Papers by Dhanashri Gawali
Design and implementation of blowfish algorithm using reconfigurable platform
2017 International Conference on Recent Innovations in Signal processing and Embedded Systems (RISE), 2017
Security is an important issue during communication and data transmission. There are many ways to... more Security is an important issue during communication and data transmission. There are many ways to provide security. One method to ensure security is the use of cryptographic algorithms such as DES, AES, RC5, Blowfish etc. Cryptography is a method used for encoding the data which may be hacked by the unauthorized person. In this paper FPGA based design and implementation of Blowfish algorithm has been proposed. For RTL coding VHDL has been used and Virtex-5XC5VLX50T FPGA device used as a reconfigurable platform for implementation of Blowfish algorithm. The aim of this system is to evaluate performance of Blowfish algorithm on reconfigurable platform in terms of power consumption and throughput. For testing purpose image data and ECG data has been used as plaintext.
Mixed signal SoC based Bio-Sensor Node for long term health monitoring
2016 IEEE International WIE Conference on Electrical and Computer Engineering (WIECON-ECE), 2016
Major requirements of wearable biosensor nodes include small size, light weight and low power con... more Major requirements of wearable biosensor nodes include small size, light weight and low power consumption. It can be fulfilled by exploring various high integration technologies such as Application Specific Integrated Circuit (ASIC) or System on Chip (SoC) implementation. This paper presents SoC prototype of a Biosensor Node. Electrocardiogram (ECG), a vital body parameter, has been considered for prototype implementation. It is based on PSoC (Programmable System on Chip), a reconfigurable platform for SoC implementation. The main feature of PSoC is the programmable analog and digital blocks, which allow the implementation of a mixed signal circuit in single chip. Biosensor node comprises of data acquisition module implemented in PSoC 5 LP interfaced with Bluetooth module. It continuously acquires ECG data and wirelessly transmits the data to central node, which essentially is a smart phone. An android application has been used to plot received ECG signal data for monitoring over th...
Floating point unit core for Signal Processing applications
2016 Online International Conference on Green Engineering and Technologies (IC-GET), 2016
Traditional computers data processing is limited by computer data input, output, storage, display... more Traditional computers data processing is limited by computer data input, output, storage, display. Further computing needs repeated binary-decimal conversions. With the expansion of data intensive computing needs of distributed computing, decimal computing of mass data is widely applied in banking, financial, signal processing, bio-medical, astronomy, geography, data acquisition and image compression and other fields. Independent decimal floating point unit is becoming important in these areas. A floating point unit is a part of a computer system specially designed to carry out operations on floating point numbers. Floating point unit have been implemented as a coprocessor rather than as an integrated unit in various systems. Today's floating point arithmetic operations are very important in the design of Digital Signal Processing and application-specific systems. As Fixed-Point arithmetic logics are faster and more area efficient, but sometimes it is desirable to implement calc...
Technology Innovations, Challenges and Emerging Trends in Wearable Bio-Sensor Development
2017 International Conference on Computing, Communication, Control and Automation (ICCUBEA), 2017
There have been a constant demand of diagnostics devices due to growing aging population and risi... more There have been a constant demand of diagnostics devices due to growing aging population and rising chronic diseases. An urge to improve the current healthcare infrastructure has been driving the growth of wearable biosensors. Wearable bio sensors are the devices attached to the human body that detect and monitor changes in body vital parameters. Technology innovations in high integration, energy harvesting, wireless power transfer, advanced materials, printed, flexible and organic devices are playing an important role in the development of wearable biosensors. Also market penetration of smartphones and smart watches is an important factor for driving global market of wearable biosensors. This paper reviews recent developments in wearable biosensors and presents current challenges in wearable biosensor development. Further emerging trends with the advancements in technology have been presented which may accelerate the development of wearable biosensor in near future.
