Qualification: 
Ph.D, M.E
k_navin@blr.amrita.edu

Dr. Navin Kumar serves as Chairperson and Associate Professor at the Department of Electronics and Communication, School of Engineering, Amrita Vishwa Vidyapeetham, Bengaluru.

He comes with over 24 years of working experience in Govt, industry and academia. He has over 10 years of overseas experience in research and development. Dr. Navin has received prestigious Frauhofer challenge award for his best thesis work, Gowri Memorial award for the best journal paper, fellowship from Foundation of Science and Technology, Portugal govt., and many best conference paper awards. He had chance to work in various EU projects as team member. He is IEEE senior member and active volunteers at regional and global level. He is honest, hardworking and self made and disciplined person. Gentle in behavior and helping nature is what people describe his characteristics.

Education

  • 2011: Ph. D. in Telecommunication Engineering
    University of Minho, Aveiro and Porto, Portugal, Europe
  • 2000: M. Tech./M.E. in  Digital System Engineering
    Motilal Nehru Regional Engineering College, now National Institute of Technology, Allahabad, UP-India
  • 1996: B.Tech./B.E.  Electronics and Telecommunication Engineering.
    IETE, New Delhi - India

Professional Appointments

Year Affiliation
2014 Amrita School of Engineering, Amrita Vishwa Vidyapeetham
2013 CMR Institute of Technology, Bangalore
2011 Institution of Telecommunication, Aveiro, Portugal
2007 PhD Scholar and Research Associate, University of Aveiro, Porto and Minho and Institute of Telecommunication – Aveiro- Portugal
2003 Addis Ababa University, Addis Ababa, Ethiopia
2001 United College of Research and Engineering, Allahabad – UP
1993 Indian Air Force, Central Air Command, Allahabad

Research & Management Experience

  • Chairperson and Head of the Dept. – ECE, Amrita School of Engineering
  • Associated with various research and standard development activities such as –
  • IEEE Industry Connect: Testbed development for Smooth Traffic in Electronic City, Intelligent transportation Systems.
  • IEEE Industry Connect: Testbed development of Power Line Communication
  • Holds various responsible position in IEEE
  • General Chair at International Conference EAI UBICNET 2020, 2019, 2017
  • Steering Member EAI UBICNET 2021, IEEE CRALT 2016
  • TPC Chairs in many IEEE conferences IEEE CONECCT 2021, 2020, 2019, VLSI SATA 2017, 2016, 2015
  • Local Arrangement chair and workshop chairs 5G World Forum, 2020
  • Organized IEEE International Workshop on 5G Wireless and Future Technology (5GWFT) in association with IEEE ANTS 2020, 2019, 2018, 2017, 2016
  • Publication chairs IEEE ANTS 2016 and numerous IEEE International Conferences.

 Membership in Professional Bodies

  • Senior Member, IEEE
  • Fellow, Institution of Engineers, India
  • Life Member IETE, India
  • Life Member International Association of Engineers (IAEng)

Certificates, Awards & Recognitions

  • Fraunhofer Challenge Award, 2010-2011
  • Gowri Memorial Award, 2009
  • Fellowship, Foundation of Science and Technology (FCT), Portugal (2008-2011)
  • Multiple Best Conference paper awards outside India
  • ITIL Foundation (2011) Certification from PeopleCert, Oct 2013.
  • Software Defined Networking (SDN) Certified from Georgia Institute of Technology, USA, (May-Aug 2014).
  • Secretary IEEE Bangalore Section (2020-2021)
  • Founding Chair, IEEE Vehicular Technology Society (VTS) Bangalore (2020-2021)
  • Chair, Membership Development, IEEE Bangalore Section (2019)
  • Chair, IEEE Communication Society (ComSoc) Bangalore (2017-2018)
  • Secretary, IEEE ComSoc Bangalore (2016)
  • ASE Student Branch Counsellor, (2017 – till date)

Publications

Publication Type: Journal Article

Year of Publication Title

2021

B. Suresh Babu and Dr. Navin Kumar, “Performance Analysis of Spectrum Sharing in mmWave Cellular Networks”, 2nd EAI International Conference on Big Data Innovation for Sustainable Cognitive Computing, 2021.[Abstract]


In this paper, we have analyzed the performance of different classifications of spectrum sharing techniques. A number of important performance parameters such as throughput, association probability, empirical cumulative distribution function (CDF), signal to interference noise ratio (SINR), percentile of user rate, and varying bandwidth are considered in the analysis. In this work, we have also compared the multiuser interference with K number of cognitive radio networks (CRs) where the existence of user equipment (UE) is assumed. We have compared different types of CR channels such as multi-access channels (MAC), parallel access channels (PAC), and broadcast channels (BC), with fully licensed spectrum sharing network. The analysis is done for the number of use cases and scenarios. It is observed that throughput is higher for MAC and PAC when CR is less than 100. It is also seen that for more number of base station per km2, the throughput is high, but SINR is lowered.

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2021

R. S. Nandan and Dr. Navin Kumar, “Performance Analysis of VLC Indoor Positioning and Demonstration”, 2nd EAI International Conference on Big Data Innovation for Sustainable Cognitive Computing, 2021.[Abstract]


Precise indoor positioning is a widely researched topic currently. Many existing or new radio devices and standards are being explored for this purpose. Existing infrastructure or technology is always advantageous as it might reduce the cost and at the same time can be used for other purposes. The emerging visible light communication (VLC) is another technology being researched for precise positioning, especially in the indoor environment. VLC can be designed on existing infrastructure or slightly modified systems, and positioning using VLC would find usage in real-life scenarios. In this positioning system, an object whose location needs to be determined must have a VLC receiver. In this work, a comparative study is performed for popular algorithms through simulation as well as hardware demonstration. Thorough analysis and simulation are performed for circular lateration, hyperbolic lateration, differential detection, and angulation; the hardware implementation and demonstration as a proof of concept (POC) is completed for circular lateration and differential detection. Both these models use received signal strength (RSS) to calculate distances. We use a single photodetector for implementing circular lateration whereas two photodetectors for demonstrating differential technique. We observe that the differential detection performs relatively better compared to circular lateration, that is, the error is reduced in differential detection.

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2021

J. Pechetti, Hallingar, B., Prasad, P. V. N. D., and Dr. Navin Kumar, “Performance Analysis of Polar Codes for 5G Wireless Communication Network”, 2nd EAI International Conference on Big Data Innovation for Sustainable Cognitive Computing, 2021.[Abstract]


Polar Codes have lately been chosen for control channels in physical layer (Layer 1) as short code communication in 5G for error correction. The standard clearly defines the algorithm for polar encoder. However, the standard doesn't explicitly state the algorithm for polar decoders. Polar decoders are of key value for the equipment manufacturers/chip vendors for showing better system performance with control channels. This work focuses on exploring and analyzing some of the polar decoder algorithms, validating performance by simulation, and identifying suggestions for better performance characteristics. Performance with respect to block error rate versus SNR (signal-to-noise ratio), execution time, and complexity is discussed and compared with the legacy decoders. A new methodology is proposed to overcome the long processing cycle times and larger memory size requirement with proper selection of the algorithm in consideration of the standard deviation of the demodulated I&Q soft bit samples. Results from SC (successive cancellation) and SCL (successive cancellation list) algorithms along with the proposed improvement in decoder are explained and discussed.

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2020

A. Nawandhar, Dr. Navin Kumar, R, V., and Yamujala, L., “Stratified squamous epithelial biopsy image classifier using machine learning and neighborhood feature selection”, Biomedical Signal Processing and Control, vol. 55, p. 101671, 2020.[Abstract]


Squamous cell carcinoma (SCC) of oral cavity is the most common among oral cancer patients. In this paper, we have developed machine learning based automatic oral squamous cell carcinoma (OSCC) classifier named as Stratified Squamous Epithelial Biopsy Image Classifier (SSE-BIC) to categorize H&E-stained microscopic images of squamous epithelial layer in four different classes: normal, well-differentiated, moderately-differentiated and poorly-differentiated. Five classifiers are used to perform the classification by maximum voting method. Total 305 features are extracted from the images of oral mucosa which include color features, textural features, gradient features, geometrical features and tamura features. Unsupervised data mining is used for segmenting the cellular area to compute geometrical features of the cells retaining color details of the images. Feature selection has been performed by neighborhood component feature selection (NCFS) technique. Total 676 images have been used to design, train and test the classifier. A detailed performance analysis is presented with individual feature sets and hybrid feature sets with feature selection applied using individual classifiers as well as proposed classifier. The proposed classifier achieves overall accuracy of 95.56%. This can account for first level of automatic screening of the biopsy images.

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2020

S. M. Kumari and Dr. Navin Kumar, “Channel model for simultaneous backhaul and access for mmWave 5G outdoor street canyon channel”, Wireless Networks volume, vol. 26, no. 8, pp. 5997 - 6013, 2020.[Abstract]


Millimeter waves (mmWaves) with very wide frequency bands are proposed for 5G new radio to deliver higher data-speed and capacity. Transmission using mmWaves suffers significant path loss and can be compensated by employing directional antennas. The narrow-beam directional antennas act as spatial filters that filter out multipaths falling outside their beam area. This, together with the insignificance of diffraction and diffused scattering in urban outdoors causes mmWave outdoor channel multipath to be spatially sparse with few specular reflections, posing unique requirements on channel modeling. In this paper, we have derived a low complexity mmWave directional channel model based on ray tracing for the urban microcell street canyon environment. A comprehensive characterization of outdoor links in various realistic scenarios including, line of sight (LOS)/non-LOS, beam aligned/unaligned and road canyon with/without crossroads is presented. The model captures azimuth and elevation directions of propagation in 3D plane by using a highly directional horn antenna design. Atmospheric absorption loss of mmWave is also modeled to enhance the model’s accuracy and generality. The model is validated against measurements reported in the literature. Furthermore, the channel is studied for varying propagation conditions, antenna beamwidths and polarizations, transmitter/receiver heights and positions, and street deployment parameters. Additionally, we propose a metaheuristic algorithm called particle swarm optimization to simultaneously optimize the deployment parameters that minimize path loss as the objective function. The proposed model helps in mmWave system evaluation without the necessity for any costly measurement setup or complex off-the-shelf ray tracing model.

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2020

S. M. Kumari, Dr. Navin Kumar, and Prasad, R., “Optimization of street canyon outdoor channel deployment geometry for mmWave 5G communication”, AEU - International Journal of Electronics and Communications, vol. 125, p. 153368, 2020.[Abstract]


Millimeter Wave (mmWave) channel study is important in 5G communication to assess novel technological solutions in realistic environments. Thus, it is vital to develop reliable channel models integrating the effects of mmWave atmospheric absorption, foliage loss, and the directionality of high gain antenna systems used in mmWave links. In this paper, a design is presented that combines mmWave channel modeling with machine learning for the efficient management of environment geometry and channel specification in a 5G urban microcell (UMi) street canyon (SC) outdoor channel. Accordingly, we first investigate the channel characteristics of mmWave line of sight (LOS) and non-line of sight (NLOS) directional outdoor links in various reference cases. The analysis is conducted for the backhaul and cellular access cases using a low complexity custom channel model based on ray tracing. Additional modeling components such as antenna directionality, oxygen absorption, and foliage loss modeling are also included to enhance accuracy and generality. It is observed that the estimated channel path loss is largely dependent on SC deployment parameters due to the antenna directionality combined with the small wavelength of mmWaves, and the use of correct values for them is essential to obtain optimal channel performance. Hence, we apply a metaheuristic algorithm called particle swarm optimization (PSO) for the optimal placement of position and deployment parameters of SC channel in a mmWave communication system to yield the best channel path loss.

