Major Research Objectives

Spoken Language Processing:

  • Speaker Verification
  • Multilingual speech recognition
  • Speech enhancement
  • Improving the intelligibility of dysarthric speech, and therapy tools for dysarthric patients
  • Spoken language identification

Machine Fault Identification:

  • Scalable fault models for the prognosis of faults in generators
  • Machine and Speed Independent Fault Diagnosis through vibration analysis

Biomedical Engineering:

  • Improving the performance of multi-parameter patient monitors
  • Algorithms for low cost implementation of multi-parameter patient monitors
  • Respirator and ECG signal study for estimating hyper anxiety and chronic stress
  • Developing a real time compressive sensing system for signal and Image Processing applications
  • Developing active learning methods and classification techniques for Hyper Spectral Image Processing
  • Developing Technology for Agriculture  which includes Signal and Image Processing
  • Hardware Implementation of Signal and Image Processing Algorithms

Selected Projects by UG / PG Students

  • Lane detection of Images using Hough transform
  • Efficient Image segmentation during uneven illumination
  • Hardware Implementation of EZW algorithm
  • Hardware Implementation of circular Hough Transform
  • Hardware Implementation of Bio retinal image Encoder
  • Shape matching for Object in complex images
  • Edge detection and segmentation using Gabor filters
  • Hardware implementation of Hexagonal pixel grid modeling for edge detection
  • Hardware implementation of Hexagonal pixel grid modeling for skeletonization
  • Design of  Cellular array processor using Hexagonal pixel grid modeling for edge detection and skeletonization
  • Boundary contour system modeling for dynamic compression and image edge enhancement
  • Color Image compression for Limited Displays using  selforganising feature map
  • Analysis of Interpolation Kernels For Hexagonal Lattices
  • Multiresolution Image Processing Using Hexagonal Wavelets
  • Analysis of Edge detection techniques on Rectangular and Hexagonal Sampled Grids
  • Performance analysis of Blind Carrier Phase Estimators for General QAM.
  • Lens-less Imaging by Compressive Sensing
  • Implementation of Through-wall Motion Detection using Beam forming
  • Linear Equation Solver using Improved Cholesky Decomposition on FPGA for Compressed Sensing Applications
  • Spectrum Sensing using Compressed Sensing Techniques for Sparse Multiband Signals
  • SVM based Classification of Digitally Modulated Signals for Software Defined Radio Digital Radio design using Digital Signal Processing
  • Performance Improvement of Compressed Sensing Reconstruction Using Modified-AMP Algorithm
  • Implementation of Mixed Signal Architecture for Compressed Sensing On ECG S
  • Implementation of Blind-OFDM on USRP platform for Cognitive Radio Network
  • Hyper-spectral Image denoising by Legendre-Fenchel Transformation and Classification
  • Design and Implementation of OFDM based Communication System in GNU Radio Platform
  • Design and Implementation of MIMO based Communication System in GNU Radio Platform
  • Digital Gardening using Mote based Wireless Sensor Network
  • Spectrum Sensing Implementations using Simulink
  • Analog and Digital Modulations toolkit for Software Defined Radio
  • Multi-User Spectrum Sensing Based on Multi-taper Method for Cognitive Environments
  • Wireless electrocardiogram monitoring for cardiac patients on android platform
  • Development of a Ballistocardiogram system for cardiac health evaluation   
  • ECG arrhythmia classification by using wavelet and neural networks
  •  Respiration Signal derived from PPG, Low Cost Cardio Respiratory monitor
  • Density Based Score Level Fusion for Multimodal Biometric Authentication
  • Multimodal Score Fusion using Cuckoo Search Algorithm
  • Kalman filtering techniques for fault detection and diagnosis in a continuously stirred tank reactor
  • Wireless ECG Monitoring system for Bio-suit
  • Data Logger For Miniature Model Car Using Can Bus
  • Automatic Poly-Farm Controller Using Wireless Sensor Network
  • Low Cost Collision Avoidance System Using Inter Vehicle Communication
  • Android Device controlled Infusion Pump
  • Implementation of cost effective object recognition and sorting robot using embedded image processing technique
  • Gesture based Touchless joypad
  • Electric Vehicle with Charge Drain Control Assist
  • CNC PCB Drilling Machine
  • Intelligent Mobility Solution for Differently Abled
  • Blood Sample Characterisation using Embedded Image Processing Technique
  • Bluetooth enabled low cost  Infusion Pump
  • Vision Module for Stereovision Endoscope
  • Intelligent Autonomous Personal Transport System
  • Tracking down the abnormality in PCG Signal

