Research

Major Research Objectives

1. Radio Frequency system design
2. Antenna systems for strategic applications
3. Design of compact printed MIMO antenna systems
4. Design of low power ESD protected RF circuits working at millimeter wave frequencies using CMOS device
5. EM characterization of materials for Electronic Applications
6. Development of Low Cost Materials for Electromagnetic Absorber
7. Development of EM based techniques for Agricultural Applications  and Food Engineering
8. Design and realization of a digital beamforming module for Radar
9. Real time implementation issues in Spectrum Sensing
10. Analysis of Beamforming techniques for Millimeter Wave MIMO
11. Performance Evaluation of  MIMO based Communication System on Minimized Multipath Environment

Selected Best Projects by UG/ PG Students

UG Projects:

• Quaterwave shorted substrate free microstrip antenna systems for satellite launch vehicles.
• Design, implementation and realization of automated ellipsometric system for the measurement of permittivity of planar materials.
• Substrate Integrated Waveguide based slot antenna systems and radiation studies
• Microwave characterization of Ecosand for EMI tolerant constructions
• Characterization of EM properties of fly ash
• Adaptive algorithms for digital beam forming in smart antennas
• Analysis of planar multilayered dielectric structures as electromagnetic absorbers for shielding applications

PG Projects:

• Dielectric resonator based on-chip antenna and studies on mutual coupling issues in integrated circuits.
• Substrate Integrated Waveguide based dielectric resonator antenna and its performance studies.
• Multi-layer microstrip antenna for MIMO.
• Analysis of reflective type phase shifter for millimeter wave application

Ph. D. Program and Area of Focus

Research Area: Development of low cost materials for EM absorber

Interference prevention schemes for large structures and buildings housing electrical equipment, sensitive telecommunication equipment, safety vaults, reactors and internet servers are also under investigation. Developing low cost materials from industrial by products, agricultural waste products can lead to innovative EM absorber designs, in addition to promoting sustainable technologies.

Research Area: Design of low power ESD protected RF circuits working at millimeter wave frequencies using CMOS device

To design a low power, ESD protected RF circuits working at millimeter wave frequencies using CMOS device. In this, low noise amplifers and differential amplifers are chosen whcin form the primary icons for the design of OP AMPs.

Research Area: Design of compact printed MIMO antenna systems

The design of MIMO antennas is a challenging area are the designer needs to take care of several issues that were not there when he/she were designing single or multiple antenna systems that are covering different bands. Such issues deal with the mutual coupling, the field correlation among others. In addition, designing multiple antenna systems requires introducing more metrics than those of a single antenna system.

Research Area: Design and realization of a digital beamforming module for Radar

Work on adaptive antenna arrays considering parameters like beamforming and direction of arrival. In this aspect machine learning algorithms like support vector machines and neural networks need to be investigated for radar applications .With the help of an adaptive array and the smart signal processing algorithms good directivity and clutter rejection are to be achieved with less complex circuitry.

Research Area: Performance analysis of MIMO based communication system on minimized multipath environment

The proposed project work focuses mainly towards MIMO based wireless systems under reduced multipath environment, in order to make it suitable for Satellite to multiuser communication. Spatial multiplexing and diversity maximization schemes can be deployed to achieve better spectral efficiencies and bit error rates (BER) when compared to the classical single satellite single receive station systems. Hence, the application of multiple input multiple output techniques to satellite communication systems appear to be appropriate in order to achieve increased spectral and bandwidth efficiency.

Funded Projects

Title: Design and Development of Secret Key Generation Schemes for Physcial layer security
Investigators: Dr.R.Ramanathan, Dr.M.Jayakumar
Agency: DRDO

Title: Hardware Trojan Detection and Consistency-based Diagnosis
Investigators: Dr.M.Nirmala devi, Dr.M.Jayakumar, Dr. M. Sethumadhavan, Mr.N.Mohan Kumar
Agency: DRDO

Title: Automated structural evolution and performance optimization of RF bandpass filters – An evolutionary Algorithmic Design Approach
Investigators: Dr.S.Natarajamani, Dr.M.Jayakumar, Dr.M.Nirmala Devi, Dr. C. Shunmuga Velayutham
Agency: URSC – ISRO

Selected Publications

• Ramanathan, R., and Jayakumar, M., A Performance Study of Semidefinite Relaxation Detector in Spatially Correlated and Rank Deficient Large-MIMO Systems, Springer Wireless Personal Communications, 2015
• Ramanathan, R., and Jayakumar, M, A Novel Cuckoo Search Approach to Detection in Spatially Correlated MIMO Channels, Inderscience International Journal of Mathematical Modeling and Numerical Optimization, 2015
• Design of V-Band Low Noise Amplifier using Current Reuse Topologies”, International Journal of Applied Engineering Research,Vol.9,No.24, pp.27319-27330,2015
• S. Kirthiga and M. Jayakumar, “Performance Studies and Review of Millimeter Wave MIMO Beamforming at 60 GHz, International Conference on Smart Grid Technologies and published in Elsevier Procedia Technology, August 2015.
• S. Kirthiga and M. Jayakumar, Performance of Dualbeam MIMO for Millimeter Wave Indoor Communication Systems, Springer Wireless Personal Communications, 77, 289, 2014
• S. Natarajamani, S. K. Behera, S. K. Patra, “A Compact planar diversity antennas for ultra wideband application with band notched function”, Microwave and optical technology letters ( Willey Publication), 54(4), PP.758-764, 2014.
• S. Natarajamani, S. K. Behera, S. K. Patra, “Planar ultra-wideband fractal antenna with 3.4 and 5.5 GHz dual band-notched characteristics”, International Journal of Signaland Imaging Systems Engineering, 6(1), PP.46-51, 2013.
• S. Natarajamani, S. K. Behera, S. K. Patra, “A triple band-notched planar antenna for UWB applications”, Journal of Electromagnetic Wave and Application (TaylorFrancis Publication), 27(9), PP.1178-1186, 2013.
• S. Kirthiga, M. Jayakumar, Performance and Capacity analysis of MIMO system at 5 GHz and 60GHz in Indoor Environment, WSEAS Transactions on Communications, 11, 415, 2012
• V. Naren Srinivas, D. Karthik, V. Aravinth Kumar, V. D. Sidharth, T. Meenatchi Sundaram, Soummitro Sarkar, Sabarish Narayanan B., “Determination of Complex Permittivity of Fly Ash for Potential Electronic Applications”, Applied Mechanics and Materials,  vols: 110-116, pp: 4292-4296, 2012.
• A. Raj, B. Karthigha, M. Jayakumar, Designing and Modeling of CMOS Low Noise Amplifier Using a Composite MOSFET Model Working at Millimeter-Wave Band, Springer Information Technology and Mobile Communication, 297, 2011
• Sriyuktha Sasikumar, Sabarish Narayanan B, “Analysis Reflective Type Phase Shifter for Millileter Wave Application”, Proceedings of the International Conference on Signal Processing, Communication, Computing and Networking Technologies(ICSCCN2011), pp:342-346, July 21-22, 2011
• P. Kumar, M. Jayakumar, Comparison of Bit Error Rate for Propagation Mechanisms of Millimeter Waves in a Practical Communication Systems Employing PSK and FSK, PIERS Proceedings, Cambridge, USA, 292, 2010.
• Sabarish Narayanan B, Bratin Ghosh, and Saswati Ghosh, “Antenna Factor Computation for Planar Antenna Structures using Surface Integral Equation”, Proceedings of the Tenth International Conference on Electromagnetic Interference and Compatibility (INCEMIC 2008), pp: 329-334, November 24-27, 2008.