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2020

A. N., Dr. Navin Kumar, and Lakshmi, V. Y. S., “GPU Accelerated Stratified Squamous Epithelium Biopsy Image Segmentation for OSCC Detector and Classifier”, Springer Journal on Signal processing and Control , 2020.

2019

S. Pournamy and Dr. Navin Kumar, “System Level Performance Analysis of Designed LNA and Down Converter for IEEE 802.11ad Receiver”, Lecture Notes of the Institute for Computer Sciences, Social-Informatics and Telecommunications Engineering, LNICST, vol. 276, pp. 17-32, 2019.[Abstract]


A low noise amplifier (LNA) operating at millimeter wave (mmWave) frequency and a down converter suitable for IEEE 802.11ad receiver is designed in a 65 nm radio frequency (RF)-CMOS low leakage (LL) process. These designed blocks are integrated in a super heterodyne receiver architecture and the overall performance of the receiver is analyzed. The designed LNA gives a performance metric of 20 dB of gain, 1.7 dB of noise figure (NF) and −7.78 dBm of IIP3. Modified Gilbert cell topology is used for down converter which gives a conversion gain of 1.5 dB from 57 GHz to 66 GHz, input P1dB of −7.8dBm and IIP3 of 8.78 dBm with RF at 57.24 GHz from a 1.2 V supply voltage and a 1Vpp of local oscillator (LO) drive. The obtained IIP3 is 10.08 dB higher than the conventional Gilbert cell and offers an error vector magnitude (EVM) improvement of −23 dB at the receiver. This work provides RF designers a comprehensive understanding of system and circuit level on pre silicon base. © 2019, ICST Institute for Computer Sciences, Social Informatics and Telecommunications Engineering.

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2019

M. Lalapeta, Sagar B., and Dr. Navin Kumar, “Performance Analysis of Femtocell on Channel Allocation”, Lecture Notes of the Institute for Computer Sciences, Social-Informatics and Telecommunications Engineering, LNICST, vol. 276, pp. 1-16, 2019.[Abstract]


Femtocell channel assignment is an important design criteria in cellular systems. In femtocell, access mechanisms are classified in to three classes: open access, closed access and, hybrid access. Additionally, the subscribers in the femtocell network are divided into two groups: subscriber group (SG) and non-subscriber group (NSG). Normally, some channels are reserved for SG. In this paper, five channel assignment models are briefly discussed and analyzed. The performance parameters such as blocking probability for each case is derived and analyzed. Furthermore, other parameters such as bit error rate (BER), the capacity for different path loss condition are also analyzed. We also identified the optimum reserved percentage of channel for SG so that performance remains the highest. The results show that the increase in offered traffic increases the blocking probability. Also, as the base stations increase, BER decreases and the capacity increases. © 2019, ICST Institute for Computer Sciences, Social Informatics and Telecommunications Engineering.

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2018

M. Kumar Jha and Dr. Navin Kumar, “Energy Efficient Lighting System for Indoor Parking with Ubiquitous Communication”, Wireless Personal Communications, vol. 100, no. 2, pp. 379 - 389, 2018.[Abstract]


This paper presents visible light communication (VLC) based energy efficient lighting system in indoor parking area for illumination and at the same time would offer ubiquitous data communication. Light emitting diodes (LEDs) based VLC is used for communication and illumination at the same time. We have optimized the position of LED emitters on the ceiling in the parking area to obtain the desired signal-to-noise ratio (SNR) and bit error rate (BER). Two lighting configurations in the parking area are discussed. We compared the power transmission from LED emitters, number of emitters, SNR distribution, BER and cost for both the configurations. Multi-level pulse modulations are used in this work along with simple on off keying (OOK) for modulation. We compared OOK with M-PAM, multi-level pulse position modulation and invert multi-level pulse position modulation to obtain the required SNR and power to achieve the same BER. Simulation results are presented and discussed. It is observed that the system allows uniform illumination in the parking area and at the same time high data rate communication.

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2018

S. M. Kumari, Rao, S. A., and Dr. Navin Kumar, “Outdoor Millimeter-Wave Channel Modeling for Uniform Coverage Without Beam Steering”, Ubiquitous Communications and Network Computing, 2018.[Abstract]


Diverse performance requirements of the emerging 5G cellular systems and their deployment challenges motivate researchers to explore high frequency millimetre wave (mmWave) spectrum as a potential solution. The allocation and utilization of mmWave spectrum in cellular communication is a new frontier. In this paper, we investigate a directional mmWave small cell outdoor propagation channel by exploiting its deterministic nature; using ray tracing method. Estimates on specific attenuation measurements and free space propagation parameters reveal that directional transmission is inevitable and would result in a channel model divergent from that of an omnidirectional propagation model. In addition, we examine the effect of antenna tilting in the access links to establish highly directional adaptive link. Capacity of the sparsely faded channel is also analyzed. Results exemplify that, beyond 50 m propagation range, the received signal strength in mmWave small cells employing base stations of height 5 m as opposed to macro cells with base station height of 20 m is independent of beam steering. A simplified geometry devoid of the complexity of adaptive beam steering is hence proposed to provide uniform signal strength in an outdoor small cell channel to affirm low latency.

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2018

R. Sharma, Dr. Navin Kumar, and Srinivas, T., “Markov Chain Based Priority Queueing Model for Packet Scheduling and Bandwidth Allocation”, Ubiquitous Communications and Network Computing, 2018.[Abstract]


This paper considers classification of diverse traffic types in Internet of Things (IoT) based on importance of data rate, packet size and proposes a priority-based probabilistic packet scheduling strategy for efficient packet transmission. Reduction of peak resource usage, dynamic control of service rate corresponding to arrival rate and QoS buffer management are few main factors considered to develop this strategy. By calculating percentage of link bandwidth required for prioritized traffic in each cycle, we provide quality of service (QoS) to real time traffic in IoT and non-IoT applications. Different experiments including MPEG traffic traces and Poisson traffic are conducted to verify the proposed scheduler. Also, performance of scheduler for both IoT and Non-IoT applications is compared for different data rates. We observe that the proposed packet scheduler satisfies QoS requirements for both IoT and non-IoT traffic.

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2018

R. Sharma, Dr. Navin Kumar, Gowda, N. B., and Srinivas, T., “Packet Scheduling Scheme to Guarantee QoS in Internet of Things”, Wireless Personal Communications, pp. 1-13, 2018.[Abstract]


In this paper, a new prediction based dynamic scheduling mechanism is proposed to ensure quality of service especially in internet of things (IoT) by dynamically allocating bandwidth. The scheduling scheme is analyzed for two different applications: (1) to accommodate various streaming data of IoT applications or for medical applications. Traffic is segregated based on different traffic characteristics such as bit rate, packet loss rate and tolerable delay into different classes and they are prioritized based on these characteristics; and (2) to consider continuous long time data from all lightweight devices like sensors. The algorithm allocates bandwidth such that its utilization can be optimized for different applications. The scheduler decision is divided into two steps: (1) calculating average increase in queue length of high priority and medium priority services at current time slot from the previous time slot and, (2) adding these values to previous weight values for corresponding services and multiplying with a coefficient. The performance is carried out under different system loading and scenarios. The results illustrate the improvement of the advised scheduler with respect to end to end delay distributions, packet drop and end to end jitter values. © 2018 Springer Science+Business Media, LLC, part of Springer Nature

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2018

S. K. Patra and Dr. Navin Kumar, “Challenges to developing a secure, cloud-based offline mobile application”, Lecture Notes of the Institute for Computer Sciences, Social-Informatics and Telecommunications Engineering, LNICST, vol. 218, pp. 46-53, 2018.[Abstract]


The alliance with mobile device cloud computing technology promises new ways of developing business application. Using web and cloud technology, it is possible to transfer a small part of secured business data from cloud to the small storage mobile devices. However, it is challenging to keep secure data in offline mode when the web application is unable to connect to the cloud and sync those offline data at online mode. The paper discusses architecture of cloud-based mobile application. The proposed architecture helps us to develop cloud-based mobile application. Special consideration of low memory and network connectivity on the mobile device is taken into account. We present various challenges to design a cloud-based mobile application, store the data in a secured manner at offline mode and sync those at online mode. This would greatly improve enterprise productivity even when users are working offline. © 2018, ICST Institute for Computer Sciences, Social Informatics and Telecommunications Engineering.

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2015

Dr. Navin Kumar, “Probabilistic Prediction-based Packet Scheduling Scheme in Internet of Things”, Journal of Ubiquitous Systems & Pervasive Networks, vol. Volume 3, 2015.

2015

R. Sharma, Dr. Navin Kumar, Gowda, N. B., and Srinivas, T., “Probabilistic prediction based scheduling for delay sensitive traffic in internet of things”, Procedia Computer Science, vol. 52, pp. 90-97, 2015.[Abstract]


This paper proposes a probabilistic prediction based approach for providing Quality of Service (QoS) to delay sensitive traffic for Internet of Things (IoT). A joint packet scheduling and dynamic bandwidth allocation scheme is proposed to provide service differentiation and preferential treatment to delay sensitive traffic. The scheduler focuses on reducing the waiting time of high priority delay sensitive services in the queue and simultaneously keeping the waiting time of other services within tolerable limits. The scheme uses the difference in probability of average queue length of high priority packets at previous cycle and current cycle to determine the probability of average weight required in the current cycle. This offers optimized bandwidth allocation to all the services by avoiding distribution of excess resources for high priority services and yet guaranteeing the services for it. The performance of the algorithm is investigated using MPEG-4 traffic traces under different system loading. The results show the improved performance with respect to waiting time for scheduling high priority packets and simultaneously keeping tolerable limits for waiting time and packet loss for other services. © 2015 The Authors. Published by Elsevier B.V.

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2014

Dr. Navin Kumar, “Visible Light Communication Based Traffic Information Broadcasting Systems”, International Journal of Future Computer and Communication, pp. 26-30, 2014.[Abstract]


Traffic safety information broadcast from traffic lights using Visible Light Communication (VLC) is a new cost effective technology which can draw attention to drivers to take necessary safety measures. This paper presents a VLC broadcast system considering LED-based traffic lights. It discusses the conceptual methodology for integrating traffic light road side unit (RSUs) with impending intelligent transportation systems (ITS) architecture. Results from a case study of VLC system for information broadcast are also presented.

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2012

Dr. Navin Kumar and Kumari, N., “Conceptual Architectural Design of Indian Railway Intelligent Transportation Systems”, Communication Technologies for Vehicles, 2012.[Abstract]


Modification of railway transportation to railway intelligent transportation system (RITS) will not only compete from other modes of transportation but also increase the efficiency and safety. Speedy development of emerging technologies such as communication and computing, intelligent systems, technological development of railway industries can be effectively integrated over existing infrastructures for Indian Railway (IR) to develop and design RITS. This new generation of railway transportation (RITS) will able to meet the challenges of IR vision 2020 and beyond. The use of RITS architecture encourages structured development and integration of intelligent transportation systems (ITS) that lead to maximization of benefits by minimizing redundancies and maximizing capabilities. This paper discusses a conceptual distributed framework for a multi-layered RITS architecture that can be designed for integrating generated information. The paper main focus is conceptual design of RITS in IR network. It also addresses the design issues and challenges in the IR scenario.

