an essential equipment in every operation theater for the determination of SpO2, the saturated  percentage of oxygen in arterial  blood and it is also used in ICUs. 
  1.   First to detect and report in 1985, the unusually fast and deep  multipath fading occurring in daytime on tropical coastal line-of-sight microwave links and formulated an hypothesis for its interpretation in terms of modified  atmospheric boundary layer under sea breeze  circulations(Refer S. No. 9 in the list of Publications).
 Experience of Collaborative Research 
          6-Years experience of planning and execution of collaborative research work at multiple locations, involving multiple disciplines and organizations, namely, National Physical Laboratory, New Delhi, LOS microwave links of South  Central Railways located in different cities in South India, Dept. of Telecommunication, GOI, India Meteorological Department and REC, Warangal.


Industrial Exposure: 
  1.   9-months as Trainee at Central Electronics Engineering Research Institute (CEERI), Pilani, Rajasthan.
  2.    Two months as Trainee at Central Electronics Ltd., Sahibabad, UP.



Course Taught Previously


Courses currently being handled:
  1. Medical Instrumentation ( M. Sc(Tech.), 5th Semester)
  2. Structured Digital System Design ( M. Sc(Tech.), 4th Semester)
  3. Switching Theory and Logic Design ( M. Sc(Tech), 3rd Semester)
Courses/Subjects Taught Earlier:
       For M. Sc(Tech.):
  1. Microcontrollers & Embedded Systems
  2. Medical Physics & Physiological Measurements
  3. Microprocessors & Applications
  4. Digital System Design with VHDL
  5. Switching Theory and Logic Design
  6. Linear & Digital IC Applications
  7. Electronic Devices & Circuits
  8.  Transuducers ana measurement systems.
       For B. Tech:
  1. Medical Instrumentation, an Open Elective in 3rd Year, 2nd Semester.
  2. Physics (Theory and Lab.) for 1st Year.