Laboratory Facilities

Microwave and Antenna Lab

The lab is equipped with full-fledged X band wave guide bench with Klystron and Gunn based microwave sources and Scalar power meter. Over the last three years, the lab has undertaken rigorous research and development activities in the area of electromagnetic characterization of fly ash and development of antennas on cylindrical substrates. Presently an Anechoic Chamber for frequency range above 1 GHz is under construction.

Communication System Design Lab

The lab is equipped with Ettus Research Universal Software Radio Peripheral Networked Series (USRP-N210) with wide range of RF daughter boards from 0 to 6 GHz and Xilinx Spartan 3A-DSP Motherboard. USRP is a fully reconfigurable wireless transceiver which automatically adapts its communication parameters to network and user demands. All of the high-speed general purpose operations like digital up and down conversion, decimation and interpolation are done on the FPGA. The basic design philosophy behind the USRP has been to do all of the waveform-specific processing, like modulation and demodulation, filtering on the host CPU using GNU Radio. GNU Radio is development toolkit that provides communication and signal processing blocks to implement software radios. In addition to this, EM device design and analysis tool Ansys HFSS is available.

Opportunities For Projects UG/ PG/ PhD

• Substrate Integrated Waveguide based differential band pass filter for space applications
• Integrated microstrip antenna with low noise block for launch vehicle TTC application
• Compact multi-polarized antenna for MIMO configurations
• Design and development in Reconfigurable MIMO antenna
• MOS based inductor design, Moderate inversion based LNA, low power, high gain amplifier design
• EM Characterization of Materials for Low Cost Absorbers
• Developing Non Destructive Testing Techniques for Food and Agricultural industry
• Development of radio subsystems on reconfigurable hardware platform
• Analysis of precoding techniques for Massive MIMO
• Analysis of power efficient techniques for Massive MIMO

Major Research Objectives

1. To integrate technology with medical sciences to develop algorithms for successful interpretation of various biological signals.
2. To apply cutting-edge technology to evolve better systems for objective diagnosis and decision support for various clinical pathologies.
3. To collaborate with reputed technical and medical institutions
4. To become a Centre of Excellence in all focus areas.
5. To set the highest standards and to maintain them consistently.
6. To excel in research in the chosen areas of the group, evidenced by high-quality publications.

Selected Best Projects by UG / PG Students

• Simulation of a Capactive, Contactless, ECG System
• Simulation of Multi-strip Blood Glucometer
• Design and Implementation of a Calibration – Free Pulse Oximeter
• A multimodal system for automated breast mass diagnosis
• False Positive Reduction in Mammograms by Combining Unilateral and Bilateral Analysis
• Bilateral Analysis of Mammograms for False Positive Reduction using Eigen ROI Approach
• Handling Missing Data in Ipsilateral Mammograms for Computer Aided Breast Cancer Diagnosis
• Identification of Corresponding Lesions from Ipsilateral Mammograms using Eigen ROI approach
• Implementation of Power Efficient Vedic Multiplier
• Fetal ECG Extraction
• Adaptive noise level driven Total variation denoising method for Magnetic Resonance images
• Optimization of GALS CMPs using DCT as a case study

PhD Program and Area of Focus

1. Instrumentation
2. Signal Conditioning Circuits
3. Biomedical Signal Processing
4. Biomedical Image Processing

Selected Publications

1. Ridhu H Nair, Rolant Gini J, Ramachandran KI, “A Simplified Approach to Identify the Fetal ECG from abdECG and to Measure the fHR”, 7^th WACBE World Congress on Bioengineering 2015, pg.23 – 26.
2. Sandra K.R., Anusha A.S., Madhu Mohan N., Boby George, “Simulation of a Capactive, Contactless, ECG System”, in Proc. IEEE Region 10 International Technical Conference (TENCON 2014), Bangkok, Oct. 22-24, 2014.
3. Anoop A. E., Madhu Mohan N., Guruvayurappan K., “Simulation of Multi-strip Blood Glucometer”, in Proc. IEEE Region 10 International Technical Conference (TENCON 2014), Bangkok, Oct. 22-24, 2014.
4. H. Harini, L. S. Krithika, M. Shalini, Sirisha Swaminathan, and Madhu Mohan N., ‘Design and Implementation of a Calibration – Free Pulse Oximeter’, in The 15^th International Conference on Biomedical Engineering, Vol. 43, James Goh, (Ed.) Cham, Springer International Publishing, 2014, pp. 100-103.
5. R. Lavanya, N. Nagarajan and M. Nirmala Devi, “Computer aided diagnosis of breast cancer by hybrid fusion of ultrasound and mammogram features”, Springer Advances in Intelligent Systems and Computing, vol. 325, pp. 403-409, Jan 2014.
6. R.Lavanya and N. Nagarajan, “Information fusion in CAD systems for breast cancer diagnosis using mammography and ultrasound imaging: a survey”, Journal of Artificial Intelligence, vol. 7, no. 3, pp. 113-122, 2014.
7. R. Lavanya, N. Nagarajan and M. Nirmala Devi, “False positive reduction in computer aided detection of mammographic masses using canonical correlation analysis”, Journal of Theoretical and Applied Information Technology, vol. 59, no. 1, pp. 139-145, 2014.
8. N. Madhu Mohan, V. Jagadeesh Kumar, and P. Sankaran, ‘Linearizing Dual-Slope Digital Converter Suitable for a Thermistor’, IEEE Trans. Instrum. Meas., Vol. 60, # 5, May 2011, pp. 1515–1521.
9. Mohan N M, George B, and Kumar V J, ‘A Novel Dual-Slope Resistance-to-Digital Converte(link is external)r’, IEEE Trans. Instrum. Meas., Vol. 59, # 5, May 2010, pp. 1013–1018.
10. Reddy K.A., George B., Mohan N.M. and Kumar V.J., “A Novel Calibration-free Method of Measurement of Oxygen Saturation in Arterial Blood”, IEEE Trans. Instrum. Meas., Vol. 58, # 5, May 2009, pp. 1699-1705.
11. Mohan N.M., George B. and Kumar V.J., “Analysis of a Sigma-Delta Resistance to Digital Converter for Differential Resistive Sensors”, IEEE Trans. Instrum. Meas., Vol. 58, # 5, May 2009, pp. 1617-1622.
12. Mohan N. M. and Kumar V. J., “Direct Digital Converter for a Single Active Element Resistive Sensor”, Proc. IEEE International Instrumentation and Measurement Technology Conference (I²MTC), Singapore, May 5-7, 2009, pp. 828-831.
13. Mohan N. M., Mariappan L. and Kumar V. J., “A Novel Signal Processing method for the Measurement of Venous Refilling Time”, Proc. IEEE International Instrumentation and Measurement Technology Conference (I²MTC), Singapore, May 5-7, 2009, pp. 1501-1504.
14. Mohan N.M., Shet A.R., Kedarnath S. and Kumar V.J., “Digital Converter for Differential Capacitive Sensors”, IEEE Trans. Instrum. Meas., Vol. 57, # 11, November 2008, pp. 2576-2581.
15. George B., Mohan N.M. and Kumar V.J., “A Linear Variable Differential Capacitive Transducer for sensing Planar Angles”, IEEE Trans. Instrum. Meas., Vol. 57, # 4, April 2008, pp. 736-742.
16. Mohan N.M., George B. and Kumar V.J., “A Sigma-Delta Resistance to Digital Converter suitable for Differential Resistive Sensors”, Proc. IEEE International Instrumentation and Measurement Technology Conference (I²MTC), Victoria, Vancouver Is., Canada, May 12-15, 2008, pp.1159-1161.
17. Mohan N.M., George B., and Kumar V.J., “Dual Slope Resistance to Digital Converter”, Proc. 24^th IEEE Instrumentation and Measurement Technology Conference (IMTC), Warsaw, Poland, May 1-3, 2007, pp.1-5.
18. Mohan N.M. and Kumar V.J., “Novel Signal Conditioning Circuit for Push-pull type Capacitive Transducers”, IEEE Trans. Instrum and Meas., Vol. 56, # 1, Feb. 2007, pp. 153-157.
19. George B., Mohan N.M. and Kumar V.J., “A Linear Variable Differential Capacitive Transducer for sensing Planar Angles”, Proc. 23^rd IEEE Instrumentation and Measurement Technology Conference (IMTC), Sorrento, Italy, April 24-27, 2006, pp.2070-2075.
20. Reddy K.A., Bai J.R., George B., Mohan N.M. and Kumar V.J., “Virtual Instrument for measurement of Haemo-dynamic parameters using Photoplethysmograph”, Proc. 23^rd IEEE Instrumentation and Measurement Technology Conference (IMTC), Sorrento, Italy, April 24-27, 2006, pp.1167-1171.
21. Mohan N.M., George B. and Kumar V.J., “Virtual Instrument for the testing of Current and Voltage transformers”, Proc. 23^rd IEEE Instrumentation and Measurement Technology Conference (IMTC), Sorrento, Italy, April 24-27, 2006, pp.1163-1166.
22. Mohan N.M. and Kumar V.J., “Novel Signal Conditioning Circuit for push-pull type Resistive Transducers”, Meas. Sci. and Technol., Vol. 16, August 2005, pp. 1848-1852.
23. Kumar V.J., Mohan N.M. and Murti V.G.K., “Digital Converter for Push-pull type Resistive Transducers”, Proc. 22^nd IEEE Instrumentation and Measurement Technology Conference (IMTC), Ottawa, Canada, May 17-19, 2005, pp.422-425.