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2010

Dr. Navin Kumar and Lourenco, N., “Led-Based Visible Light Communication System: A Brief Survey and Investigation”, Journal of Engineering and Applied Sciences, vol. 5, pp. 296-307, 2010.[Abstract]


The study investigates on Light Emitting Diode (LED) based Visible Light Communication (VLC) systems. Starting with a short review on High Brightness (HB) LEDs and their recent performances reaching up to 100 Lm W -1, the researchers examine the processes and techniques of using light emitted by LEDs as a mediwn for carrying data. The technology exploits the inherent high rate switching characteristic of these devices. In addition, investigation on different modulation techniques is explained. Recent developments in VLC and its potential application areas are discussed. A prognosis for future trend, functional requirements and challenges are also discussed.

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2008

Dr. Navin Kumar, Lourenco, N., Spiez, M., and Aguiar, R., “Visible Light Communication Systems Conception and VIDAS”, IETE Technical Review, vol. 25, 2008.[Abstract]


Visible Light Communication (VLC) using LEDs is emerging as a key technology for a ubiquitous communication system, because LED has the advantages of fast switching, long life expectancy, being less expensive and being visible light that is safe for the human body. The VLC system is expected to undergo rapid progress, inspiring numerous indoor and outdoor applications; however, many technical issues need to be addressed, especially in outdoor environment. In order to provide a better understanding of the research challenges of VLC, this article presents a detailed investigation of the current state-of-art concept. Open research issues such as channel modelling and modulation techniques are also discussed, with the objective of triggering new research interest in this field. The paper also introduces our ongoing development of Wireless USB Interface and the project VIDAS.

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Publication Type: Conference Paper

Year of Publication Title

2020

A. Nawandhar, Dr. Navin Kumar, and Yamujala, L., “Random Subspace Combined LDA Based Machine Learning Model for OSCC Classifier”, in Modeling, Machine Learning and Astronomy, Singapore, 2020.[Abstract]


Oral squamous cell carcinoma (OSCC) remains a major death causing oral cancer in developing countries. In recent years, tremendous development in medical imaging devices made microscopic colour images of biopsy samples available to the researchers. Image processing and machine learning techniques can be used to develop automatic cancer grading mechanism. In this work, automatic OSCC classifier using Linear Discriminant Analysis combined with Random Subspace is developed and analyzed. The proposed classifiers automatically classifies the input image in one of the four categories, namely: Normal, Grade-I, II or III. Total 83 colour and texture features are computed from the 100 Haemotoxylin and Eosin (H&E) stained images of oral mucosa. The overall accuracy of the proposed classifier is 93.5% with sensitivity and specificity of 0.89 and 0.95 respectively.

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2020

V. Dhanwani, Dr. Navin Kumar, Bachkaniwala, A. Kalpesh, Rawal, D., and Kumar, S., “Assessment of Candidate Technology ETSI: DECT-2020 New Radio”, in 2020 IEEE 3rd 5G World Forum (5GWF), Bangalore, India, 2020.[Abstract]


A number of IMT-2020 candidate technologies including the 3GPP have been submitted to the ITU-R. All candidate technologies are expected to meet the minimum performance requirements set by ITU-R for getting recommended as IMT-2020. In this paper, based on the submissions for Digital Enhanced Cordless Telecommunication (DECT-2020 NR) technology, we have evaluated the performances of latency, reliability and connection density as per ITU-R evaluation methodology. We found that the latency requirements can only be met using half-slot transmissions or HARQ-less full-slot transmission in contrary to the results submitted in the self-evaluation report of the DECT-2020 NR. Due to lack of details in the submissions; like the channel and interference modeling between device to device relaying, scheduling and control of relay propagation direction, we could not conclude whether the DECT-2020 NR can meet the minimum performance requirement of connection density of IMT-2020.

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2020

R. Makkar, Kotha, V., M Kumari, S., Rawal, D., Chakka, V. Kumar, and Dr. Navin Kumar, “Performance of Downlink SISO NR System using MMSE-IRC Receiver”, in 2020 IEEE 3rd 5G World Forum (5GWF), Bangalore, India, 2020.[Abstract]


In this work, we investigated the performance of single input single output (SISO) downlink channel considering 5G new radio (NR). A number of parameters such as different modulation schemes, channel coding with varying code rates, scalable numerology μ and 3GPP channel models have been considered for evaluation. In addition, the minimum mean square error-interference rejection combining (MMSE-IRC) technique for interference mitigation and bit error rate (BER) performance is analyzed and presented. We also compared the sum-rate performance of LTE and 5G NR. It is observed that MMSE-IRC receiver successfully mitigates the interferences compared to only MMSE based receiver. Simulation results also show performance improvement over various parameters like sum-rate, interference mitigation and BER compared to prior technologies i.e. 4G-LTE, WiMAX, etc.

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2020

P. Kumar A. Reddy, Dr. Navin Kumar, Tirumalasetty, S. Sai Apoorv, Srinivasan, S., and J James, V. Babu, “Latency Analysis for IMT-2020 Radio Interface Technology Evaluation”, in 2020 IEEE 3rd 5G World Forum (5GWF), Bangalore, India, 2020.[Abstract]


The International Telecommunication Union (ITU) is currently deliberating on the finalization of candidate radio interface technologies (RITs) for IMT-2020 (International Mobile Telecommunications) suitability. The candidate technologies are currently being evaluated and after a couple of ITU-Radiocommunication sector (ITU-R) working party (WP) meetings, they will become official. Although, products based on the candidate technology from 3GPP (5G new radio (NR)) is already commercial in several operator networks, the ITU is yet to officially declare it as IMT-2020 qualified. Along with evaluation of the 3GPP 5G NR specifications, our group has evaluated many other proponent technologies. 3GPP entire specifications were examined and evaluated through simulation using Matlab and using own developed simulator which is based on the Go-language. The simulator can evaluate complete 5G NR performance using the IMT-2020 evaluation framework. In this work, we are presenting latency parameters which has shown some minor differences from the 3GPP report. Especially, for time division duplexing (TDD) mode of operation, the differences are observed. It might be possible that the differences are due to assumptions made outside the scope of the evaluation. However, we considered the worst case parameter. Although, the report is submitted to ITU but it is also important for the research community to understand why the differences and what were the assumptions in scenario for which differences are observed.

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2020

M. Kumar Jha, Dr. Navin Kumar, and Lakshmi, Y. V. S., “Performance of Zero-Biased NOMA VLC System”, in 2020 IEEE 3rd 5G World Forum (5GWF), Bangalore, India, 2020.[Abstract]


Non orthogonal multiple access (NOMA) is used in visible light communication (VLC) to achieve better system capacity. In VLC, unipolar signal is required which is normally achieved using DC-bias, clipping or flipping of negative portion. However, these techniques result in energy and spectral inefficiency. In this work, we proposed NOMA for VLC using zero bias without any clipping. The system is compared with OFDMA VLC for their rate pairs between the users, the spectral efficiency (SE) and energy efficiency (EE). Additionally, the system performance is analyzed for transmit power and bit-error-rate (BER). We further analyzed the performances for static and dynamic power allocation (PA) and outage probability. Simulation results showed the improved performance of zero biased based NOMA VLC. NOMA achieves average rate greater than 10Mbps, SE outperformed by 2 bits/sec/Hz and EE improved by 0.4 × 107 bit/Joule compared to OFDMA. NOMA system achieved BER of 10-5 at signal to noise ratio (SNR) of about 21dB. The dynamic PA scheme reduces outage probability from 1 to 0.5 compared to static PA especially for the far user target rate of 35-60 Mbps.

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2020

S. M Kumari, Dr. Navin Kumar, and Prasad, R., “Performance of mmWave Ray Tracing Outdoor Channel Model Exploiting Antenna Directionality”, in 2020 IEEE 3rd 5G World Forum (5GWF), Bangalore, India, 2020.[Abstract]


The millimeter (mmWave) 5G new radio (NR) aims to provide orders of magnitude greater capacity through increased bandwidth and beamforming assisted narrow beam transmissions. The assumption of directional antennas with narrow radiating beams will reduce the number of contributing multipaths causing the channel to be sparser and simpler than the omnidirectional microwave channel. In this paper, we used a custom ray tracing model to study the behavior of directional mmWave urban micro (UMi) street canyon (SC) links. The proposed channel model harnesses the higher attenuation in high frequency mmWaves and the spatial filtering of directional antennas to reduce ray tracing complexity. The potential of this low complexity model has been evaluated through comprehensive simulation for both line of sight and non-line of sight mmWave communications at ranges up to 200m with different transmitter and receiver geometries. The impact of crossroad gaps on channel performance in a real urban SC 5G outdoor network design is also formulated. Several interesting insights have been derived. The strength of the proposed model constitutes path loss predictions at varying positions, frequency, and street orientation with/ without sidewall discontinuities.

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2020

P. D. F. Mahesh Kum Jha, Dr. Navin Kumar, and Lakshmi, Y. V. S., “NOMA MIMO Visible Light Communication with ZF-SIC and MMSE-SIC”, in 2020 2nd PhD Colloquium on Ethically Driven Innovation and Technology for Society (PhD EDITS), Bangalore, India, India, 2020.[Abstract]


Non orthogonal multiple access (NOMA) is used to maintain the throughput and fairness in communication system. It is also investigated in context of visible light communication (VLC). The bit-error-rate (BER) and channel performance like important parameters are improved by using equalizer. In this paper, NOMA multiple input multiple output (MIMO) based VLC system is analyzed using zero forcing equalizer with successive interface cancellation (ZF-SIC) and minimum mean square error (MMSE) equalizer with successive interface cancellation (MMSE-SIC) to enhance BER performance. Simulation results showed that MMSE-SIC improves BER by 3dB of signal-to-noise ratio (SNR).

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2020

L. H and Dr. Navin Kumar, “Blind Frequency Synchronization for WLAN MIMO OFDM Systems”, in 2020 2nd PhD Colloquium on Ethically Driven Innovation and Technology for Society (PhD EDITS), 2020.[Abstract]


In the current paper, we have developed a new frequency offset estimation algorithm using cyclic prefix (CP) without using the training sequence. specifically for wireless local area network (WLAN) systems typically operating at 5 GHz radio frequency (RF) band such as IEEE 802.11 class of standards like 11a, 11g, 11n, 11ac and more recent one such as 11ax which is yet to be ratified, And are built on multiple input multiple output (MIMO) orthogonal frequency division multiplexing (OFDM). Rayleigh fading effects are applied in addition to additive white gaussian noise (AWGN) to analyze the performance. The algorithm performance is prevailed in all the MIMO configurations proposed for (2×2), (3×3) and (4×4). Also, it is observed that the mean square error improves as the configuration increase.

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2020

R. Tengshe and Dr. Navin Kumar, “Preliminary investigation on Analog Joint Source Channel Coding and Feedback based Communication System”, in 2020 2nd PhD Colloquium on Ethically Driven Innovation and Technology for Society (PhD EDITS), Bangalore, India, India, 2020.[Abstract]


Joint source channel coding for transmission of continuous amplitudes in discrete-time is found to be suitable for the noisy channel.Similarly, analog feedback based communication system (AFCS) is found to have an optimized channel capacity by reaching theoretical value. In this work, preliminary investigation on these two systems is carried out.We compared these systems based on optimum performance theoretically attainable (OPTA). It is found that AFCS reaches the OPTA more closely in a higher signal-to-noise ratio (SNR) regime when the feedback noise variance is low i.e the quality of the feedback channel is good. Whereas the joint source channel coding technique is found to have a constant increment below the OPTA with respect to SNR.