PhD Program & Focus

  • Signal and Image Processing applications using compressed sensing
  • Hyper Spectral Image Processing – active learning methods , classification
  • Signal and Image Processing related with agriculture.
  • Hardware Implementation of Signal and Image Processing Algorithms
  • Hexagonal Image Processing
  • Compressed Sensing in Wireless Communication
  • Communication System development using GNU Radio with USRP
  • Biomedical signal Processing, currently pursuing Ph.D in Cardiac fitness evaluation using Ballistocardiogram
  • Holter Monitor” for Lungs
  • Biomedical signal data acquistation and Signal processing
  • Application of novel non-linear state estimation techniques (like particle filtering) to model based fault diagnosis.
  • Fusion of model based and data based approaches to fault diagnosis to obtain a better estimate of the diagnosis which will have advantages of both methods.
  • Hyper spectral images will find many applications in resource management, agriculture, mineral exploration, and environmental monitoring

Funded Research Projects

  1. Development of a text/language independent speaker recognition system, funded by DRDO, completed
  2. Scalable fault models for the prognosis and diagnosis of faults of generators in aircraft electrical system, funded by National Programme on Micro and Smart Systems (NPMASS), Bangalore
  3. Robust Features for Speaker Verification, funded by TCS, ongoing
  4. Machine Independent Fault Diagnosis : A Unified Approach, funded by DST, ongoing

Research Collaborations

We collaborate with Department of Neurology, Amrita Institute of Medical Sciences, Kochi for our research in biomedical engineering. Dr. A. Anand Kumar, Professor & Head, Department of Neurology, Amrita Institute of Medical Sciences, Kochi is our lead in Biomedical engineering research.

Industry Interactions

We also interact very closely with leading industries, TCS Innovation Labs., and Centre for Development of Advanced Computing, Thiruvananthapuram to make our research relevant and meaningful.

Doctoral Students

  • Kuruvachan K George, Robust features for speaker verification, TCS Research Scholar, ongoing
  • R Gopinath, Scalable fault models for synchronous generators, ongoing
  • K A Pradeep Kumar,  A low cost ambulatory system for capturing and analysis of human vital signals, ongoing
  • M. Pushpaparajan,  Speed independent machine fault diagnosis using vibration signal analysis, ongoing