Opportunities for Projects UG/ PG/ PhD

• Development of a Contactless ECG System
• Multimodal Ensemble for Breast Mass Characterization
• Image Retrieval based Mass Characterization in Mammograms
• Multilesion Detection in Fundus Images for Grading Diabetic Retinopathy

Laboratory Facilities

• ECG Simulator
• EEG Simulator
• Spectrometer
• Rework system
• TINA Circuit design and simulation software
• USB Data Acquisition Devices
• Digital multimeter with software(USB adapter)
• 250KHz Analog Bandwith 8 Channel DSO
• 10Mhz synthesised function generator (LCD display, other accessories)

Research objectives

Cyber Security of Networks and Smart Infrastructure – Exploration of efficient approaches for creating secure and reliable architectures for smart grid and cyber physical infrastructure. Develop scalable techniques for malware detection in high speed network backbones.

PhD Program and Focus

Architectures for secure and reliable neaworks, smart grid and cyber physical systems

Funded projects

Malware detection based on FPGA, Sandboxing and Machine Learning (jointly with Dr. T. Gireesh Kumar of Center for Cyber Security and Dr. T. Senthil Kumar of CSE)

Publications

1. Dhanesh, P., Harish Ram, D.S, A fast and scalable pattern matching scheme for NIDS using Z algorithm, International Journal of Applied Engineering Research, 10 (16), pp. 37563-37568, 2015
2. Bhuvaneswari, M. C., DS Harish Ram, and R. Neelaveni. “Design Space Exploration for Scheduling and Allocation in High Level Synthesis of Datapaths.” Application of Evolutionary Algorithms for Multi-objective Optimization in VLSI and Embedded Systems. Springer India, 2015. 69-92.
3. Balaji, A. Jayanth, and D S Harish Ram, “FPGA Based System For Denial Of Service Detection In Smart Grid.” (2015)
4. Nikhil, N. A., and D. S. Harish Ram. “Hardware implementation of quasigroup based encryption.” Embedded Systems (ICES), 2014 International Conference on”. IEEE, 2014.
5. Ram, Dasanpotty Sai Harish, Mugasimangalam Chinnadurai Bhuvaneswari, and Suresh Umadevi, “Improved Low Power FPGA Binding of Datapaths from Data Flow Graphs with NSGA II-based Schedule Selection,” ADVANCES IN ELECTRICAL AND COMPUTER ENGINEERING 13.4 (2013): 85-92.
6. Ram, D. S., M. C. Bhuvaneswari, and Shanthi S. Prabhu, “A novel framework for applying multiobjective GA and PSO based approaches for simultaneous area, delay, and power optimization in high level synthesis of datapaths,” VLSI design 2012 (2012).
7. Yazhini, S. Anbu, and D. S. HarishRam, “High level synthesis of data flow graphs using integer linear programming for switching power reduction” Signal Processing, Communication, Computing and Networking Technologies (ICSCCN), 2011 International Conference on. IEEE, 2011
8. Ram, DS Harish, M. C. Bhuvaneswari, and S. M. Logesh, “A novel evolutionary technique for multi-objective power, area and delay optimization in high level synthesis of datapaths,” VLSI (ISVLSI), 2011 IEEE Computer Society Annual Symposium on. IEEE, 2011
9. Logesh, S. M., DS Harish Ram, and M. C. Bhuvaneswari, “Multi-objective optimization of power, area and delay during high-level synthesis of DFG’s—A genetic algorithm approach,” Electronics Computer Technology (ICECT), 2011 3rd International Conference on. Vol. 1. IEEE, 2011.

Major Research Objectives

The current research focus includes error control codes and applications of error control codes. Ongoing UG/PG/PhD projects are on Block and Convolutional Turbo codes, LDPC codes and BCH codes. Optimization techniques for decoding algorithms are also a focus of our research. Current research is also based on coded cryptographic scheme for reliable and secure communication. One of the future focuses of the group will be in the area of Genomic coding.