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2020

A. Debnath and Dr. Navin Kumar, “Simple Additive Weighted Algorithm for Vertical Handover in Heterogeneous Network”, in 2020 2nd PhD Colloquium on Ethically Driven Innovation and Technology for Society (PhD EDITS), 2020.[Abstract]


5G mobile communication is not only promising very high data rate but ubiquitous connectivity and very small latency along with many other extreme performance parameters. Additionally, 5G is also expected to provide seamless connectivity to the users and ensure smooth handover across heterogeneous networks. There are various decision-making algorithms to carry out the handover process. The paper describes the simple additive weighting algorithm to select the best network for handover.

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2019

P. S and Dr. Navin Kumar, “EVM measurements for a 28GHz 5G Receiver link with the designed LNA and Down converter”, in 4th International Conference on Microelectronics, Computing and Communication Systems (MCCS) , BSNL Ranchi, 2019.

2019

S. Kumari M., Rao, S. A., and Dr. Navin Kumar, “Modeling and Link Budget Estimation of Directional mmWave Outdoor Environment for 5G”, in 2019 European Conference on Networks and Communications (EuCNC), Valencia, Spain, 2019.[Abstract]


Narrow pencil beamforming is a key enabling technique for millimeter wave (mmWave) systems to achieve high link quality. Employing highly directional narrow beam antennas will deliver unique requirements on mmWave channel modeling. In this paper, we propose a low complexity mmWave channel model to analyze the performance of line of sight (LOS) and non-line of sight (NLOS) directional outdoor links in several reference cases. This ray tracing based model integrates the antenna geometry of a highly directional antenna in 3D plane. The effects of specific attenuation and foliage losses are also incorporated to enhance the model accuracy. Simulation results show that the deterministic channel fading gain varies as a function of antenna location, height and beamwidth in addition to its variations against distance. The model is validated against standard channel models and measurements, at frequencies and deployment scenarios reported in the literature. Furthermore, link budget estimates and signal-to-noise ratio (SNR) results are evaluated. The proposed model, unlike many other models, describes the channel for any mmWave frequency, antenna beamwidth, transmitter/receiver height and location by just changing these parameters in the simulator. The study highlights the need to integrate directional antenna effects and deployment parameters in the channel model to have accurate performance predictions.

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2019

R. Tengshe and Dr. Navin Kumar, “Receive Diversity in Analog Feedback Communication”, in 2019 PhD Colloquium on Ethically Driven Innovation and Technology for Society (PhD EDITS), Bangalore, India, 2019.[Abstract]


The work explores the architecture and performance of Analog Feedback Communication System (AFCS) with spatial diversity in receiver. Based on optimizing the mean square error (MSE) of estimate, AFCS system with diversity improves the power bandwidth efficiency, and reduces the MSE. Also less number of iterations are needed to achieve desired MSE when compared to single channel AFCS.

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2019

M. Kumar Jha, Dr. Navin Kumar, and Lakshmi, Y. V. S., “Flip-OFDM Based Generalized Spatial MIMO for VLC”, in 2019 PhD Colloquium on Ethically Driven Innovation and Technology for Society (PhD EDITS), Bangalore, India, 2019.[Abstract]


Today's visible light communication (VLC) is popular area in of optical wireless for indoor applications. In this paper, generalized spatial modulation multiple-input multiple-output (generalized SM MIMO) technique is analyzed using flip orthogonal frequency division multiplexing (F- OFDM) to optimize VLC performance. The F-OFDM is used to obtain unipolar signal in VLC. The F-OFDM is compared with DC offset optical OFDM (DCO OFDM) and asymmetrically clipped optical OFDM (ACO OFDM) for generalized SM MIMO technique. The performance of bit error rate (BER) is analyzed in regard with signal to noise ratio (SNR). Simulation results shows that F-OFDM gives better performance.

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2019

A. Nawandhar, Dr. Navin Kumar, and Yamujala, L., “Performance Analysis of Neighborhood Component Feature Selection for Oral Histopathology Images”, in 2019 PhD Colloquium on Ethically Driven Innovation and Technology for Society (PhD EDITS), Bangalore, India, 2019.[Abstract]


Precise feature selection leads to improved accuracy in automatic oral cancer detection using digital Hematoxylin and Eosin (H&E)-stained histopathology images of oral squamous cell carcinoma. In this work, we have used neighborhood component analysis (NCA) feature selection technique with stochastic gradient descent based feature weight estimator. To verify the efficiency of the feature selection technique and independency of choice of classifier, three well known classifiers are used. The histopathology images of oral mucosa are classified using selected features. It has been observed that misclassification rate is reduced considerably after feature selection is employed.

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2019

S. Pournamy and Dr. Navin Kumar, “RF Budgeting and Planning for WiGig and its Co-existence with quasi mmWave Radio”, in 2019 PhD Colloquium on Ethically Driven Innovation and Technology for Society (PhD EDITS), Bangalore, India, 2019.[Abstract]


Radio Frequency (RF) budgeting and planning for the indoor WiGig, 802.11ad receiver is carried out in this paper. The coexistence of this radio with 5G cellular in quasi mmWave (24.25-29.5GHz) is also studied. Spurious frequencies and its power levels are identified for this scenario.

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2019

M. Kumari, Rao, S., and Dr. Navin Kumar, “Deterministic Modeling for mmWave Outdoor Street Canyon Channel”, in 2019 PhD Colloquium on Ethically Driven Innovation and Technology for Society (PhD EDITS), 2019.[Abstract]


The millimeter wave (mmWave) bands, a promising resource for 5G systems, suffer considerable attenuation over distance which can be mitigated by employing directional antennas with narrow beams. As 5G awaits standardization, it is vital to develop models that effectively describe the unique mmWave channels. In this paper, a custom ray tracing based directional deterministic mmWave outdoor channel model is presented. The bit error rate performance is analyzed and compared with those for both AWGN and independent and identically distributed (iid) Rayleigh fading channels. It is observed that the channel impacts differently for vertical and horizontal polarizations when the receiver is located at a closer distance from the transmitter, whereas the performance is comparable for large separation distances. This study is significantly important for effective system level simulations.

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2019

T. Sri Sai Apoorva and Dr. Navin Kumar, “Design of mmWave Dual Band Antenna for 5G Wireless”, in 2019 IEEE International Conference on Advanced Networks and Telecommunications Systems (ANTS), Goa, India, 2019.[Abstract]


In this paper, design work of dual band millimeter wave (mmWave) frequency antenna for 5G wireless technology is presented. The microstrip low profile patch antenna radiates at center frequency of 27.5GHz and 35.7GHz with respective gain of 6.267dB and 8.391dB. The antenna has larger bandwidth of 3.3GHz in the lower band and 3.5GHz at the higher band. The overall dimension of the patch is 12.5 x 10.1mm2. Additional patches are included and structural modification is performed in the basic design to improve the overall performance. The relative permittivity of dielectric is 2.2 and substrate is RT Duroid 5880 with a thickness of 0.87mm. Simulation is performed using applied wave research (AWR) design environment.

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2019

K. M. Jha, Dr. Navin Kumar, and Lakshmi, Y. V. S., “Generalized spatial modulation for multi-user in visible light communication”, in 2019 28th Wireless and Optical Communications Conference, WOCC 2019 - Proceedings, 2019.[Abstract]


In this paper, we analyzed the generalized spatial modulation (generalized SM) transmission technique for multi user indoor visible light communication (VLC) system. In generalized SM, number of bits conveyed per transmitter includes modulation symbol bits and active transmitter indices bits. Block diagonalization (BD) precoding technique is used to avoid multi user interference (MUI) in the transmitter without interference between photodiodes of the same user resulting in the noise reduction. A comparison is performed between the generalized SM with conventional Multiple Input Multiple Output (MIMO), spatial multiplexing (SMP) MIMO and spatial modulation MIMO transmission technique for multi user VLC system with regard to bit error rate (BER) performance using simulation. Simulation results show that generalized SM MIMO technique offers better signal to noise ratio (SNR) than SM MIMO by 2 dB, SMP MIMO by 5 dB and conventional MIMO technique by 8.5 dB to achieve the same BER of 10-6. We also analyzed the influence of field of view (FOV) at an optical receiver on SNR performance with respect to single light emitting diode (LED) power. © 2019 IEEE.

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2019

R. Tengshe, Dr. Navin Kumar, and Platonov, A., “Equal gain combining technique in analog feedback communication system”, in Proceedings of the 2019 IEEE International Conference on Communication and Signal Processing, ICCSP 2019, 2019, pp. 823-828.[Abstract]


This work explores and analyzes the analog feedback communication system (AFCS) architecture and its performance with equal gain combining (EGC) technique. AFCS system reaches the Shannon capacity limit which is not obtained in the most popular and widely used digital communication systems. AFCS system in its basic form consists of a forward link and a dedicated feedback channel and uses mean square error (MSE) as performance parameter which results in optimum performance. In this work, AFCS with receiver diversity, specifically EGC is studied and investigated. AFCS system model is developed, its performance is investigated and studied based on MSE calculation. The analysis showed that the AFCS system with diversity has improved the MSE and power bandwidth efficiency. Furthermore, with EGC desired MSE can be achieved in less number of iterations. Additionally, analysis showed that using optimized AFCS, bit rate which is equal to the capacity of the forward channel is achievable if analog sample is transmitted in threshold number of cycles. © 2019 IEEE.

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2019

V. K. Reddy and Dr. Navin Kumar, “Wavelet based analysis of EEG signal for detecting various conditions of driver”, in Proceedings of the 2019 IEEE International Conference on Communication and Signal Processing, ICCSP 2019, 2019, pp. 616-620.[Abstract]


In this paper, driver's drowsiness related conditions are detected using Discrete Wavelet Transform (DWT) from the ElectroEncephaloGram (EEG) signal (0.1 - 100 Hz) collected from the brainsense headset. Data is collected by mounting the headset on driver's head on various sessions of a day i.e., during morning, afternoon, night and when a high beam torch is focused into eyes of a driver. The obtained data sets record length is of 23.6 seconds and sampled at 173 samples/second. From the EEG signal; alpha, delta and theta waves ranging between 0.1 to 12Hz is extracted using various levels of DWT decomposition technique. This helps in detecting various conditions such as unconsciousness, drowsiness, dreaming state. An algorithm based on DWT and Support Vector Machine (SVM) classifier is developed to detect the various conditions, purely based on eye state analysis of a driver. This is then tested with 20 eyes opened and 20 eyes closed datasets where each data set record length are of 4097 samples. A 95% of accuracy is obtained from the developed algorithm. © 2019 IEEE.

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2018

P. Arunachalam and Dr. Navin Kumar, “Visible Light Communication and Radio Network for Vehicular Environment”, in 2018 Second International Conference on Advances in Electronics, Computers and Communications (ICAECC), Bangalore, India, 2018.[Abstract]


Visible Light Communication (VLC) technology is an emerging technology which promises to offer high data rate, last mile solution, ubiquitous communications, and relief to the most congested radio frequency RF system. Recently, VLC has drawn the attention of researchers around the globe and they are still exploring the applications and services which can be offered by this technology. In this work, a conceptual architecture of hybrid technology that is, VLC with RF is presented and discussed for vehicular environment. The idea is to provide relief to RF spectrum by using downlink signal with VLC technology and uplink transmission using RF. This RF could be a cellular system and/or wireless local area networks (WLAN) working as road side unit (RSU). Analysis is presented to show the VLC system would offer ubiquitous communication on road throughout the driving while illuminating road for the safe drive. Through simulation results, it is shown that the system offers high data rate in the downlink. However, for the uplink, road side units from RF technology based system offer the access to data services.