FPGA-based peak detection of ECG signal using histogram approach
2017 International Conference on Recent Innovations in Signal processing and Embedded Systems (RISE), 2017
The heart is the most vital organ of the human body. Its diagnosis is done by a very old-school m... more The heart is the most vital organ of the human body. Its diagnosis is done by a very old-school method called Electrocardiogram (ECG). This paper proposes a simple method to detect and identify the R peak, P peak and the T peaks from a noise free ECG signal. This is achieved with the help of histogram based algorithm, which has been applied on MIT-BIH noise stress test database obtained from physio.net. The method has been chosen as it does not involve any complex mathematical model. The algorithm has been implemented and tested in MATLAB for initial testing. It has been further implemented in Field-programmable gate array (FPGA), VIRTEX-5 device as hardware platform. Xilinx 14.7 ISE design suite with VHDL RTL coding has been used for peak detection and identification purpose. The performance of the proposed technique has been evaluated and compared against previous implementations.
For Internet-based voice transmission, digital telephony, intercoms, telephone answering machines... more For Internet-based voice transmission, digital telephony, intercoms, telephone answering machines, and mass storage, we need to compress audio signals. ADPCM is one of the techniques to reduce the bandwidth in voice communication. More frequently, the smaller file sizes of compressed but lossy formats are used to store and transfer audio. Their small file sizes allow faster Internet transmission, as well as lower consumption of space on memory media. However, lossy formats trade off smaller file size against loss of audio quality, as all such compression algorithms compromise available signal detail. This paper discusses the implementation of ADPCM algorithm for audio compression of .wav file. It yields a compressed file 1⁄4 of the size of the original file. The sound quality of the audio file is maintained reasonably after compression.
Implementation of Ray Tracing Algorithm using Reconfigurable Platform
Programmable Device Circuits and Systems, 2012
The method in computer graphics for computing three dimensional images using virtual camera is ca... more The method in computer graphics for computing three dimensional images using virtual camera is called a rendering method. There are two popular rendering methods, commonly referred to as rasterization and ray tracing. The standard rendering method, known as rasterization, is a local illumination rendering method. In contrast ray tracing is a global illumination rendering method. In standard method of computing 3-dimentional images, advanced effects such as reflections and shadows are done using tricks and are not computed with accuracy, thus diminishing the scope for further progress in simulating real life images. This paper describe an alternative method called ray-tracing, to investigate if it can replace rasterization with capability of creating more realism. It further entails how fixed pipeline architecture can improve performance of ray-tracing algorithm. To demonstrate this idea, hardware has been designed with a fixed pipelined architecture. Ray generator entity generates r...
FPGA Based Design & Implementation of Low Power FIR Filter for ECG Signal Processing
Abstract— WSN is composed of a large number of sensor nodes with multi-hop networking capabilit... more Abstract— WSN is composed of a large number of sensor nodes with multi-hop networking capability that are widely deployed for a wide variety of applications such as health monitoring systems, environment monitoring, interactive user interfaces, etc. Sensor systems must utilize the minimal possible energy while operating over a wide range of operating scenarios. Signal processing is an essential component of wireless sensor network node. One of the most widely used operations in this is finite-impulse response (FIR) filtering. Multiplication is at the core of FIR filter and saving power at the multiplication level can significantly impact the lifetime of a sensor node. In this, we propose design of low power FIR filter and implementations of the same on FPGA. MATLAB is used for an Equiripple or Remez Exchange (Parks-McClellan) technique of FIR filter design. A notch FIR filter is designed for the removal of power line interference in ECG signal which is a very important step in the...
Innovative shopping cart for smart cities
An unconventional novel product which is accepted by the society is the one that brings contentme... more An unconventional novel product which is accepted by the society is the one that brings contentment, satisfaction with benefits and coherence in day to day life of a common man. Innovative shopping cart is a system developed to abet a person in everyday shopping by involving some automation in customarily practiced process. This will help the person in everyday shopping by minimizing the time required, while purchasing the product with reasonable price and best offers. The main objective is to provide a robust technology with low-cost, high efficiency and easily adaptable system for making the process of shopping effortless. The system consists of 4 key modules (i) Product Detection (PD) (ii) Product Recommendation (PR) (iii) Budget Setting (BS) and (iv) Automatic Billing (AB). PD is used to detect the product placed in shopping cart using RFID technology, meanwhile PR facilitates providing relevant product information and ongoing offers. BS helps to set the budget if purchase cost ...