Selected Projects by UG / PG Students

• Implementation of Multistage Detector for CDMA receiver.
• VLSI Architecture for Reed Solomon CODEC.
• Information set based soft decision decoding.
• Adaptive iterative threshold decoding of Block Turbo Codes.
• Soft Decision Decoding Scheme for Linear Block Codes using Genetic Neural Network algorithm and particle swarm optimization algorithm.
• Decoding of Linear Block Codes using Low Complex A* Algorithm.
• Two stage Hybrid decoding techniques for LDPC.
• Soft decision decoding of linear block codes using Sum product Algorithm.
• A new Space Time Block Codes with Non –vanishing Determinants and performance analysis.

PhD Program and Area of Focus

• Turbo and LDPC codes
• Iterative decoding algorithms
• Secure and reliable communication using coding and cryptography
• Genomic coding

Funded Project

Title: Reliability based soft decision decoding of Turbo codes for satellite communication
Investigators: Dr. B. Yamuna, Dr. Karthi B, Dr. Ramesh B, Mr. Pargunarajan
Agency: SAC, ISRO

Publications

1. Yamuna Balasubramanian, Padmanabhan T.R ,”Reliability Level List based decoding of multilevel modulated Block codes”, International Journal of Information and Communication Technology, IN PRESS.
2. P. Salija, B. Yamuna, “Energy Efficient Error Control Techniques in Wireless Systems: a Survey”, Journal of Communications Technology and Electronics, Vol 60,No.11 pp1257-1263, 2015.
3. Harish Kolisetty, Sai Vamsi Krishna Vadlamudi, Vamsi Krishna Chennam, Reddy Raju R, Bhargav Anand Reddy S, Yamuna B, “A fast converging decoding scheme based on Particle Swarm Optimization for block codes”, International journal of applied engineering research, vol.10, No.13, pp 13161-33164,2015.
4. Yamuna Balasubramanian, Padmanabhan T.R, “A minimal search soft decision list decoding algorithm for Reed Solomon codes”, International Journal of Information andCommunication Technology, Vol. 6, No. 1, Page No:71-85, 2014.
5. Kalyani G, Gowtham Raj M, Akilan M, Akshay Gopikumar Menon, Gugan N, Pargunarajan K,” Decoding of Linear block codes using SUM product algorithm, “ International Journal of Electrical, Electronics and Data Communication, Volume – 2, Issue -6 ,June – 2014.
6. Yamuna Balasubramanian, Padmanabhan T.R,”Reliability level list based direct target codeword identification algorithm for binary BCH  codes“,WSEAS Transactions on Communications,Issue 6, Volume 12, Page No: 287-299, 2013.
7. Yamuna Balasubramanian, Padmanabhan T.R, “A Reliability Level List based SDD Algorithm for Binary Cyclic Block Codes“, International Journal of Computers, Communications &  Control, Volume No: 7 ,Page No: 388-395,2012.
8. Priyadarshini, N. Pargunarajan, K. “Very-low-rate convolutional codes using modified parallel architecture for spread spectrum applications,” International Conference on Process Automation, Control and Computing, PACC 2011, Jully 2011.( Scopus)
9. Priyadarshini, N. Pargunarajan, K., “A Constrained Search Algorithm for Selection of Optimal Generators in Convolutional Encoder,” International Journal of Computer Science Engineering and Technology (IJCSET), July 2011,Vol 1, Issue 6, 324-326.( Scopus)
10. Ganesh, A.R. Manikandan, P.N. ; Sethu, S.P. ; Sundararajan, R. ; Pargunarajan, K. ,“An improved AES-ECC hybrid encryption scheme for secure communication in cooperative diversity based Wireless Sensor Networks”, International Conference on Recent Trends in Information Technology (ICRTIT), 2011 Pg 1209 – 1214.( Scopus)
11. Ponmathavan S, Priya R, Sabareesan M S and Mr. K. Pargunarajan, “Performance of Alamouti Scheme”, National Research Conference on Challenges and Innovations in Information Tecnology – CIIT’10, pg No 443-446.
12. S.Veni, B.Yamuna, ‘Implementation of Analog CNN and its applications ‘ International Conference on Intelligent Sensing and Information Processing, 4-7 Jan 2005.

Opportunities for Projects UG/ PG/ PhD

• To work on Turbo codes and LDPC codes.
• To work on the application of coding in cryptographic schemes.
• To work on Genomic coding.
• To work on Decoding Architecture.
• Application of coding techniques to VLSI Test data compression.
• Error correcting codes for semiconductor memory.
• Reduce computational complexity of decoding algorithm.

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
• MEASUREMENT OF HEART RATE USING PPG AND ANALYSIS OF EFFICIENCY WITH ECG
• 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
5. Improving Healthcare Support for Rural Communities in India, funded by UK Research Council, 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.

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.ripublication.com/Volume/ijaerv10n10.htm,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,” 7^th 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,”12^th 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,” 12^th 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,” 18^th 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,” 2^nd 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 3^rd 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“, 15^thInternational 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)

Major Research Objectives

• VLSI Design & Testing – Development of efficient algorithms for VLSI testing and extending it to focus on low power concept with compression schemes
• RF CMOS System Design – Application of CMOS or GaN technology in the design of RF transceiver systems at L, S, and C bands
• Hardware Security & Trust – Enhancing the security of VLSI chips in safety critical applications like missiles & biomedical implants
• Computational Intelligence – Application the high potential intelligence concepts like Neural networks, Particle Swarm Optimization, Genetic Algorithms etc., on social and health related problems like perception engineering & cancer Diagnosis for the improvement
• Evolvable Hardware – Emulation of efficient and optimized algorithms on FPGAs to develop proof-of-concept.
• To design novel RF/Analog Integrated Circuits with MOSFETs of gate length 65nm and smaller.
• To develop novel circuit designs for high speed, high frequency, low-power and chip area efficient applications.
• To design novel high frequency (RF/Microwave/millimetre wave) and high power output circuits for RF communication.
• Implementation of the above ICs with RF/Analog MOSFET models of International foundries and subsequent fabrication in International foundries abroad, characterisation at home for International publications.
• VLSI Design, FPGA Logic Architectures and Timing Analysis.  Activity Estimation in  Field Programmable Gate Array is the main Goal. Static Timing Analysis (STA) and Statistical static Timing Analysis (SSTA) are  incorporated into the activity estimator to predict the runtime.  Approaches like parallel processing can be incorporated to improve the efficiency.
• To develop new circuit designs for high speed, low-power and area efficient applications. Further to characterize new and existing circuit simulators and/or improve speed and reduce power for digital simulation. Digital circuit devices have important applications in many fields including Signal processing, communications, sensing, transportation, avionics and space technology, and medical technology.
• Antenna simulation modeling at microwave and millimeter wave frequency region .
• EMI shielding at different frequency bands  by Design and Optimization of microwave absorbers