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2018

S. Singh and Dr. Navin Kumar, “Design of Wideband Millimeter Wave Mixer in CMOS 65nm for 5G Wireless”, in 2018 International Conference on Advances in Computing, Communications and Informatics (ICACCI), Bangalore, India, 2018.[Abstract]


In this paper, we present design of wideband 5G millimeter wave (mmWave) down conversion mixer with improvement in noise figure (NF) and linearity (IIP3). The proposed mixer uses an active load in the bias network which offers high linearity and acceptable conversion gain (CG). In addition, we used transimpedance amplifier (TIA) as intermediate frequency (IF) buffer in the design to further improve the linearity. The proposed circuit is designed and simulated in UMC 65nm technology. Simulation results shows a 13.7 ±0.5 dB conversion gain, 5.9±0.4 dB noise figure and 11.78±1.75 dBm IIP3 over the wide mmWave band from 32 GHz to 65 GHz.

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2018

S. Pavan Kart Sunkara and Dr. Navin Kumar, “Analysis and Classification of Railway Track Surfaces based on Image Processing”, in 2018 International Conference on Advances in Computing, Communications and Informatics (ICACCI), Bangalore, India, 2018.[Abstract]


Railway track monitoring, especially from a remote location is difficult task which is currently carried out manually in many countries. However, if real time monitoring is performed, it would save huge loss of materials and lives of people. In addition, the system would notify for warning and immediate attention for maintenance to prevent any future such loss because of derailment. This paper describes image processing based real time monitoring of the condition of railway tracks in remote location. The developed algorithm uses image processing to analyze, classify, categorize and estimate the surface of the railway track and the intensity of the issues like deformation, crack and gap associated with it. The proposed algorithm also estimates various details regarding the track surface issues and the same can be transmitted to the nearest railway station on regular basis. Based on the received information, the remedial actions can be initiated and undertaken to avoid catastrophic accidents that cause many lives and huge damage of material.

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2018

K. Bhavya, Gangrade, N., and Dr. Navin Kumar, “Simplified Integration of Power Line and Visible Light Communication”, in 2018 3rd International Conference on Communication and Electronics Systems (ICCES), Coimbatore, India, 2018.[Abstract]


This paper presents the simplified integration techniques of power line communication (PLC) and visible light communication (VLC). System level model of integrated frequency shift keying (FSK) narrowband PLC and VLC is developed and simulated. Two different techniques are developed for the integration without the use of demodulating the PLC modulated signal. In the first technique, we used a multiplier which gives out an on off keying (OOK) signal to drive the VLC emitter. In the second method, a simple logic is developed to convert the FSK modulated signal from PLC to obtain OOK signal. It is found that the model is able to integrate both PLC and VLC using these techniques and do not need whole process of demodulating the PLC modulated signal and again modulating the signal using different scheme for VLC emitter.

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2018

V. R. Karna and Dr. Navin Kumar, “Determination of Absolute Heart Beat from Photoplethysmographic Signals in the Presence of Motion Artifacts”, in Proceedings of 2018 2nd International Conference on Advances in Electronics, Computers and Communications, ICAECC 2018, 2018.[Abstract]


In Wireless Body Area Networks (WBANs), accurate monitoring of heart rate (HR) using Photoplethysmography (PPG) signals is always a difficult task, especially when the subjects are under radical exercises. This is due to the signals corrupted by severely strong Motion Artifacts (MA) caused by the subject's body movements. In this work, a novel approach has been proposed consisting of signal decomposition for denoising using principal component analysis (PCA), spare signal reconstruction (SSR), peak detection and tracking and support vector machine (SVM) classifier for accurate estimation of HR, based on the wrist type PPG signals. With this approach, we are able to achieve high accuracy and also, it is strong enough to remove MA. Experiments were conducted on 12 subjects and their datasets are obtained from 2015 IEEE Signal Processing CUP, running on a threadmill with varying speeds ranging from 0 to a maximum speed of 15 km/hour. From the results, it is observed that the average absolute error of heart rate estimation is 1.66 beats per minute (BPM). © 2018 IEEE.

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2018

S. Raman, V. Vignesh, and Dr. Navin Kumar, “Design and Implementation of Quadrature Voltage Controlled Oscillator in 65nm CMOS”, in 7th IEEE International conference on Advances in Computing, Communications and Informatics (ICACCI), PES Institute of Technology, Bengaluru, South campus, India, 2018.

2018

R. Kumari, V. Vignesh, and Dr. Navin Kumar, “Wideband Low Noise Amplifier Design for Microwave Frequency using CMOS 65nm technology”, in 7th IEEE International conference on Advances in Computing, Communications and Informatics (ICACCI, PES Institute of Technology, Bengaluru, South campus, India, 2018.

2018

M. K. Jha, Dr. Navin Kumar, and Lakshmi, Y. V. S., “Performance analysis of transmission techniques for multi-user optical MIMO pre-coding for indoor visible light communication”, in Proceedings of the 2017 International Conference on Wireless Communications, Signal Processing and Networking, WiSPNET 2017, 2018, vol. 2018-January, pp. 1794-1798.[Abstract]


In this paper, we analyzed different transmission techniques of multi-user visible light communication (VLC) system. Block diagonalization technique is used to avoid multiuse interference (MUI) in the transmitter. In addition, repetition coding (RC) and spatial modulation (SM) transmission techniques are used in this research work. We have analyzed the bit error rate (BER) performance for both of these transmission techniques. Furthermore, the BER performance with respect to light emitting diode (LED) i.e., the VLC emitter power is also considered. The simulation results show that the SM offers better performance especially at low signal to noise ratio (SNR). © 2017 IEEE.

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2017

T. K. A. C. Snehalatha and Dr. Navin Kumar, “Design of multiband planar antenna for mobile devices”, in 2017 International conference on Microelectronic Devices, Circuits and Systems (ICMDCS), Vellore, India, 2017.[Abstract]


In this paper, three designs of planar antenna is presented. These low profile planar antennas can be used within widely used bands of frequencies that is, between 800MHz to 9GHz (10 bands) of all cellular from 2G to 4G and beyond. In addition, the coverage frequency includes wireless local area networks (WLAN) and WiMax. Significant structural changes are made in one of the latest structure of multiband antenna which is a combination of L-type, C-type and inverted F-type. All of the bands showed the gain of over 2dB and significant S11 parameters of below -10dBm. Additionally, all of them have significant 3-dB bandwidth. The changes in structure further improved bandwidth, gain for some of the bands. With coupled-fed mechanism and a slotted ground structure, we obtain multiband and wideband characteristics. The influences of the modifications introduced into the ground plane as well as structure of all types of antenna, improved the bandwidths significantly. The design structure is presented, simulated results of radiation pattern, the gains, S11 parameters and results are discussed. The obtained results can meet the requirements of practical mobile phones.

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2017

S. Pournamy and Dr. Navin Kumar, “Design of 60GHz broadband LNA for 5G cellular using 65nm CMOS technology”, in 2017 7th International Conference on Communication Systems and Network Technologies (CSNT), Nagpur, India, 2017.[Abstract]


In this paper, 60GHz millimeter wave (mmWave) two stage common source (CS) cascode low noise amplifier (LNA) with degenerative inductor is designed in 65nm CMOS technology. It has a wide band (57-64GHz) and highly stable characteristics. We have also proposed two different techniques to design the LNA unconditionally stable and increase its linearity without degrading other performancemetrics. Simulation results of a two stage LNA without the stability improvisation show a peak gain of 24.5dB at 61GHz, input return loss of -9.1dB, noise factor (NF) of 1.5dB, static power dissipation Pdc of 6.63mW and is conditionally stable. In one of the methods of designing LNA unconditionally stable is to reduce the gain to 19.5dB by incorporating an additional inductor at the source of second stage amplifier. Linearity is also increased to P1dB of -2.44dBm without degradation of other parameters. Another approach is to maintain the peak gain greater than 22dB by increasing the transconductance of the CMOS transistors. This increases the return loss to -14.5dB. Various obtained results are presented and discussed.

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2017

T. K. A. C. Snehalatha and Dr. Navin Kumar, “Design of multiband planar antenna”, in 2017 IEEE International Conference on Antenna Innovations Modern Technologies for Ground, Aircraft and Satellite Applications (iAIM), Bangalore, India, 2017.[Abstract]


In this paper, a low profile planar antenna for most of the used bands between 800MHz to 9GHz (10 bands) is designed. The antenna structure comprises L-type, C-type and inverted F-type. All of the bands showed the gain of over 2dBi and significant S11 parameters of below -10dBm. Additionally, all of them have significant 3-dB bandwidth. The technique used in this study ensured that by using a coupled-fed mechanism and a slotted ground structure, a multiband operation with wideband characteristic can be achieved. The influences of the modifications introduced into the ground plane as well as structure of all types of antenna, improved significantly the bandwidths of the designed antenna. We have presented the simulated results of radiation pattern, the gains, S11 parameters and discussed the results. The results observed can meet the requirements of practical mobile phones.

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2017

A. A. Nawandhar, Yamujala, L., and Dr. Navin Kumar, “Performance Analysis of Image Segmentation for Oral Tissue”, in 2017 Ninth International Conference on Advances in Pattern Recognition (ICAPR), Bangalore, India, 2017.[Abstract]


Digital image segmentation is the first step in computer aided diagnostic procedures which are carried out with the help of medical images in the medical field. In this paper, segmentation of Hematoxylin and Eosin (H&E)-stained microscopic image of stratified squamous epithelial layer of oral cavity to separate the squamous cells from the background is performed by different approaches. Due to the complex structure of the squamous epithelial layer, the widely used K-means clustering and thresholding techniques are either not suitable for segmenting such images or unable to furnishthe suitable result. In this work, we are proposing new method for segmentation using Gabor filter. The input image is filtered through a bank of Gabor filters. The number of scales used in constructing the bank of filters is adaptive and automatically computed based on the size of the image. Filtered outputs are taken as 2-dimentional feature vectors. Furthermore, principal component analysis is performed to reduce the dimensionality. In addition, the first principal component is used as the feature image for further processing towards segmentation. This feature image is given as input to both the K-means clustering and thresholding for the final segmentation. The outputs of different approaches are compared. It is found that Gabor filter with thresholding and K-means clustering offers improved result as compared to the conventional ones.

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2016

S. N. Vaniya, Dr. Navin Kumar, and Sacchi, C., “Performance of iterative turbo coding with nonlinearly distorted OFDM signal”, in 2016 IEEE Annual India Conference, INDICON 2016, 2016.[Abstract]


In this paper, the performance of iterative turbo coding with nonlinearly distorted orthogonal frequency division multiplexing (OFDM) signal is analyzed. System level implementation in Simulink is performed and bit error rate (BER) performance is analyzed. Initially, we have implemented both, the series turbo coder and iterative turbo coder, compared the performance and then using better performed iterative coder, model is implemented in Simulink. In the model, we introduced highly nonlinear distortion signal using solid state power amplifier (SSPA). It is observed that nonlinear distortion results in very high BER. However, BER performance is significantly improved by the use of iterative turbo coder. It is also seen that 6 iterations is found to be optimum. Higher or smaller iteration results in reduced performance. © 2016 IEEE.