  1. Nagaraju Macherla, Kuldeep Singh, M.S. Santosh, Kusum Kumari , Ram Gopal Reddy Lekkala, Heat assisted facile synthesis of nanostructured polyaniline/reduced crumbled graphene oxide as a high-performance flexible electrode material for supercapacitors, Colloids and Surfaces A: Physicochemical and Engineering Aspects, Vol. 612pp 125982, 2020, https://doi.org/10.1016/j.colsurfa.2020.125982.
  2. Nagaraju Macherla, Ram Gopal Reddy Lekkala, Kuldeep Singh, and Kusum Kumari, Electrochemical analysis of polyaniline-graphene oxide composites for high performance supercapacitors, AIP Conference Proceedings 2265, 030673 (2020); https://doi.org/10.1063/5.0016905.
  3. T. Ramesh, R. Vedarajan, N. Rajalakshmi and L. Ram Gopal Reddy, Dynamic electrochemical impedance spectroscopy as a rapid screening tool for supercapacitor electrode materials, Journal of Materials Science: Materials in Electronics, Vol. 31(2)pp 1681–1690, 2020, https ://doi.org/10.1007/s1085 4-019-02686 -y.
  4. T. Ramesh, N. Rajalakshmi, K. S. Dhathathreyan and L. Ram Gopal Reddy, Hierarchical Porous Carbon Microfibers Derived from Tamarind Seed Coat for High-Energy Supercapacitor Application, ACS Omega, Vol. 3, pp 12832−12840, 2018, DOI: 10.1021/acsomega.8b01850.
  5. Srinivas Kuntamalla and Ram Gopal Reddy Lekkala, Quantification of error between the heartbeat intervals measured form photoplethysmogram and electrocardiogram by synchronisation, Journal of Medical Engineering & Technology, Vol. 42(5), pp 1-8, 2018, DOI: 10.1080/03091902.2018.1513578.
  6. T. Ramesh , N. Rajalakshmi1, L. Ram Gopal Reddy and K. S. Dhathathreyan, Hierarchically porous carbon derived from agricultural resource for high power supercapacitor applications, International Conference on Nanomaterials and Nanotechnology, VBRI Press, DOI:10.5185/icnano2017
  7. Ram Gopal Reddy Lekkala and Srinivas Kuntamalla, A Novel Approach for Comparison of Heart Rate Variability Derived from Synchronously Measured Electrocardiogram and Photoplethysmogram,  IEEE Healthcare Innovation and Point of Care Technologies (HI-POCT), 2017, DOI: 10.1109/HIC.2017.8227599.
  8. Srinivas and L. Ram Gopal Reddy, 'Reduced Data Dual scale Entropy Analysis of HRV signals for improved congestive heart failure detection', Measurement Science Review, vol. 14, No. 5, pp 294-301, 2014.
  9. Srinivas and L. Ram Gopal Reddy, An Efficient and Automatic Systolic Peak Detection Algorithm for Photoplethysmographic Signals, International Journal of Computer Applications, (0975  -  8887), Vol. 97, No.19, July 2014, pp. 18-23.
  10. Srinivas, L. Ram Gopal Reddy , 'The Effect of Aging on Nonlinearity and Stochastic Nature of Heart Rate Variability Signal Computed using Delay Vector Variance Method' , International Journal of Computer Applications, Vol.14, No.5, PP:40-44, 2011.
  11. Reddy, L. R. G., and B. M. Reddy (2007), Sea breeze signatures on line-of-sight microwave links in tropical coastal areas, Radio Sci., 42, RS4021, doi:10.1029/2006RS003545.
  12. Srinivas, L. Ram Gopal Reddy,' Quantifying the effect of aging on the autonomic control of heart rate using sequential trend analysis plot', IFMBE Proceedings, vol. 34, pp 245-248, 2011.
  13. Srinivas, L. Ram Gopal Reddy, 'Analysis of degree of nonlinearity and stochastic nature of HRV signal during meditation using delay vector variance method', Conference proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society. 2011; PP: 2720-23. doi: 10.1109/IEMBS.2011.6090746, Boston , USA.
  14. S Kuntamalla, LRG Reddy, 'Detecting congestive heart failure using heart rate sequential trend analysis plot', International Journal of Engineering Science and Technology 2 (12), 7329-7334, 2010.
  15. Srinivas, L. Ram Gopal Reddy, R. Srinivas, 'Estimation of heart rate variability from peripheral pulse wave using PPG sensor', IFMBE Proceedings, vol. 15, pp 325-328, 2007.
  16. Ram Gopal Reddy Lekkala and Srinivas Kuntamalla, 'The Effect of Chi Meditation on the Multifractal Nature of Heart Rate Variability', International Journal of Signal Processing Systems Vol. 4, No. 2, PP: 128-132, 2016.
  17. Reddy, L.R.G and Reddy, B. M, 'Terrestrial Microwave Radio Links in Tropics: Some Design Constraints', International Union of Radio Science(URSI) Commission F Triennial Open Symposium on'Wave Propagation and Remote Sensing', Ahmedabad, India, pp 148-152, 1995.
  18. Reddy, L.R.G, Reddy, B. M, Dinakar and J. R. C. Rao, 'Statistics of rainfall rates measured over a south Indian state using fast and conventional rain gauges', International Union of Radio Science(URSI) Commission F Triennial Open Symposium on 'Wave Propagation and Remote Sensing', Ahmedabad, India, pp 245-249, 1995.
  19. Reddy, L.R.G and Reddy, B. M. , 'Fading patterns and physical mechanisms associated with deep power fading observed on LOS microwave radio links in tropics', Proc. of IEE Conference on Antennas and Propagation, Edinburgh, UK, Vol. 2, PP: 660 '664, ISBN: 0-85296-572-9, 1993.
  20. L. R. G. Reddy and B.M. Reddy, 'Some observations on the influence of hydrometeors on line- of- sight microwave propagation at 7 GHz in tropics', proceedings of ISAP '92, Sapporo, Japan, PP: 889-892, 1992.
  21. Reddy, L. R. G.,'Some factors affecting the performance of line-of-sight microwave links over the South-Eastern parts of India', International Union of Radio Science(URSI) Commission F Triennial Open Symposium 'Wave Propagation and Remote Sensing', pp. 9.5.1-9.5.6, Bradford, UK, 1992.
  22. L. R.G Reddy & V.V. Rao, 'The Tropospheric Radio Propagation Phenomena', Journal of Scientific and Industrial Research, Vol. 47, PP: 507-519, 1988.
  23. L. R.G. Reddy et al, 'System Details of Monostatic Analog Echo-Sonde (sodar)', Topical Review on Optical Instrumentation, Instrument Society of India, Spl. Vol., PP 67-85, 1986.
  24. L. R.G. Reddy et al, 'VHF Transhorizon propagation studies at Warangal', Indian J. of Radio and Space Physics, Vol. 14, PP: 92-95, Aug. 1985.