Selected UG/PG Projects

• FPGA Implementation of Genetically Evolved Artificial Neural Networks For Effective Resource Utilization
• A Power Aware Reordering Based Compression Scheme for Test Volume Reduction
• Power Reduction and Defect Coverage Improvement in At-Speed Testing
• FPGA Implementation of Feedforward Neural Network with Layer Multiplexing
• Security Enhanced Testing Using Scrambling and Test Compression
• Test Compression for Low-power Testing
• Small-signal Modelling of GaN HEMT based Transistor using PSO
• An Efficient FIR Filter Design Using Common Sub Expression Elimination Method
• VLSI Implementation of Multimode Floating Point Adder and Multiplier
• Design of RF CMOS LNA for Millimeter wave Technology
• Reversible Logic Synthesis of Fault Tolerant Combinational Logic Circuits
• VLSI implementation of an enhanced text compression technique based on Lempel-Ziv Welch Compression,
• Malicious struck-at and somersault combinational Trojan design and detection.
• Preventing Hardware Design Obfuscation by detecting hardware Trojan,
• Compressive sensing for PPM Modulation
• Design of Axial mode helical Antenna for NOAA-18 HRPT Reception at 1700MHz
• Optimization of SDR Based Weather Satellite image  Reception
• Dual Band Wearable Antenna for Communication and Navigation
• Support Vector regression for the design of array antennas
• Hardware Trojan Detection using scalable gate level characterization
• VLSI Architecture for Video Watermarking During Compression
• Design and implementation of a Low power Color Image Watermarking chip
•  Statistical Static Timing Analysis Using Parallel Processing of Timing Graphs
• Design of an Optimized Double Precision Floating Point Divider using Cache Memory and a Multiplier
• Decomposition and Synthesis of XOR Based Logic Circuits for LUT Based FPGAs
• Parallel Multiplier-Accumulator unit based on Vedic mathematics.
• Design for trust based hardware security.
• Scheduling for Real time operating system
• Static and Dynamic path allocation of Robots.

PhD Program and Area of Focus

• Secured testing of VLSI Circuits
• VLSI Testing and Security
• Design for Security
• Antenna Design & Optimization
• Hardware Design for Trust
• Security in Multi-core Architectures
• RF CMOS Design of Low-noise Amplifier
• Detection and Diagnosis of Malicious activity in Hardware.
• Broadband Distributed Amplifier (1-100 GHz) in 65nm CMOS for 100 Gb network
• Distributed LNA (UWB band in 65nm CMOS)
• BF Fundamental Frequency Oscillator (90 GHz and higher frequency in 65nm CMOS)
• Quadrature VCO (60 GHz band in 65nm CMOS)
• Injection Locked Frequency Divider (60 GHz and below in 65nm CMOS) for PLL
• Class E Power Amplifier for RF Communication (millimetre wave in 65nm CMOS)

Funded Projects

Title of the Research Proposal – Hardware Trojan Detection and Consistency based Diagnosis

Investigators – Dr. Nirmala Devi M., Dr. Jayakumar M., Mohankumar N., Dr.Sethumadhavan M.

Funding Agency – DRDO-New Delhi – 2015

Indian Patent number 269540 granted as on 27/10/2015 of Kalyan Bhattacharyya (single author) titled “Tunable Distributed Voltage Controlled Oscillator for Generating High Frequency Microwave Signals” in CMOS Technology.