Selected Publications

  1. Reshma, U., HB Barathi Ganesh, J. Jyothi, R. Gandhiraj, and K. P. Soman, "Wavelet Based RTL-SDR Real Time Signal Denoising in GNU Radio," Advanced Computing, Networking and Informatics, pp. 397-408. Springer India, 2016. [DOI:10.1007/978-81-322-2538-6_42]
  2. S. Gayathri and R. Gandhiraj, “Implementation of Mixed Signal Architecture for Compressed Sensing on ECG Signal,” in Intelligent Systems Technologies and Applications, vol. 384, S. Berretti, S. M. Thampi, and P. R. Srivastava, Eds. Cham: Springer International Publishing, 2016, pp. 43–57.
  3. S. Santhosh, S. J. Arunselvan, S. H. Aazam, R. Gandhiraj, and K. P. Soman, “Performance Analysis of Microstrip Antenna Using GNU Radio with USRP N210,” in Computational Intelligence in Data Mining - Volume 3, vol. 33, L. C. Jain, H. S. Behera, J. K. Mandal, and D. P. Mohapatra, Eds. New Delhi: Springer India, 2015, pp. 239–249. [DOI: 10.1007/978-81-322-2202-6_21
  4. S. Sabarinath, R. Shyam, C. Aneesh, R. Gandhiraj, and K. P. Soman, “Accelerated FFT Computation for GNU Radio Using GPU of Raspberry Pi,” in Computational Intelligence in Data Mining - Volume 2, vol. 32, L. C. Jain, H. S. Behera, J. K. Mandal, and D. P. Mohapatra, Eds. New Delhi: Springer India, 2015, pp. 657–664. [DOI:10.1007/978-81-322-2208-8_60]
  5. P. Kavitha, K. M. Mohan, R. Surya, R. Gandhiraj, and K. P. Soman, “Implementation of CDMA in GNU Radio,” Procedia Computer Science, vol. 46, pp. 981–988, 2015. doi:10.1016/j.procs.2015.01.008. (Scopus Indexed)
  6. C. Anjana, S. Sundaresan, T. Zacharia, R. Gandhiraj, and K. P. Soman, “An Experimental Study on Channel Estimation and Synchronization to Reduce Error Rate in OFDM Using GNU Radio,” Procedia Computer Science, vol. 46, pp. 1056–1063, 2015. doi:10.1016/j.procs.2015.01.017. (Scopus Indexed)
  7. Ganesan, M., and E. P. Sumesh, "Analysis of Ballistocardiogram with Multiwavelets in evaluation of Cardiac Fitness," Journal of Theoretical and Applied Information Technology 77.2 (2015).
  8. Vaisakh B.K., Gopinath R., Santhosh Kumar C., Ganesan M., "Condition Monitoring of Synchronous Generators Using Sparse Coding," International Journal of Applied Engineering Research.ISSN 0973-4562 Volume 10, Number 10 (2015), pp. 26689-2669
  9. Hari Prasad S. A, Gowtham S, Radhika R, Arvind K. S, Gowthami Renny and Pradeep Kumar K. A., "A Novel Method for Seizure Prediction Based on Autoregressive Modelling and a Real-time Error Correction Algorithm", International Journal of Applied Engineering Research,Volume 10, Number 10, pp.25475-25492 published in June 2015. [Link:,http://www.ripublica... (Scopus Indexed)
  10. J.Aravinth and Dr.S.Valarmathy, “A Natural Optimization Algorithm to Fuse Scores for Multimodal Biometric Authentication”, International Journal of Applied Engineering Research ISSN 0973-4562 Volume 10, Number 8 (2015) pp. 21341-21354
  11. P V Sunil Nag, Sabarish R P Nair, Gowtham M, Sibichakravarthy V, T D Shivendran, Manjunath S., "Kalman Filtering Techniques For Fault Detection And Diagnosis In Continuously Stirred Tank Reactor (Cstr)", International Journal of Applied Engineering Research, vol. 10, no. 17, pp. 37346-37350, 2015.
  12. Athmasri B. Krishnan and K.P. Peeyush, “Blood Group Determination Using Vivado System Generator in Zynq SoC,” 7th World Congress on Bioengineering 2015,  vol. 52, pp.166-169, DOI: 10.1007/978-3-319-19452-3_44  
  13. C. Santhosh Kumar, K I Ramachandran, AAnand Kumar, "Vital sign normalization for improving the performance of multi-parameter patient monitors," Electronics Letters 11/2015;  DOI:10.1049/el.2015.2636
  14. GopinathRajendiran, C. Santhosh Kumar, K. Vishnu Prasad, K. I. Ramachandran, "Feature Mapping Techniques for Improving the Performance of Fault Diagnosis of Synchronous Generator," International Journal of Prognostics and Health Management 10/2015; 6(2):1-12.
  15. K.T. Sreekumar, R. Gopinath, M. Pushparajan, Aparna S Raghunath, C. Santhosh Kumar, K.I. Ramachandran, "Locality Constrained Linear Coding for Fault Diagnosis of Rotating Machines using Vibration Analysis,"12th IEEE INDICON, 2015; 12/2015
  16. SreeNiranjanaa Bose S, C. Santhosh Kumar, Improving the Performance of Continuous Non-invasive Estimation of Blood Pressure Using ECG and PPG," 12th IEEE INDICON, 2015; 12/2015
  17. Kuruvachan K George, Santhosh C Kumar, Ashish Panda, Ramachandran K I, Arun Das K, Veni S., "Minimizing the False Alarm Probability of Speaker Verification Systems for Mimicked Speech," Symposium on Machine Learning Algorithms and Applications (MLAA’15); 12/2015
  18. Kuruvachan K. George, C. Santhosh Kumar, K. T. Sreekumar, K. Arun Das, Alphin J. Thottupattu, Meenu S. Kumar, K. I. Ramachandran, "Amrita SRE Database: A Database for Evaluating Speaker Recognition Systems with Mimicked Speech," 18th Oriental COCOSDA/CASLRE, Shanghai; 10/2015