PHDs Supervised

 Ph.D  Supervision:
Name of Student
Thesis Title
Completed / Ongoing
 K. Srinivas
Nonlinear Analysis and Characterisation of Heart Rate Variability in Health and Disease
 T. Ramesh

Development of Novel Porous Carbons using Agricultural Biomass for High Performance and Cost-Effective Electrodes for Supercapacitor Application

Thesis Submitted
 M. Nagaraju
 Electrode Materials for Energy Storage Devices


Conferences, Workshops and FDPs Organized

  1. Motivational Workshop for the Students from the Govt. Schools in Warangal(U) & Warangal(R) Districts on 09-01-2020.

  2. FDP on "Institution Development through Universal Human Values" during 18-12-2019 to 21-12-2019.

  3. An 8-day in-house Faculty Development Program on Universal Human Values at NITW during 24-06-2019 to 01-07-2019.

  4. An 8-day in-house Faculty Development Program on Universal Human Values at NITW duirng 28-06-2018.

  5. A two-week Induction Program for the first year B. Tech students' during 24-07-2019 to 04-08-2019.

  6. A two-week induction program for the first year B. Tech students during  23-07-2018 to 04-08-2018.

  7. National Seminar on 'Development and Evolution of Advanced Microprocessor Architectures', May 31, 2013, NIT Warangal.

  8. ASCI Program on 'Management insight for Faculty of NITW', July 3-7, 2006, NIT Warangal.

  9. National Conference on 'Physical Sciences and Engineering Education', July 9-11, 1999, REC Warangal.

  10. Induction program for newly recruited faculty of NIT Warangal, 2006.

Seminars attended(National & International) :             