Publications

1. Karthigha Balamurugan,  Nirmala Devi M. and Jayakumar M., “Design of V-Band Low Noise Amplifier using Current Reuse Topologies”, International Journal of Applied Engineering Research (Accepted for Publication), 2015.
2. Ramesh Bhakthavatchalu and Nirmala Devi M., “Crypto Keys Based Secure Access Control for JTAG and Logic BIST Architecture,” International Journal of Engineering and Technology, 7(3):973-984, 2015
3. Ramesh Bhakthavatchalu, Kannan, S. K., and Nirmala Devi, M., “Verilog Design of Programmable JTAG Controller for Digital VLSI IC’s,” Indian Journal of Science and Technology, 8(17), 2015.
4. R. Lavanya, N. Nagarajan and M. Nirmala Devi, “Computer aided diagnosis of breast cancer by hybrid fusion of ultrasound and mammogram features”, Springer Advances in Intelligent Computing and Systems (AISC) series, vol 325, pp. 403-409, 2015.
5. Aakash Indoria, Varatharajan Varrun, Akshay, Murali Krishna Reddy, Tejaswi Sathyasai, Baskaran Anand, Nirmala M. Devi, “State Variable Filter Design using Improvised Particle Swarm Optimization Algorithm”, Springer Advances in Intelligent Computing and Systems (AISC) series, vol 325, pp. 71- 78, 2015.
6. Darshna Siva, T. Sangavi, Sheena Mohan, Sukanya Desikan and M. Priyatharishini,” Tongue Controlled Mouse Pointer: An Assistive Technology For The Disabled“, International Journal of Applied Engineering Research, ISSN 0973-4562 Vol.10 No.9 , pp. 23945-23952 (2015).
7. R. Bharath , G. ArunSabari, Dhinesh Ravi Krishna, ArunPrasathe, K. Harish, N. Mohankumar, M. Nirmala Devi, Malicious Circuit Detection for Improved Hardware Security, Security in Computing and Communications, Vol 536 of the series Communications in Computer and Information Science ,  Proceedings of Third International Symposium, SSCC 2015, Kochi, India, , 2015.pp 464-472,2015, India
8. PremLal Paleri, Ramesh.S.R “Early Stage FPGA Architecture Development by Exploiting Dependence on Logic density”,  International Journal Of Applied Engineering Research, ISSN 0973-4562 Volume 10, Number 11 (2015) pp. 28889-28902,July 2015
9. Ramesh S. R, Dr.R.Jayaparvathy “Probabilistic Activity Estimator and Timing Analysis for LUT Based Circuits” , International Journal Of Applied Engineering Research, ISSN  0973-4562 Volume 10, Number 13 (2015) pp 33238-33242,August 2015
10. Karthick S, Dr. Valarmathy S, Prabhu E, “Low Power Systolic Array Based Digital Filter for DSP Applications,” The Scientific World Journal, Vol.2015, pp:1-6, January 2015.
11. Jithin S, Prabhu E, “Parallel Multiplier-Accumulator Unit Based on Vedic Mathematics” ARPN Journal of Engineering and Applied Sciences, Vol.9 No.22, May 2015, Vol. 10 No.8pp:3608-3613.
12. BobbalaMadhukar Reddy, Prabhu E, “An Efficient 16-Bit Carry Select Adder With Optimized Power and Delay,” International Journal of Applied Engineering Research, Vol.10 No.11, July 2015, pp:27909-27916.
13. Vigneshu R I, Dinesh Udhayan R, Raghav S, Wilfred Thadeus P, Anguselvan S, Prabhu E, “Design and implementation of digital household energy meter with a flexible billing unit using FPGA ,” International Journal of Applied Engineering Research, Vol.10 No.11, July 2015, pp:28331-28340.
14. Ramesh Bhakthavatchalu and Nirmala Devi M., “Deterministic Test Data Compression in Logic BIST,” International Journal of Applied Engineering Research 10(3):7537-7551.
15. R. Lavanya, N. Nagarajan, M. Nirmala Devi, “False Positive Reduction in Computer Aided Detection of Mammographic Masses Using Canonical Correlation Analysis“, Journal of Theoretical and Applied Information Technology (E-ISSN 1817-3195 / ISSN 1992-8645), indexed in [SCOPUS, EBSCO, INSPEC], 2014.
16. Sarathkrishna S., Karthigha Balamurugan,  Nirmala Devi M. and Jayakumar M., ”Design and Analysis of GaN HEMT based LNA with CPW Matching”, 11th International Conference on Wireless and Optical Communications Networks (WOCN 2014), India  on 11^th  – 13^th  September 2014.
17. Ramesh Bhakthavatchalu, Sreeja Krishnan, Vineeth V and Nirmala Devi Manickam, “Deterministic Seed Selection and Pattern Reduction in Logic BIST”, 18^th Int. Symposium on VLSI Design and Test, VDAT 2014, PSG College of Technology, Coimbatore, India, July1 6-18, 2014.
18. Gokul P R, Prabhu E, Dr.Mangalam H, “Performance Comparison of Multipliers based on Square and Multiply and Montgomery Algorithms,” Proceedings of the IEEE International Conference on Green Computing, Communication and Electrical Engineering (ICGCCEE-2014), 6-8th March 2014, pp:465-469.
19. Karunakaran, D.K., Mohankumar, N., Malicious combinational Hardware Trojan detection by Gate Level Characterization in 90nm technology, 5th International Conference on Computing Communication and Networking Technologies, ICCCNT 2014, China
20. Remy M, Prabhu E, Mangalam H, “A Versatile Low Power Design of Bit-Serial Multiplier in Finite Fields GF (2m),” Proceedings of the IEEE International Conference on Communication and Signal Processing (ICCSP 2014), April 3-5 2014, pp:474-478.
21. Karthick S, Dr. Valarmathy S, Prabhu E, “Low Power Heterogeneous Adder ,” International Journal of Applied Engineering Research, Vol.9 No.22, 2014, pp:13449-13464.
22. Anand, B., Aakash, I., Akshay, Varrun V., Reddy, M.K., Sathyasai T., Nirmala Devi M., “Improvisation of particle swarm optimization algorithm”, Int. Conf. on Signal Processing and Integrated Networks, SPIN 2014, Feb 20-21, 2014, Noida, Delhi-NCR, India, Proc. Published by IEEE, ISBN 978-1-4799-2865-1, pp. 20 –24.
23. Mahalakshmi, B S., Manikantan S., Bhavana P., Prem Anand M., SaiEknaath Rss., Nirmala Devi M., “Small signal modelling of GaN HEMT at 70GHz”, Int. Conf. on Signal Processing and Integrated Networks, SPIN 2014, Feb 20-21, 2014, Noida, Delhi-NCR, India, Proc. Published by IEEE, ISBN 978-1-4799-2865-1, pp. 739 – 743.
24. Janapati Sirisha, Nikkitha Vaishnavi V C, Nirmita K P, Shree Vidhya S, Yameni G , Karthigha Balamurugan,  Nirmala Devi M., Jayakumar M.,  ^“Study and Design of CMOS Based Millimeter Wave LNA Including Noise Models”, International Conference on Communication and Computing, ICC 2014, June 12-14, Bangalore, India, Proc. Published by Elsevier.
25. Ramesh Bhakthavatchalu and Nirmala Devi.M., (2014), Reconfigurable Logic Built in Self-Test technique for SoC Applications, International Conference on Communication and Computing, ICC 2014, June 12-14, Bangalore, India, Proc. Published by Elsevier, (3):1-8.
26. Padmapriya Sankar, and Nirmala Devi M, “Particle Swarm Optimization with Different Modifications”, Third Int. Conf on Recent Trends in Engg., & Tech, Chanwad, Proc. Published in Elsevier Science and Technology, pp. 551 – 556, 2014.
27. G.Srujana, S. Radhika, S. Sonu, T. Vishwanth Sai, V. Tharun , M. Nirmala Devi, “Improved Particle Swarm Optimisation with Modified Velocity Calculation”, IEEE Workshop on Computational Intelligence: Theories, Applications and Future Directions, 14th July 2013, Indian Institute of Technology, (IIT) Kanpur, pp.108-113.
28. Prabhu E, Dr. Mangalam.H, S.Karthick, “A low power multiplier using encoding and bypassing technique,” Journal of Theoretical and Applied Information Technology, Vol. 57 No.2, 20th November 2013, pp:252-260.
29. S. Karthick, Dr. S. Valarmathy, E. Prabhu, “Reconfigurable FIR filter with radix-4 array multiplier,” Journal of Theoretical and Applied Information Technology, Vol. 57 No.3, 30th November 2013, pp:326-336.
30. D Abhilash, Akshaya Sankar, S Janakiraman, G Ravi Kiran,Roshni Kaur Sudan, and V   Mekaladevi, “Compressive Sensing for Pulse Position Modulated UWB Signal” AIM/CCPE 2012,Springer-Verlag Berlin Heidelberg 2012CCIS, 296, pp. 115–121, 2012.
31. Sruthi.P.R and M.Nirmala Devi, “A Modified Scheme for Simultaneous Reduction of Test Data Volume and Testing Power“, Sixteenth International Symposium on VLSI Design and Test (VDAT 2012), Bengal Engineering and Science University, Shibpur,Kolkata , India, July 1-4, 2012, published by Springer – Lecture Notes in Computer Science (LNCS volume number 7373), pp. 198-208, ISBN 978-3-642-31493-3, Scopus indexed.
32. Sruthi.P.R and M.Nirmala Devi, “Modified AVR Code for Test Data Compression”, The 7th International Workshop on Unique Chips and Systems (UCAS-7), Feb. 26 in conjunction with The 18th International Symposium on High Performance Computer Architecture, IEEE Computer Society, New Orleans, Louisiana, USA, February 25-29, 2012.
33. D.Badari Nath, Arun Scaria, M.Nirmala Devi and N.Mohankumar, “VLSI Architecture for Compressed Domain Video Watermarking”, the First International Workshop on Peer-to-Peer Networks and Trust Management, Chennai, India, July 15 ~ 17, 2011, published by Springer in Communications in Computer and Information Science (CCIS) Series, Scopus indexed.
34. Mohankumar, N., Nirmala Devi, M., BadariNath, D., Scaria, A., VLSI architecture for compressed domain video watermarking, 2011Communications in Computer and Information Science CCIS,pp- 405,India
35. Badarinath, D., Scaria, A., Devi, M.N., Mohankumar, N. A., Compressed domain dual video watermarking for real-time applications, Proceedings of 2011 International Conference on Process Automation, Control and Computing, PACC 2011, India
36. Scaria, A., BadariNath, D., Nirmala Devi, M., Mohankumar, N., Hardware implementation of svd based colour image watermarking in wavelet domain, Proceedings of 2011 International Conference on Process Automation, Control and Computing, PACC 2011,India
37. M. Nirmala Devi and S. Arumugam, “VLSI Implementation of Artificial Neural Networks A survey”, ACTA Press International journal of Modelling and Simulation, Vol. 30, Issue 2, ISSN 1925-7082, EI compendex, Inspec index, Calgary, Canada, 2010.
38. Sai Chand, Nirmala Devi M., Arumugam S., FPGA Realization of Activation Function for Artificial Neural Networks, IEEE Eighth International Conference on Intelligent System Design and Applications (ISDA 08), Taiwan, November 26-28, 2008, pp. 159-164.
39. Mohankumar, N., Bhuvan, B., NirmalaDevi, M., Arumuga, S., A modified genetic algorithm for evolution of neural network in designing an evolutionary neuro-hardware, Proceedings of the International Conference on Genetic and Evolutionary Methods, GEM 2008, Lasvegas.