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2015

N. B. Gowda, Sharma, R., Dr. Navin Kumar, and Srinivas, T., “Dynamic benefit-weighted scheduling scheme in multi service networks”, in 2015 IEEE International Advance Computing Conference (IACC), Banglore, India, 2015.[Abstract]


This paper proposes a new dynamic packet scheduling scheme which guarantees the delay and jitter properties of differentiated services (DiffServ) network for both real time and non-real time traffics. The proposed dynamic packet scheduling algorithm uses a new weighted computation scheme known as dynamic benefit weighted scheduling (DB-WS) which is loosely based on weighted round robin (WRR) or fair queuing policy. The novelty of this scheduler is that it predicts the weight required by expedited forwarding (EF) service for current time slot (t) based on two factors: (i) previous weight allocated to it at time slot (t-1), and (ii) average increase in weights of EF traffic in consecutive time slots. This prediction provides smoother and balanced bandwidth allocation to EF, assured forwarding (AF) and best effort (BE) packets by not allocating all the resources to EF and also ensuring minimal packet losses for EF service. Adopting such a dynamic resource allocation effectively achieves reduction in packet loss, end to end delay and delay jitter. The algorithm is tested with different data rates and found to outperform other existing methods in terms of packet loss and end to end delay.

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2015

R. Sharma, Dr. Navin Kumar, Gowda, N. B., and Srinivas, T., “Waiting Time Analysis for Delay Sensitive Traffic in Internet of Things”, in 2015 IEEE Region 10 Symposium, Ahmedabad, India, 2015.[Abstract]


In this paper, waiting time analysis for the delay sensitive traffic especially in Internet of things (IoT) is performed. The analysis is based on probabilistic prediction approach for providing Quality of Service (QoS). A dynamic packet scheduling scheme is considered to provide service differentiation and preferential treatment to delay sensitive traffic. The scheduler focuses on reducing the waiting time of high priority delay sensitive services in the queue and simultaneously keeping medium and low priority services within tolerable limits. The scheme uses the difference in probability of average queue length of high priority packets at previous cycle and current cycle to determine the probability of average weight required in the current cycle. This offers optimized bandwidth allocation to all the services. The performance of the algorithm is investigated using MPEG-4 traffic traces under different system loadings. The results show the improved performance with respect to waiting time for scheduling high priority packets.

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2015

A. A and Dr. Navin Kumar, “Illumination, Indoor Localization and Very HighSpeed Data Communication using VLC”, in IEEE WirelessVitae, 2015.

2015

Ra Sharma and Dr. Navin Kumar, “QoS-alert Markov chain based scheduling scheme in internet of things”, in 2015 IEEE Globecom Workshops, GC Wkshps 2015 - Proceedings, 2015.[Abstract]


Guaranteeing quality of service (QoS) to transmit real time applications which are delay sensitive is of utmost importance in Internet of Things (IoT) environment. This paper presents a dynamic Markov Chain based scheduling scheme for ensuring QoS for the delay sensitive traffic in IoT. The traffic is classified into prioritized and non- prioritized traffic. By estimating previous bandwidth allocated to prioritized traffic and the amount of decrease/increase in probability of average queue length of prioritized packets in consecutive cycles, the scheduler dynamically adjusts the percentage of link bandwidth allocated to it in each cycle. This helps in providing guaranteed services to real time traffic in IoT applications and simultaneously provide better throughput for non real time traffic as well. The proposed QoS- alert scheduling mechanism is able to optimize the desired performance in IoT network. For different experiments the simulation is performed which verifies and satisfies the blocking probability requirements of prioritized traffic for IoT data. © 2015 IEEE.

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2015

A. Aa Nawandhar, Yamujala, Lb, and Dr. Navin Kumar, “Image segmentation using thresholding for cell nuclei detection of colon tissue”, in 2015 International Conference on Advances in Computing, Communications and Informatics, ICACCI 2015, 2015, pp. 1199-1203.[Abstract]


In this paper, image segmentation process using thresholding technique is discussed. We focus our study for nuclei detection of Hematoxilin Eosin (HE) stained colon tissue for the cancer detection. Detection of cancer cell at early stage is very important and several studies are being carried out. In medical imaging for the processing of microscopic tissue images and especially the detection of cell nuclei is done more and more using digital imagery techniques. However, there are many other techniques varies in complexity and quality of detection. In this paper the result of different thresholding techniques are applied on HE-stained colon tissue to detect cell nuclei in the image. In the proposed method, a binary mask is formed which is of the same size as that of original image. In this binary image, the centre of cell nuceli is represented by white colour and the background in black. This image is superimposed over the original image. The outcome of this is a segmented image to detect the cell nuclei. The process is relatively simple and results are encouraging. © 2015 IEEE.

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2015

MaSheeba Kumari, Rao, S. Ab, and Dr. Navin Kumar, “Characterization of mmWave link for outdoor communications in 5G networks”, in 2015 International Conference on Advances in Computing, Communications and Informatics, ICACCI 2015, 2015, pp. 44-49.[Abstract]


A number of issues are being addressed in prospective millimetre wave (mmWave) technology for the design of 5G cellular networks. High atmospheric attenuation in the proposed 60GHz band for 5G system put a limit in the communication range and cell size. The channel characteristics may vary for many different indoor and outdoor scenarios, resulting in differing performance. In this paper, an attempt is made to investigate and characterize the mmWave communication link in a specific scenario of urban area on road surrounded by multistorey buildings. Average received signal level in this scenario is normally the primary metric considered. A ray tracing channel model is used owing to the deterministic nature of the link. This is due to the choice of directional antennas in mmWave communication. A significant fluctuation in the received signal is observed for varied carrier frequencies at different antenna separation. © 2015 IEEE.

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2015

M. Ka Jha, Addanki, Ab, Lakshmi, Y. V. Sc, and Dr. Navin Kumar, “Channel coding performance of optical MIMO indoor visible light communication”, in 2015 International Conference on Advances in Computing, Communications and Informatics, ICACCI 2015, 2015, pp. 97-102.[Abstract]


In this paper, a visible light communication (VLC) in the indoor environment based on MIMO system is investigated and analyzed. An attempt is made to optimize the placement of light emitting diodes (LED) VLC emitter in 4 × 4 MIMO configuration at ceiling and ground floor for the receiver to obtain uniform signal-to-noise ratio (SNR) for the desired bit error rate (BER) in the given area. The system is also optimized for the necessary power transmission from LED emitters for the maximum data rate. Two channel coding techniques repetition code (RC) and spatial modulation (SM) are analyzed and their BER and data rate performance results are presented for different receiver spacing moving in the entire area. The result shows that RC gives almost constant SNR whereas SM offers better SNR ratio for more spacing between receivers. In the case of SM, only one transmitter will transmit at a time. So the SNR value will be very low at other corner of the room. © 2015 IEEE.

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2014

R. Sharma, Dr. Navin Kumar, and Talabattula, S., “Performance of new dynamic benefit-weighted scheduling scheme in DiffServ networks”, in 2014 International Conference on Advances in Computing, Communications and Informatics (ICACCI), Delhi, India, 2014.[Abstract]


In this paper, we design a new dynamic packet scheduling scheme suitable for differentiated service (DiffServ) network. Designed dynamic benefit weighted scheduling (DBWS) uses a dynamic weighted computation scheme loosely based on weighted round robin (WRR) policy. It predicts the weight required by expedited forwarding (EF) service for the current time slot (t) based on two criteria; (i) previous weight allocated to it at time (t-1), and (ii) the average increase in the queue length of EF buffer. This prediction provides smooth bandwidth allocation to all the services by avoiding overbooking of resources for EF service and still providing guaranteed services for it. The performance is analyzed for various scenarios at high, medium and low traffic conditions. The results show that packet loss is minimized, end to end delay is minimized and jitter is reduced and therefore meet quality of service (QoS) requirement of a network.

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2014

M. Anand and Dr. Navin Kumar, “New, Effective and Efficient Dimming and Modulation Technique for Visible Light Communication”, in 2014 IEEE 79th Vehicular Technology Conference (VTC Spring), Seoul, Korea (South), 2014, vol. 2015-January.[Abstract]


Dimming control function in light emitting diodes (LED) based visible light communication (VLC) is not only important but challenging too. Many interesting techniques are being investigated for different application scenarios. In this paper, an attempt is made to design a new and effective dimming control mechanism which is adaptive as per environmental condition to address successful data communication in case of infrastructure to vehicular (I2V) or vehicle to vehicle (V2V) or vehicle to infrastructure (V2I) mode of communication in intelligent transportation systems (ITS). We developed pulse dual slope amplitude modulation (PDSAM) to address both flickering and dimming in VLC system and combines the properties of slope and amplitude variation resulting in improved bit error rate (BER) performance.

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2013

Dr. Navin Kumar, “Smart and intelligent energy efficient public illumination system with ubiquitous communication for smart city”, in INTERNATIONAL CONFERENCE ON SMART STRUCTURES AND SYSTEMS - ICSSS'13, Chennai, India, 2013.[Abstract]


The activities and researches in conceptualizing smart infrastructures around us are growing. Advancement in information and communication technology (ICT) in fact enables an entity or a system smart and intelligent. This paper discusses a concept towards developing a smart city using intelligent energy efficient public illumination system which would also offer ubiquitous communication. It discusses the usage of energy efficient intelligent illumination which can automatically adjust the intensity of lights depending on surrounding environment that are continuously monitored using sensor networks. The system is based on semiconductor light emitting diodes (LEDs) which are efficiently and effectively controlled. Furthermore, its inherent characteristic of high rate switching can be used for data communication enabling simultaneous use of illumination and communication. A case scenario of road illumination is also discussed and through simulation studies, it is reported that data communication at high rate is possible using the lighting infrastructures.

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2013

H. Lalitha, Sharma, R., and Dr. Navin Kumar, “Carrier frequency offset with I/Q imbalance analysis of fifth generation WiFi”, in 2013 International Conference on Advances in Computing, Communications and Informatics (ICACCI), Mysore, India, 2013.[Abstract]


The performance of the Orthogonal Frequency Division Multiplexing (OFDM) based systems degrades especially being sensitive to carrier frequency offset (CFO) and inphase and quadrature (I/Q) imbalance which destroys orthogonality between subcarriers. The IEEE 802.11ac (fifth generation) wireless local area network (WLAN) standard uses OFDM equally spaced subcarriers to transmit data, and the number of subcarriers signal depend on the bandwidth. In this paper, we investigate the system behaviour considering CFO and I/Q imbalance impairments. Our studies focus on two important non data aided algorithms. The results of analysis are presented for different subcarriers in combination with modulation and throughput.

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2013

R. Sharma, Lalitha, H., and Dr. Navin Kumar, “Design and development of non data aided estimation algorithm for carrier frequency-offset and I/Q imbalancing in OFDM-based systems”, in 2013 Tenth International Conference on Wireless and Optical Communications Networks (WOCN), Bhopal, India, 2013.[Abstract]


Orthogonal Frequency Division Multiplexing (OFDM) systems are particularly sensitive to carrier frequency offset (CFO) and Inphase and Quadrature (I/Q) imbalance. These parameters degrade the performance of OFDM-based system as they destroy the orthogonality between sub-carriers. In this paper, we designed an estimation algorithm which is based on non data aided technique for the CFO and I/Q imbalance by taking advantage of the inherent orthogonal structure in the OFDM signal. We particularly analyze the different standards of 802.11, the wireless local area network (WLAN) that are OFDM based to evaluate the performance of this algorithm. The simulation results show the improvement of new estimator over the existing one in the presence of I/Q Imbalance.

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2012

Dr. Navin Kumar, Lourenco, N., Terra, D., Alves, L. N., and Aguiar, R. L., “Visible light communications in intelligent transportation systems”, in 2012 IEEE Intelligent Vehicles Symposium, Madrid, Spain, 2012.[Abstract]


Emerging intelligent transportation systems (ITS) are based on several technologies. A new concept of integrating visible light communications (VLC) in ITS is introduced in this paper. VLC in ITS is a cost effective method of implementation. This paper presents a VLC broadcast system considering LED-based traffic lights. It discusses the integration of traffic light road side unit (RSUs) within the existing ITS architecture. A prototype demonstrator of the designed VLC systems is also presented. A robust modulation technique based on direct sequence spread spectrum (DSSS) sequence inverse keying (SIK) has been implemented to minimize the effect of noise sources. Experimental results show data communication range of over 40m with 200mm custom designed traffic light, even during bright sun light.