  1. ‘8th International Conference on Human Values in Higher Education (8th ICHVHE-2019)’ during 1–3 March, 2019.
  2. Evolution of World Class Technical Institutions: Issues and Concerns" during 10-12 October, 2018.
  3. Workshop on Leadership Development in Higher Education for Unverisity Administrators duirng 26-28 February, 2018.
  4. Telangana State Sciences Congress(TSSC) at NIT Warangal during 22-24 December, 2018.
  5. *IEEE-NIH Special Topics Conference on Healthcare Innovations and Point-of-Care Technologies (HI-POCT 2017) , NIH, November 6-8, 2017, Bethesda Campus, MD, USA
  6. 7th IEEE International Conference on'Technology for Education', Dec 10-12, 2015, NIT Warangal.
  7. National Summit on Quality in Education (NSQE 2015), Sept. 22-23, 2015, Organized by CII, Institute of Quality, Bangalore.
  8. *International Conference on Applied Physics and Mathematics, Feb 12-13, 2015, Busan, South Korea.
  9. A National Workshop on 'Eco-Friendly Structural Innovations for Sustainable Development', July 18-19, 2014, TEQIP-II, NIT, Warangal.
  10. *33rd Annual International Conference of the IEEE Engineering in Medicine and Biology Society(EMBC), Aug 30- Sept 03, 2011, Boston, USA.
  11. *15th Nordic-Baltic Conference on Biomedical Engineering and Medical Physics (NBC 2011), June 14-17, 2011, Aalborg, Denmark.
  12. *3rd Kuala Lumpur International Conference on Biomedical Engineering, Dec 11-14, 2006, Malaysia.
  13. *National Symposium on Instrumentation (NSI-31), Oct 12-15, 2006, ITM, Gwalior.
  14. ISSS Workshop on 'Microsystems Technology', Nov 16 -19, 2005, IISc., Bangalore.
  15. *Silver jubilee National Symposium on Instrumentation, Nov 8-11, 2000, IISc., Bangalore.
  16. XXVI National Symposium of the Optical Society of India on 'Optics and Opto-electronics', Feb 4-6, 2000, REC Warangal.
  17. *National Conference on Physical Sciences and Engineering Education, July 9-11, 1999, REC Warangal.
  18. National Seminar on 'Technology Development Trends and Challenges', Oct 3-4, 1997, REC Warangal.
  19. *URSI Commission F International Symposium on 'Wave Propagation and Remote Sensing', Nov 20-24, 1995, Ahmadabad, India.
  20. Brainstorming Session on 'Coupled Phenomena in Geo-Environment', Sept 21-22, 1994, National Physical Laboratory, New Delhi.
  21. *IEE 8th International Conference on 'Antennas and Propagation', March 30-April 2, 1993, Edinburgh, UK.
  22. *International Symposium on 'Antennas and Propagation', Organized by IEICE, Japan, Sept 22-25, 1992, Sapporo, Japan.
  23. *URSI Commission F International Symposium on 'Wave Propagation and Remote Sensing', June 8-11, 1992, Ravenscar, North Yorkshire, UK.
  24. *User- Researcher Interaction Seminar on Radio wave Propagation, April 14-15, 1988, Defence Electronics Applications Laboratory, Dehra Dun.
  25. *An IETE Symposium on 'Propagation Factors in Space Communication', Sept 8-9, 1987, IIT Madras.
  26. *An IETE Symposium on 'Instrumentation ' Recent Trends in Research and Development', June 1982, Calcutta Univ., Calcutta.
  27. *National Seminar on 'Improvements to Teaching in Engineering Education', Jan 1982, REC Warangal.
  28. *National Space Science Symposium, Dec 1983, Pune University, Pune.

                * Presented a Research Paper.



 Major Research projects :     


S. No.
Title of the project
Funding Agency
Rs. (lakhs)
Interface Engineering with CVD grown MoS2 ultra-thin layers for the Improvement of Perovskite Solar Cell Performance
 DST - SERI 2016
3 Years
Microcontroller-based Photoplethysmographic Sensor for Cardiac Function Studies
New Delhi.
March 2004-
March 2007.
VHF/UHF and Microwave Propagation Studies (Phase II)
National Radar Council,
DOE, GOI, New Delhi.
May 1987- Aug 1989

Awards and Honors


Additional Responsibility

Additional Responsibilities:


  1. Dean, Student Welfare, 16-11-2017 to 01-01-2020.
  2. Chairman, Institute Hospital,  24-05-2017  to 06-12-2017.
  3.  Head, Department of Physics, during  23-06-2015 to 03-08-2016.
  4. Head, Department of Physics, during 05-10-2009 to 09-10-2011.
  5.  In-charge of Electronics Labs from October 2016 onwards
  6.  In-charge for Electronics labs during 1999 to 2009.
  7.  In-charge for Instrumentation lab during 1988 to 1998.
  8.  In-charge for Industrial Training & Project work placement of M. Sc(Tech.) students during 1995 to 2008.
  9.  Coordinator for the revision of curriculum for the Electronics stream of M. Sc (Tech), in 2006 and 2016.