Laboratory Facilities

• VLSI Design Laboratory
• Hardware Security Laboratory

M.Tech. Students

Major Research Objectives

The advancement in VLSI technology and its impact on the complexity of VLSI chips has made the testing of these chips very crucial. Thus testing plays a key role in the design flow and is therefore a challenging task for design and test engineers. The major research objectives are

• Test pattern generation
• Fault diagnosis and analysis
• Low power VLSI
• Reconfigurable computing
• Test data compression

Selected Projects by UG / PG Students

• n-detect Test pattern generation and relaxation using ZBDDs
• Test power reduction and test pattern generation using PSO
• Test power reduction and test pattern generation using ZBDDs
• Multiple fault diagnosis of digital circuits using the optimal neural network model
• Multiple fault diagnosis in VLSI circuits using Binary decision diagrams

PhD Program and Area of Focus

• VLSI Design
• VLSI Testing
• Low power VLSI

Funded Projects

Title: Reliability based soft decision decoding of Turbo codes for satellite communication
Investigators: Dr. B. Yamuna, Dr. Karthi B, Dr. Ramesh B, Mr. Pargunarajan
Agency: SAC, ISRO

Publications

1. Navya Mohan, Anita J. P. , “A Zero Suppressed Binary Decision Diagram based test set relaxation for single and multiple stuck-at faults,” in the International Journal of Mathematical Modelling and Numerical Optimisation. (Accepted for publication)
2. Sinduja  V.,  Raghav S.,  Anita J. P., “Efficient don’t-care filling method to achieve reduction in test power”, Proc. International Conference on Advances in Computing, Communications and Informatics, ICACCI 2015.
3. Deepak Rajan, J. P. Anita, “Static Relaxation Technique with Test Vector Compression”, in the International Journal of Applied Engineering Research, Vol.10, No.11, 2015.
4. J. P. Anita, P. T. Vanathi, “Genetic Algorithm Based Test Pattern Generation for Multiple Stuck-at Faults and Test Power Reduction in VLSI Circuits”, Proc. International Conference on Electronics and Communication Systems (ICECS -2014), 2014.
5. J. P. Anita, P. T. Vanathi, “Multiple Fault Diagnosis and Test Power Reduction Using Genetic Algorithms”, in Communications in Computer and Information Science, Vol.305, Springer-Verlag, Berlin Heidelberg, pg 84-92, 2012.
6. Reeja Raju, J. P. Anita, P. T. Vanathi, “A Novel approach for Multiple arbitrary Fault diagnosis in Combinational circuits”, Proc. IEEE sponsored International conference on Process Automation Control and Computing, July’11.
7. J. P. Anita, P. T. Vanathi,  “Multiple Fault diagnosis with improved diagnosis resolution for VLSI circuits”, Proc. IEEE sponsored International conference on Computing, Communication and Networking Technologies, July’10.

Opportunities for Projects UG/ PG/ PhD

Research areas include Test pattern generation, Fault modeling, Fault analysis, Fault detection, Low power VLSI, Reconfigurable computing

Major research objectives

The research group intends to pursue research in the communication and signal processing and to develop cutting edge technologies to cater to the demands of futuristic wireless networks and systems. The research group focuses on

• Massive 5G wireless communication systems – PHY layer design, signal processing and security;
• Radio Frequency system design, Antenna systems for strategic applications, Microwave systems and materials;
• Signal processing and optimization for inverse problems in communication system design and biomedical signal processing applications;
• Hardware prototyping of signal processing algorithms.

Selected projects by UG students

• Robust MIMO Detection in the presence of Channel Estimation Errors (UG)
• A Meta Heuristic Approach to MIMO Detection (UG)
• Quaterwave shorted Substrate free microstrip antenna systems for satellite launch vehicles.(UG)
• Design, Implementation and realization of automated Ellipsometric system for the measurement of permittivity of planar materials.(UG)
• Substrate Integrated Waveguide based slot antenna systems and radiation studies. (UG)
• Investigation of Space Time Coding and Precoding for MIMO Systems (UG)
• Implementation and Analysis of Efficient Scheduling Algorithm for IEEE 802.11e (UG)
• Audio Steganography in DCT Domain (UG)
• UKF for channel estimation for high mobility system. (UG)
• Low complex fuzzy based kalman filter for fast time varying MIMO-OFDM systems. (UG)
• Design and Analysis of MIMO -OFDM Transceivers via Geometric Mean Decomposition (UG)
• Improved Channel Estimation Techniques for MIMO-OFDM Systems (UG)
• Development of Spectrum Sensing Techniques for Cognitive Radios in Low SNR Conditions (UG)
• Implementation of Software Defined Radar with Improved Signal Detection Techniques using Wavelets (UG)
• Joint CFO and Channel estimation for fast time varying channels in MIMO-OFDM systems. (UG)
• Sparse channel estimation for MIMO-OFDM system. (UG)
• Non Orthogonal Frequency Division Multiplexing system. (UG)
• Design, Analysis and Optimization of Microwave Band Pass Filters (UG)
• Design and Implementation of Angle Acquisition Card and Development of its GUI (UG)
• Design and Development of a Reconfigurable Antenna for WLAN Applications (UG)
• Implementation of Orthogonal Complementary Codes for Reducing Interference in CDMA Technology (UG)

Selected projects by PG students

• Dielectric resonator based on-chip antenna and studies on mutual coupling issues in integrated circuits. (PG)
• Substrate Integrated Waveguide based dielectric resonator antenna and its performance studies (PG)
• Multi-layer microstrip antenna for MIMO (PG)
• FPGA Implementation of Ant Colony Optimization Algorithm for MIMO Transceivers (PG)
• High Performance MIMO Systems using Simulated Annealing (PG)
• Implementation of PSO Algorithm on FPGA for MIMO Systems (PG)
• Mp3 Steganalysis (PG)
• Network Intrusion detection system in FPGA.(PG)
• Implementation of baseband transmitter and performance analysis of multiband OFDM UWB system (PG)
• EKF for channel estimation combined with decision feedback equalizer for high mobility system. (PG)
• Precoding of OFDM signals for PAPR reduction. (PG)

PhD program and area of focus

• 5G LTE systems
• Massive MIMO and OFDM systems
• Compressed sensing
• RF systems
• Millimeter wave MIMO
• Hardware architectures for signal processing
• Signal processing for communications
• Wireless information security
• Microwave Absorbers

Funded projects

Title: Design and Development of Secret Key Generation Schemes for Physcial layer security
Investigators: Dr.R.Ramanathan, Dr.M.Jayakumar
Agency: DRDO