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2012

N. Lourenco, Terra, D., Dr. Navin Kumar, Alves, L. Nero, and Aguiar, R. L., “Visible Light Communication System for outdoor applications”, in 2012 8th International Symposium on Communication Systems, Networks Digital Signal Processing (CSNDSP), Poznan, Poland, 2012.[Abstract]


This paper presents a Visible Light Communication (VLC) system architecture suitable for outdoor applications. VLC usages in outdoor scenarios are facing new opportunities raised by the increasing trends on the usage of LEDs. Traffic light signals and public illumination systems are two application examples, where VLC can show its merits. These scenarios pose several challenges due to the fact that it is difficult to control environmental conditions. Thus, VLC systems able to operate under these conditions need to employ robust modulation schemes. This paper proposes the usage of direct sequence spread spectrum to combat noise and interference. The implemented prototype demonstrates that it is feasible to achieve more than 40m communication range for low data rate applications even in the presence of significant optical noise levels.

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2011

Dr. Navin Kumar, Terra, D., Lourenco, N., Alves, L. Nero, and Aguiar, R. L., “Visible light communication for intelligent transportation in road safety applications”, in 2011 7th International Wireless Communications and Mobile Computing Conference, Istanbul, Turkey, 2011.[Abstract]


This paper discusses the implementation of a light emitting diode based visible light communication system, for intelligent transportation in road safety applications. The signal processing of both, transmitter and receiver are realized in a field programmable gate array using two Spartan-3E development kits. The implemented modulation scheme is based on direct sequence spread spectrum techniques. The performance of the overall system is evaluated and results are presented. It is found that the system is well suited for traffic broadcast at low data rate and medium range. The simulation results also show that spread spectrum modulation techniques mitigate the effect of noise produced by ambient artificial light sources.

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2011

D. Terra, Dr. Navin Kumar, Lourenco, N., Alves, L. Nero, and Aguiar, R. L., “Design, development and performance analysis of DSSS-based transceiver for VLC”, in 2011 IEEE EUROCON - International Conference on Computer as a Tool, Lisbon, Portugal, 2011.[Abstract]


This paper addresses and implements a Direct Sequence Spread Spectrum (DSSS) transceiver for Visible Light Communication (VLC) systems based on FPGA. A transceiver was implemented including a transmitter capable of driving an array of light emitting diodes (LED) and a Pseudo-Noise (PN) matched decorrelator. The receiver architecture uses a discrete FIR correlator for data synchronization and acquisition. In this paper, a novel and simple PN code with a 10 bit sequence length is developed. This code offers a similar performance to the popular Barker code; however, it has a simple design. The used FPGA resources are presented along with a performance analysis.

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2009

Dr. Navin Kumar, Alves, L. Nero, and Aguiar, R. L., “Design and analysis of the basic parameters for traffic information transmission using VLC”, in 2009 1st International Conference on Wireless Communication, Vehicular Technology, Information Theory and Aerospace Electronic Systems Technology, Aalborg, Denmark, 2009.[Abstract]


This paper discusses system design considerations concerning the use of visible light communication (VLC) concepts in road traffic control systems. A simple traffic set-up model has been analyzed in order to optimize various important design parameters. This optimization is based on the gain variation over 100 m transmission range. This approach will help to specify the needed gain for the receiver in the complete set-up in order to further increase the coverage area. It will also allow important simplifications at the front-end design level.

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Publication Type: Book Chapter

Year of Publication Title

2020

K. Gayathri, B. Krishna, A., and Dr. Navin Kumar, “Design of Generalized Rational Sampling Rate Converter Using Multiple Constant Multiplication”, in International Conference on Communication, Computing and Electronics Systems: Proceedings of ICCCES 2019, V. Bindhu, Chen, J., and Tavares, J. Manuel R., Eds. Singapore: Springer Singapore, 2020, pp. 455–466.[Abstract]


In this paper, a multirate sampling filter is designed by using multiple constant multiplication (MCM). This is achieved by replacing the multipliers in generalized rational sampling rate converter (GRSRC) with codes derived from MCM algorithm. Using the existing generalized rational sampling rate converter structure, we achieved reduced computational complexity since the delay requirements are significantly reduced. However, in order to lower the cost of the hardware, we used a multiplierless approach. In addition, the area utilization of this modified structure has been seen to be significantly reduced in comparison to that of the unintegrated structure with a comparable trade-off in terms of the speed and power requirement. Simulink model is developed, and FPGA implementation is completed. It is seen that the computational performance and many other parameters are improved.

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2012

Dr. Navin Kumar, Nero, L. A., and Aguiar, R. L., “Employing Traffic Lights as Road Side Units for Road Safety Information Broadcasts, Chapter 6 of the book Roadside Networks for Vehicular Communications”, in Roadside Networks for Vehicular Communications: Architectures, Applications, and Test Fields, IGI Global, 2012.

2009

Dr. Navin Kumar and Aguiar, R. L., “The Visible Light Communication: A Promising Technology”, in IEC Annual Review of Communication 2009, vol. 61, IGI Global, 2009, pp. 118-135.

Publication Type: Conference Proceedings

Year of Publication Title

2020

V. KR and Dr. Navin Kumar, “Development of a Framework for Remote Health Monitoring”, Springer 5th International Conference on ICT for Sustainable Development (ICT4SD). Goa, 2020.

2018

S. Raman, V. Vignesh, and Dr. Navin Kumar, “Design of Quadrature Voltage Controlled Oscillator at 60GHz in 65nm CMOS”, 2018 International Conference on Advances in Computing, Communications and Informatics (ICACCI). IEEE, Bangalore, India, 2018.[Abstract]


In this paper, we present an analog design of tunable quadrature voltage-controlled oscillator (QVCO). The QVCO uses a cross coupled CMOS core with differential inductor with a capacitor bank to tune it around 60GHz range for 5G wireless technology solutions. It incorporates an in-phase injection circuit for coupling between the two oscillators. The proposed circuit is designed and simulated in UMC 65nm technology. Simulation results showed a tuning range of 55.5 to 62.9GHz and a worst-case phase noise of -99.26 to -97.29 dBc/Hz at 1MHz offset. The resulting figure-of-merit (FOM) comes to be -190.34 to -189.46 dBc/Hz at 1MHz offset and the corresponding FOM for tuning (FOMT) is -192.28 to -191.4 dBc/Hz at 1MHz offset.

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2009

Dr. Navin Kumar, Alves, L. Nero, and Aguiar, R. L., “Visible Light Communication for Advanced Driver Assistant System”, Conference on Telecommunication (ConfTele’09). Portugal, 2009.

2007

Dr. Navin Kumar, “Design Considerations for Multihop Relay Broadband Wireless Mesh Network”, Conference on Electrical Engineering (CEE -2007). 2007.

Publication Type: Book

Year of Publication Title

2019

Dr. Navin Kumar and Prasad, V., Ubiquitous Communications and Network Computing. Springer , 2019.

2017

Dr. Navin Kumar and Arpita Thakre, Ubiquitous Communications and Network Computing. Springer , 2017.

2005

Dr. Navin Kumar, Computer Organization. New Delhi – India: Galgotia Publication PVT LTD, 2005.

Research Grants Received

Year Funding Agency Title of the Project Investigators Status
2017 DST Design of mmWave Efficient TxRx architecture Ms Pournamy Under final report submission
2021 BEL MAC layer development for LiFi Navin Kumar Ongoing

Collaborative Research

Year Title & other details
2021 MAC Layer Development of LiFi for Indoor Solution, BEL
2020 Surface wave communication, Intel
2020 mmWave Channel Modeling, Aarhus University, Denmark
2019 Analog Feedback Communication System, Warsaw University of Technology, Poland
2016 Efficient Turbo Code for LTE, University of Trento