  19. Dhanya Mohan, C. Santhosh Kumar, "A Low Cost Implementation Of Multi-parameter Patient Monitor Using Intersection Kernel Support Vector MachineClassifier," 2nd International Conference on Communication Systems, 2015, Pilani;; 10/2015
  20. Kuruvachan K George, C. Santhosh Kumar, K. I. Ramachandran, Ashish Panda, "Cosine Distance Features for Robust Speaker Verification," Interspeech 2015, Dresden, Germany; 09/2015
  21. GopinathRajendiran, C. Santhosh Kumar, K. I. Ramachandran, V. Upendranath, P. V. R. SaiKiran, "Intelligent Fault Diagnosis of Synchronous Generators," Expert Systems with Applications 09/2015;  DOI:10.1016/j.eswa.2015.09.043
  22. Kuruvachan K George, C Santhosh Kumar, K. I. Ramachandran, Ashish Panda, "Cosine Distance Features for Improved Speaker Verification", Electronics Letters 05/2015;  DOI:10.1049/el.2015.0515
  23. C. Santhosh Kumar, Kuruvachan K George, K. I. Ramachandran, Ashish Panda, "Weighted Cosine Distance Features for Speaker Verification," 12th IEEE INDICON, 2015; 12/2015
  24. Thottupattu, Alphin J, Neha, S, Veni.S, “Hardware software co-simulation of IIR filter using Xilinx system generator for FPGA implementation”, International Journal of Applied Engineering Research, Volume 10, Issue 75 (2015)  
  25. Athmasri B. Krishnan and K. P., "Low-complexity systolic design for finite field multiplier by Rajalakshmi.T.P" in Green Computing Communication and Electrical Engineering (ICGCCEE), 2014 International Conference on Date 6-8 March 2014 DOI:10.1109/ICGCCEE.2014.6922224  Page(s):1 - 4 INSPEC Accession Number:14666020 Publisher:IEEE.
  26. K T Sreekumar, Kuruvachan K George, K Arunraj, CSanthosh Kumar, "Spectral Matching Based Voice Activity Detector for Improved Speaker Recognition," EPSICON-2014; 01/2014
  27. V. Vaijeyanthi, K.I. Ramachandran, C. Santhosh Kumar, A. Anand Kumar, R. Gopinath, Praveen Kumar Yadav, K. Vishnuprasad, "Towards enhancing the performance of multi-parameter patient monitors," 03/2014; 1(1):19-20. DOI:10.1049/htl.2013.0041, Healthcare Technology Letters.
  28. Gandhiraj.R, Soman.K.P.,"Modern Analog and Digital Communication Systems development using GNU Radio with USRP", DOI: 10.1007/s11235-013-9850-7, Telecommunication Systems: Volume 56, Issue 3 (2014), Page 367-381, Springer. (Scopus Indexed)
  29. Kuruvachan K George, C Santhosh Kumar, K I Ramachandran, Sreekumat K. T., "Towards Improving the Performance of Text/Language Independent Speaker Recognition Systems," EPSICON-2014; 01/2014
  30. Sarika K. and S. Veni, “Hardware Implementation of Hough Transform for Circle Detection,” in the International Conference on Interdisciplinary Advances in Applied Computing (ICONIAAC’14) held at Amrita school of Engineering, Coimbatore, during October 8-9, 2014, Proceedings of ACM 978-1-4503-2908-8/14/08
  31. Veni.S, K. A. Narayanankutty,  “ Vision Based Hexagonal Image Processing using Hex-Gabor,” Springer Journal - Signal, Image and Video Processing (SIViP), DOI 10.1007/s11760-012-0293-5, February 2012 (online) and published in the Journal (print version) in February 2014, Volume 8, Issue 2, pp 317-326
  32. V. Vaijeyanthi, C.S. Kumar, K.I. Ramachandran, J.K. Joy, A.A. Kumar, "Application-Specific fine tuning of multi-Parameter patient monitors," Electronics Letters 11/2013; 49(23):1432-1433. DOI:10.1049/el.2013.2273
  33. Ranjini Ram, R.Gandhiraj, K.P.Soman, “Analog and Digital Modulation Toolkit for Software Defined Radio”, Elsevier- Procedia Engineering, Volume 30, 2012, Pages 1155-1162, Dec 7-9, 2011. DOI: 10.1016/j.proeng.2012.01.975. (Scopus Indexed)
  34. Aravind.H, R.Gandhiraj, K.P.Soman, M.Sabarimalai Manikandan, Rakesh Peter, “Spectrum Sensing Implementations for Software Defined Radio in Simulink”, Elsevier- Procedia Engineering, Volume 30, 2012, Pages 1119-1128, Dec 7-9, 2011. DOI: 10.1016/j.proeng.2012.01.971. (Scopus Indexed)
  35. C. Santhosh Kumar, V. P. Mohandas, "Robust features for multilingual acoustic modeling," International Journal of Speech Technology 09/2011; 14(3):147-155. DOI:10.1007/s10772-011-9092-6
  36. S. Veni,K. A. Narayanankutty, “Image Enhancement of Medical Images using  Gabor Filter Bank on Hexagonal Sampled Grids,”  WASET  Journal , Issue 65, pp.816-821, May 2010
  37. Sandeep, S., and C.B. Rajesh,  "Differential power analysis on FPGA implementation of MICKEY 128," Computer Science and Information Technology (ICCSIT), 2010 3rd IEEE International Conference on.Vol. 9.IEEE, 2010.
  38. R.Gandhiraj, Dr.P.S.Sathidevi, "Auditory-based Wavelet Packet Filterbank for Speech Recognition using Neural Network", 15th International Conference on Advanced Computing and Communication (ADCOM 2007), Indian Institute of Technology Guwahati, Dec 18-21, 2007, India, Proceedings in IEEE Computer Society. (Scopus Indexed)
NIRF 2018