Title: Hardware Trojan Detection and Consistency-based Diagnosis
Investigators: Dr.M.Nirmala devi, Dr.M.Jayakumar, Dr. M. Sethumadhavan, Mr.N.Mohan Kumar
Agency: DRDO

Publications

1. Anuraj, S., P.Premalatha, and T. Gireeshkumar. “High Speed Network Intrusion Detection System Using FPGA.” Proceedings of the Second International Conference on Computer and Communication Technologies. Springer India, 2016.
2. Neha S, Thushara S, Ramanathan.R (2015). Investigation of PAPR in Discrete Wavelet Transform based Multi-carrier Systems. International Journal of Engineering and Technology, Vol. 7, No. 5, pp. 1625 – 1632.
3. Meenu S Kumar, Sandra Prasad, Ramanathan.R (2015). Performance Evaluation of DWT based Multicarrier System in Time Varying Channels. International Journal of Engineering and Technology, Vol. 7, No. 5, pp. 1633 – 1641.
4. Suganya M, Ramanathan.R (2015). Performance Evaluation of DWT based Multicarrier Systems over Frequency Selective Channels. International Journal of Engineering and Technology, Vol. 7, No. 5, pp. 1651 – 1658.
5. Ramanathan.R , & Jayakumar, M. (2015). A Performance Study of Semidefinite Relaxation Detector in Spatially Correlated and Rank Deficient Large MIMO Systems. Wireless Personal Communications, Vol. 83, No. 4, pp. 2883 – 2897.
6. Ramanathan.R,  & Jayakumar, M. (2015). A Novel Cuckoo Search Approach to Detection in Spatially Correlated MIMO Channels. International Journal of Mathematical Modeling and Numerical Optimization, Vol.6, No.2, pp.101 – 113.
7. Anil Kumar. K, Raju Antony. K, T. C. Snehith, and R.Ramanathan, “Likelihood Ascent-Gibbs Sampling for Efficient MIMO Detection,” in Proc. 2015 IEEE International Advance Computing Conference (IACC), 2015, pp. 598 – 602.
8. T. C. Snehith,  Raju Antony. K, Anil Kumar. K, and R.Ramanathan, “Impact of Channel Estimation Errors on Lattice Reduction Gains in MIMO Systems,” in Proc. 2015 IEEE International Advance Computing Conference (IACC), 2015, pp. 594 – 597.
9. Kuriakose, Rinu, and P. Premalatha. “A Novel Method for MP3 Steganalysis.” In Intelligent Computing, Communication and Devices, pp. 605-611. Springer India, 2015.
10. Harsha Damodaran, Sudheesh.P, Jayakumar, M, “Extended Kalman Filter For Channel Estimation Combined With Decision Feedback Equalizer For Very High Mobility System”, International Journal of Applied Engineering Research ISSN 0973-4562 Volume 10, Number 14  (2015) pp 33914 – 33918
11. Kirthiga S, and Jayakumar M, “Performance of Dual beam MIMO for Millimeter Wave Indoor Communication Systems” Wireless Personal Communications, Springer, Vol:77,Issue.1, pp 289-307, 2014.
12. Archanaa M., Karthigha Balamurugan and Jayakumar M. “Design of MOS-based All – Pass Filter using Thermal Noise Models”, International Conference on Embedded Systems (ICES 2014). July 3rd-5th ,2014
13. Sarathkrishna S., Karthigha Balamurugan, Nirmala Devi M. and Jayakumar M., ”Design and Analysis of GaN HEMT based LNA with CPW Matching”, in:11th International Conference on Wireless and Optical Communications Networks (WOCN). September 11th – 13th, 2014.
14. Bindhiya Vinod, Karthigha Balamurugan and Jayakumar M.”Design  of CMOS based Reconfigurable LNA at Millimeter Wave frequency using Active Load”, IEEE International Conference on Advanced communication, Control and computing Technologies, May 8th- 10th, 2014.
15. Karthigha Balamurugan, M.Nirmala Devi and M.Jayakumar, “Roadmap to the modeling approach and design of RF CMOS devices”, 2nd Amrita International Conference on Women in Computing (AICWIC – 2013), Jan 9-11,2013
16. Ignatius, G.; Murali, K.V.U.; Krishna, N.S.; Sachin, P.V.; Sudheesh, P., “Extended Kalman Filter based estimation for fast fading MIMO channels,” Devices, Circuits and Systems (ICDCS), 2012 International Conference on , vol., no., pp.466,469, 15-16 March 2012
17. Sudheesh, P.; Jayakumar, A.; Siddharth, R.; Srikanth, M.S.; Bhaskar, N.H.; Sivakumar, V.; Sudhakar, C.K., “Cyclic prefix assisted sparse channel estimation for OFDM systems,” Computing, Communication and Applications (ICCCA), 2012 International Conference on , vol., no., pp.1,4, 22-24 Feb. 2012
18. S.Kirthiga and M.Jayakumar, “Performance and Capacity analysis of MIMO system at 5  GHz and 60 GHz in indoor environment”, WSEAS Transactions on Communications, Volume No.11,Page No. 415-426, November 2012.
19. Sari, Karthigha Balamurugan and M.Jayakumar, “Dependence of Substrate Resistance of RF MOSFET on the Performance of LNA at 60 GHz”, IJCSI(International Journal of Computer Science Issues) ISSN:1694-0814, Vol. 9, Issue 4, No 2, 277-283, July 2012
20. Sabarish Narayanan B, Subramanian Ramalingam, M.Jayakumar, “A Novel Analytical Model for Wave Propagation through High Frequency Circuit Substrates for analysis of Wireless Interconnects”, Proceedings of the Twelfth International Conference onElectromagnetic Interference and Compatibility (INCEMIC 2012), pp:507-510, December 6-7, 2012.
21. S.Kirthiga, M.Jayakumar and Ansu Mathew, “Least Squares Channel estimation for 2×2 MIMO Millimeter Wave System”, International Conference on Emerging Technological Trends in Advanced Engineering Research [ICETT 2012], February 20-2, 2012
22. Sari, Karthigha Balamurugan and M.Jayakumar “Extraction and Modeling of Metallization Capacitance of MOSFET for Millimeter-Wave CMOS Circuits”, 4th International Conference on Electronics Computer Technology- ICECT 2012, April 8th 2012.

Laboratory facilities

• Computational Optimization and Innovations Lab
• Communication System Design Lab
• Communication Engineering lab
• Microwave & Antenna Lab

Opportunities for projects UG/PG/PhD
Projects are currently available in the following topics

• Massive MIMO communications
• Specialized RF systems and antennas for wireless Technologies
• Vehicular networks and intelligent transportation systems
• Compact Multi-polarized antenna for MIMO configurations
• Channel Estimation Techniques
• Wireless Information security
• MIMO Radar systems
• Compressed sensing
• Design of MIMO OFDM systems
• Adaptive Filtering techniques
• Substrate Integrated Waveguide based differential band pass filter for space applications
• Development of planar wide band microwave absorbers
• Integrated microstrip antenna with low noise block for launch vehicle TTC application
• Image/Audio  steganography / steganalysis
• Coding and Cryptography
• Signal processing for communications

Sponsored Research Projects