Keynote Addresses/Invited Talks/Panel Memberships

  1. Conducted Research Methodology workshop, Christ University, Pune, 26-27 Feb 2021
  2. Invited talk on “Evolution of Wireless and Cellular Communication”, during 2-day workshop on Material Science and Engineering, organized by Lingaya Vidyapeeth, Faridabad –UP, 22-23 February 2021.
  3. FDP on "Smart Technology Pillars for 5G and Beyond", organized by Sinhgarh Institute of Technology and Science, Pune, 22-28 January 2021.
  4. Invited talk on "UAV", during 6G Knowledge laboratory opening and 36th GISFI virtual Meeting, Aarhus university, Denmark, 21-22 December 2020.
  5. "Writing quality technical paper", organized by Samsung and Wipro Ltd, 05 December 2020
  6. "ETSI Reference architecture for Intelligent Transportation Systems (ITS)", during IEEE ComSoc workshop on ITS, 29 November 2020
  7. "5G New Radio", 6-day STTP - Visvakarma Institute of Information Technology, Pune - 21 October, 2020 
  8. “5G Enabling Technology and Millimeter Wave Design Challenges", AICTE Sponsored Short Term Training Programme on “Massive MIMO and Millimeter Wave MIMO Technologies for 5G Networks, Erode Sengunthar Engineering College, Erode, TN,  17 August 2020.
  9. "Authoring: quality research paper",  Authorship workshop,  Chirst University and Bangalore section, 29 August 2020
  10. "How to Write Quality Research Paper", Research Methodology and Authorship workshop, Karnataka Science and  Technology Academy, 19 August 2020
  11. "Peer Review: why and how", Research Methodology and Authorship Workshop, Karnataka Science and Technology Academy, 20 August, 2020
  12. "Authorship workshop", organized by KG Group of Institution, Chennai, 21 May 2020 (10am-1:30pm)
  13. "Research Methodology with a focus on Authoring Quality Technical Paper", 5-day National FDP on "research methodology" organized by IILM group of institution, Greater Noida, 14 May 2020 (3:30hrs session - 2200 participants)
  14. "5G use cases, applications and New Radio details", Organized by BIT in conjunction with IEEE Bangalore section, 22 May, 2020
  15. " Writing technical high quality journal", Repeat from IEEE ESCO webinar, 3rd May 2020.
  16. “How to Publish High Quality Journal”, IEEE ESCO Webinar, 19 & 24 April 2020 (3700 Participants)
  17. “Peer Review: Why and How”, Webinar, IEEE Bangalore Section, 14 April 2020
  18. “Research Methodology and AuthorshipLab”, Acharya Institute of Technology, Bangalore, 29 Feb, 2020
  19. “5GIF IEG Interim Report”, IMT 2020 WP5D #34, ITU, Geneva, 19-25 February, 2020
  20. “5G New Radio and for Future V2X”, Symposium on 5G and Beyond and 35th GSSM IIT(ISM) Dhanbad and BIT Ranchi, 8-9 February 2020
  21. “IEEE AuthorshipLab”, IEEE Bangalore Section one day workshop, UVCE Bangalore, 14 January 2020
  22. “5G Enabling Technologies”, FDP in Modern Wireless Technology, MSRIT Bangalore, 6 January 2020.
  23. “5G New Radio”, FDP at Malad College of Engineering, Hassan, 30 Nov 2019
  24. “Intelligent Transportation Systems (ITS) Architecture and Applications”, IEEE ComSoc 2nd Workshop on ITS with a focus to improve Bangalore Traffic, Wipro, Bangalore, 8 November 2019.
  25. “Role of TPC in Conference Organization”, IEEE workshop on Conference Organizers, Bangalore,10 October 2019
  26. ‘Research Methodology and Authorship Lab Workshop’, Christ University, Lavasa, Pune, 11-12 September 2019.
  27. ‘5G Enabling Technologies, Architecture and Channel Model’, TEQIP – Faculty Development Programme on Wireless Network-A Smart City Perspective at BMS College of Engineering from 17 to 21 Junuary, 2019.
  28. ‘Research Methodology and Authorship Lab Workshop’, during a week-long Faculty Development and Orientation Program organized at Coimbatore Institute of Technology, Coimbatore from 3rd to 4th Jun 2019.
  29. “Challenges in mmWave based Edge Computing for 5G”, Invited talk, CMRIT Bangalore, 30 Apr, 2019.
  30. “Edge Computing-Suitability of mmWave for 5G”, Invited talk, IEEE International Conference on ICoNDSC, Mar 1-2, 2019
  31. “Research Methodology and IEEE AuthorshipLab”, 13-14 Apr 2019 CMRIT Bangalore,
  32. “Research Methodology and IEEE AuthorshipLab”, 1-2 Feb, 2019 Krusti Jaynthi University, Bangalore.
  33. “Traffic Issues, Role of ITS and Challenges”,  IEEE Workshop on Intelligent Transportation Systems: how 5G will solve the Bangalore traffic problem,  23 Nov, 2018 Wipro, Bangalore
  34. “Edge Computing and Merging mmWave for 5G Wireless”, BITSAA International Connect, 9 Nov, 2018, Goa
  35. Panelist during Smart City IEEE workshop and lead the panel discussion on “eServices and Implementation challenges of these”, Bangalore, 16-17 Nov 2018.
  36. “Evolution of Mobile Cellular Systems and 5G Future Technology”, TEQIP Workshop on Recent Innovative Technologies in Communication, MCE, Hassan, 11 Oct 2018.
  37. “Problem Definition, Addressing the research problem, Publishing the research”, two day workshop on research methodology and IEEE AuthorshipLab, organized by NIE Institute of Technology, Mysore, Sep 07-08, 2018 Karnataka
  38. “Overview of 5G Wireless Technology and mmWave design challenges”, IEEE 2-day Wireless Technology Workshop, Bangalore -29-30 June 2018
  39. “Problem Definition, Addressing a Problem and IEEE AuthorshipLab”, one day session on research methodology during FDP at Christ University, Bangalore, 25 May 2018
  40. “How to Write and Publish paper and IEEE AuthorshipLab”, IEEE 2-day workshop on Research Methodology, Dayanand Sagar College of Engineering, Bangalore, 2-3 May 2018
  41. “ICT Role in Smart City Development”, Guest lecture at St Joseph College of Engineering, Mangalore, 11 April 2018
  42. “Evolution of Wireless/Mobile Communications, 5G and Beyond” (Guest lecture) at Vemana Institute of Technology, Bangalore – 21 Mar, 2018
  43. “5G Wireless Technology and Evolution of Cellular Systems”, (Invited talk) on FDP, Muthoot Institute of Technology, Kochi, Kerala – India – 19 Feb, 2018
  44. “5G and Future Wireless Communications”, (Keynote) at 2nd IEEE ICAECC International Conference, Reva University, Bangalore, 9-10 Feb, 2018
  45. “5G Design Challenges and Possibility in India”, (Panelist) from academia at NXP Bangalore organized by NXP India, 19 Jan, 2018
  46. “5G and Future Wireless Communication Era of 2050”, (Keynote) at 2nd International Workshop on 5GFWT 2017 in association with 11th IEEE ANTS, 19 Dec, 2017, Bhuvaneswar, Odisha - India
  47. “Requirements and Needs of Improving Research in India” (Panelist) GISFI Workshop, Vishwaniketan University, Mumbai 2-3 Dec, 2017
  48. “ICT Role in Building and Designing Smart City”, (Invited) at National Workshop on Smart City, by Govt. of Karnataka - India 6-11 Oct, 2017
  49. “Big Data Science: Emerging Applications”, (Invited) at IEEE Workshop on Big data and Analytics at SJCE Mysore, 19 Sep 2017
  50. “Importance and method of Peer Review in Research Methodology”, (Invited) at Research Methodology workshop organized by IEEE ComSoc Bangalore at Amrita School of Engineering, Bangalore, 8-9 Jul, 2017
  51. “How to write and publish paper in IEEE Conference and Journal”, (Invited) Research Methodology Workshop by VTU & CMRIT, May 8-9, 2017
  52. “5G and VLC Technology” (Invited); IEEE International 5G Summit and GSSM, Kolkata- India, 17-18 Mar 2017
  53. “5G Design Challenges and Opportunities” (Keynote) at National Conference on Electronics Communication and Computing (NCECE 2016), Pune India 24-25 Feb 2017
  54. "Research Trends and Development on IOT enabled 5G Wireless Networks", (Invited) 16-21st Jan, 2017, MSRIT, Bangalore
  55. “Spectrum Sharing in 5G Cellular Design”, 5G Delhi Summit & 27th GISFI Workshop at IETE, New Delhi, 2-3 Dec, 2016.
  56. “Wireless technology 3G and Beyond”, (Invited) at Faculty Development Program (FDP) workshop in Wireless Communication and Networking, July 11, 2016, BMSIT Bangalore
  57. “5G Wireless Communications: mmWave an Enabling Technology”, (Invited) 6 days Faculty Development Program (FDP) workshop 10-16 Oct 2016 at MSRIT, Bangalore –India.
  58. “5G Spectrum and Challenges”, (Invited) 26th GISFI Workshop and 5G CONASENSE International Workshop, Vishwaniketan Institute, Navi Mumbai, 26-27 Sep, 2016
  59. “Draft recommendation to Govt. of India for Delicensing 60GHz band”, (Invited) 24th GISFI Workshop on 5G in association with 5G Summit, Indian Institute of Technology (IIT,) Patna, India, 29-31 Mar.  2016
  60. “Millimeter Wave Spectrum and Challenges in Designing 5G Cellular Systems”, (Invited) 23rd GISFI Standardization Meeting, Hyderabad in association with Global Wireless Summit, Hyderabad, 13-15 Dec. 2015,
  61. “Spectrum and mmWave Technology for 5G Cellular Systems”, (Invited) IEEE Workshop on 5G Technology at Nokia, Bangalore, 12 Dec, 2015
  62. “Optical Wireless Communications: Opportunities and Challenges”, (Guest Lecture) L&T Infotech, Bangalore, India, Sep. 2015
  63. “Visible Light Communication for Road Safety Application in ITS”, (Guest lecture/Seminar) at UTL Technology, Bangalore, India, Mar. 2015
  64. “Emerging VLC in Intelligent Transportation Systems”, (Invited) National conference on Advanced Communication Networks, RNSIT, Bangalore, India, 21-22 Mar, 2014.
  65. “Heterogeneous Networks: a Solution to Mobile Data Crunch”, (Invited) at IEEE ComSoc, CS Bangalore, Workshop at MSRIT, Bangalore-India, 22-23 Nov 2013.
  66. “LTE Deployment, Issues and Research Challenges”, (Invited) at IEEE ComSoc Bangalore section Workshop on LTE and Beyond, IISc. Bangalore – India, on 13-14 Sep. 2013.
  67. “Evolution of Cellular Systems and Networks: 4G and Beyond”, (Invited) Workshop, Acharya Institute of Technology, Bangalore, India, Apr 29, 2013
  68. “Visible Light Communication System, An Emerging Technology”, (Invited) at International Workshop together with GIFSI Meeting (Global ICT Standardization Forum for India), at KSIT, Pune, 11-13 Mar, 2013.
  69. “Optical Wireless Communication and New Emerging Technology: Visible Light Communications”, (Invited) IEEE Bangalore Chapter sponsored Symposium on Mobile and Optical Communication, SVCE Bangalore, 20 Oct. 2012

Tutorial Presented at IEEE Conference

  1. Navin Kumar, “Visible Light Communication For Road Safety Applications in Intelligent Transportation Systems”, IEEE WirelessVitae & Global Wireless Summit, 2015, 13-16 Dec, Hyderabad
  2. Navin Kumar, “Visible Light Communication in Intelligent Transportation Systems”, IEEE ICC 2014, Sydney, Australia, June 10-14, 2014.
  3. Navin Kumar, “Visible light communication: Concept, Technology and System”, 13th IEEE Wireless Communications & Networking conference (WCNC 2013), Shanghai, 7-10 Apr. 2013.
  4. Navin Kumar, “Visible Light Communication: A New Emerging Technology”, IEEE Wireless Optical Communication Networking (WOCN 2013), Bhopal, 26 July 2013.

Courses Taught

  • MIMO and OFDM Communications
  • Wireless Communication
  • Millimeter Wave Communications
  • Multicarrier Communications
  • Satellite communication
  • Data Communication and Networks
  • Internet of Things
  • Digital Communications
  • Introduction to Communication System
  • Communication theory

Student Guidance

Undergraduate Students

Sl. No. Name of the Student(s) Topic Status – Ongoing/Completed Year of Completion
1 Palli Ashish Antenna Design for 5G Technology Ongoing 2021
2 Anupama Khandala
3 Alan Visible light communication and MA C layer design Ongoing 2021
4 Aswin G
5 Ashwin
6 Sonia Performance analysis of THz communication systems ongoing 2021
7 Iyer
8 Sahana
9 Akshay Kumar Study and Investigation of Software Defined Networking and Network virtualization Completed 2020
10 Ms Geethika
11 P. Naveen Varma Performance analysis of Non-orthogonal Multiple access for 5G Networks Completed 2020
12 Pavan L Avantakar
13 P. Uday Kanth

Postgraduate Students

Sl. No. Name of the Student(s) Topic Status – Ongoing/Completed Year of Completion
1 Itesh Bharthi 5G New Radio Performance Analysis Ongoing 2021
2 Ms Apoorva TSS Millimeter wave Multiband Antenna Design Completed 2020
3 Ms Shilpa Sridhar Development of Automation Testing of RSA Networthiness Endpoint Components Completed 2020
4 Suresh Reddy Performance analysis of Spectrum Sharing in 5G Networks Completed 2019
5 Ms Bhabya G Design and Development of Power line communication Completed 2018
6 Ms Priyanka S Integration of WiFi and LiFi for hybrid architecture Completed 2017
7 Ms Sneha Multiband Antenna Design Completed 2017
8 Ms B K Priya Antenna design and fabrication Completed  

Research Scholars

Sl. No. Name of the Student(s) Topic Status – Ongoing/Completed Year of Completion
1 Reema Sharma Modeling and Analysis of Dynamic Packet Scheduling Scheme in Internet of Things Completed 2017
2 Sheeba Kumari M Millimeter Wave Channel Modeling for 5G Communication Thesis under review 2020
3 Priya R NFV and Network Slicing in 5G and Beyond Ongoing  
4 Lalitha H Channel optimization of WiFi 802.11ax Ongoing  
5 Laxmi Sharma Hybrid architecture development to support LiFi and mmWave system Ongoing  
6 Monika Singh MAC layer development and optimization in mmWave dense networks in 5G and beyond Ongoing  
7 Subhra Prakash Giri Resource optimization in 5G Networks Ongoing  
8 Rajalakshmi G AI enabled 6G Wireless Communication Ongoing  
9 Sagar B Multiuser Detection in mmWave 5G Cellular Communication Ongoing  
10 VIgnesh V Design of VCO at mmWave for 5G System Ongoing