Review of ECG compression techniques and implementations
2016 International Conference on Global Trends in Signal Processing, Information Computing and Communication (ICGTSPICC)
A duration of century past over to the invention of electrocardiogram (ECG) but even today also e... more A duration of century past over to the invention of electrocardiogram (ECG) but even today also electrocardiogram (ECG) monitoring is playing its important role of help to take care of patients having cardiac diseases. Electrocardiogram (ECG) data compression is important for portable solutions, for reducing the storage requirements and low power consumption. Large variety of ECG compression algorithms and their implementation have been proposed in literature till date. Selection of the appropriate ECG compression technique needs important considerations such as storage requirements and communication link utilization. Further power consumption and chip area requirements depend on the computational complexity of ECG compression algorithm. Thus identifying suitable ECG compression technique for the given application requirements remains a big challenge from implementation point of view. Review of the different ECG compression techniques and ECG compression implementations available in literature is presented in this paper, which can be helpful for identifying suitable technique for application specific requirements.
Comparative study of ECG feature extraction methods
2017 2nd IEEE International Conference on Recent Trends in Electronics, Information & Communication Technology (RTEICT)
Electrocardiogram (ECG) signals are used for the detection of heart related diseases from more th... more Electrocardiogram (ECG) signals are used for the detection of heart related diseases from more than a century now. Electrocardiogram (ECG) is an electrical activity of the heart that is recorded by placing many electrodes on the body. Hence, it is important to identify an appropriate method for extracting features in ECG signal. This paper provides insight into different efficient methods for this purpose. The prominent methods presented in this paper are Pan-Tompkins, Hilbert transform, Histogram approach, Wavelet transform, Auto-regression(AR), Independent Component Analysis(ICA), Linear prediction(LP), Adaptive threshold. A comparative analysis is done for these feature extraction methods based on various performance parameters like sensitivity, predictivity and accuracy. The above methods are reviewed on lines of these parameters, which can be used to identify suitable method for ECG feature extraction.
2017 2nd IEEE International Conference on Recent Trends in Electronics, Information & Communication Technology (RTEICT)
The Indian economy is based on agriculture-about 70% of its population depends on agriculture and... more The Indian economy is based on agriculture-about 70% of its population depends on agriculture and it contributes to 1/3rd of the national income. Yet, being a country which has the capacity to produce three crops in a year, the ceaseless cases of farmer suicides has become an ignominious fact. The development of agriculture has much to do with the economic welfare of the country.Indian monsoon being erratic in nature, there is irregularity in the distribution of rainfall throughout the year. The irrigation system helps the farmers to have less dependency on rain water. Balanced irrigation has been considered essential for optimal development of crops. Superfluous irrigation leaches nutritive elements of the soil as water seeps down due to gravitational force of the earth. It also causes water logging. Similarly, scant irrigation can be harmful as water does not reach the lithosphere. Irrigation practices in India need constant monitoring. This paper focuses on reducing the water wastage by using smart irrigation. It discusses how Internet of Things (IoT) can be used to achieve optimal irrigation by continuously monitoring the water level. It also discusses how water supply can be maintained using the proposed mobile application.
Wearable Sensors Based Pilgrim Tracking and Health Monitoring system
2016 International Conference on Computing Communication Control and automation (ICCUBEA), 2016
The custom of pilgrimage is widespread all over the world, e.g. Kumbh Mela in India, Hajj in Saud... more The custom of pilgrimage is widespread all over the world, e.g. Kumbh Mela in India, Hajj in Saudi Arabia. These are the peaceful gatherings wherein, millions of people from all corners of the world come to perform their holy rituals. However, during these events, pilgrims getting lost in the crowd, medical emergencies and stampede are likely to happen. In such incidents, authorities involved in the crowd management face difficulties in identifying and locating the lost, the injured, the ill or the dead person. Therefore, there is always delay in reaching the medical help to the needy person. This paper presents a real-time pilgrim tracking and health monitoring system that has been designed and implemented using Arduino in order to help the authority solve this problem. A wearable unit is provided to each pilgrim for sensing the location and vital health parameters of that person. The authority in the control room is connected to the wearable unit using Global system for mobile communication. The significance of this system is to pilgrims as well as to the authority. The pilgrims can call for help when needed. The visual display of the pilgrims' data is available on the computer for the authority in the control room. Adverse health is indicated through the alert message on the GUI. Additionally, there are provisions for informing the relatives through short message service and maintaining records of the data of pilgrims for reference.
Clean ECG (Electrocardiogram) is very important to detect many diseases. ECG signal can be corrup... more Clean ECG (Electrocardiogram) is very important to detect many diseases. ECG signal can be corrupted by various noises in real time situations. ECG is mainly corrupted by Baseline wander noise, Powerline Interference noise, and EMG noise. These types of noise are present at different frequency range of ECG signal. There are various filtering techniques available for removing these noises. This paper proposes FPGA based implementation of Kaiser Window based Cascaded FIR (Finite Impulse Response) filter in which FIR High Pass Filter, FIR Band Stop Filter and FIR Low Pass Filter are cascaded. Proposed implementation can remove Baseline wander noise, Powerline Interference noise, EMG (Electromyogram) noise in a single stage. The ECG database has been taken from Physio.net. The proposed FIR filter has been synthesized and implemented on Virtex5 FPGA using Xilinx ISE 14.5.
Implementation of Zigbee Based Power Management System
Communications in Computer and Information Science, 2011
Implementation of ECG sensor for real time signal processing applications
2014 International Conference on Advances in Electronics Computers and Communications, 2014
Conventional versus Vedic Mathematical Method for Hardware Implementation of a Multiplier
2009 International Conference on Advances in Computing, Control, and Telecommunication Technologies, 2009
Abstract-Aim of this paper is to compare and prove implementation of normal multiplication and Ve... more Abstract-Aim of this paper is to compare and prove implementation of normal multiplication and Vedic multiplication (using Urdhva Tiryakbhyam Sutra) on digital hardware requires same number of multiplication and addition operations.It makes difference only for mental calculations. ...
FPGA Based Micro-PLC Design Approach
2009 International Conference on Advances in Computing, Control, and Telecommunication Technologies, 2009
For small, stand-alone control of a single process, microPLCs are more cost effective, compact, a... more For small, stand-alone control of a single process, microPLCs are more cost effective, compact, and easier to use than PC-based solutions. There have been some studies on the implementation of a control program in FPGA. However most of them concentrated on techniques to convert functional-level control programs into logic description in the form of HDL. So with these approaches it
The patient-related data stored in the WBSN plays an important role in medical diagnosis and trea... more The patient-related data stored in the WBSN plays an important role in medical diagnosis and treatment; hence it is essential to ensure the security of these data. Access to patient-related data must be strictly
limited only to authorized users; otherwise, the patient’s privacy could be abused. There has been very little study done in encryption algorithms suitable for WBSN. In this paper we focus on RC5 encryption algorithm as a potential cipher solution for providing data protection in WBSN. RC5 can be considered as
one of the best ciphers in terms of overall performance, when used in nodes with limited memory and processing capabilities. In WBSN the size of data varies for different medical (health parameters such as ECG, EEG, Blood pressure, Blood Sugar etc) or nonmedical (video, audio etc) applications. RC5 is a
highly efficient and flexible cryptographic algorithm, for which many parameters (key size, block size, number of rounds) can be adjusted to tradeoff security strength with power consumption and computational overhead. Thus RC5 with suitable parameters may perform well for WBSN applications with different data
size. Implementations for WBSN nodes are in evolving stage now. This paper further presents a brief survey of various implementations of RC5 algorithm to convince its suitability for WBSN
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Papers by Dhanashri Gawali
limited only to authorized users; otherwise, the patient’s privacy could be abused. There has been very little study done in encryption algorithms suitable for WBSN. In this paper we focus on RC5 encryption algorithm as a potential cipher solution for providing data protection in WBSN. RC5 can be considered as
one of the best ciphers in terms of overall performance, when used in nodes with limited memory and processing capabilities. In WBSN the size of data varies for different medical (health parameters such as ECG, EEG, Blood pressure, Blood Sugar etc) or nonmedical (video, audio etc) applications. RC5 is a
highly efficient and flexible cryptographic algorithm, for which many parameters (key size, block size, number of rounds) can be adjusted to tradeoff security strength with power consumption and computational overhead. Thus RC5 with suitable parameters may perform well for WBSN applications with different data
size. Implementations for WBSN nodes are in evolving stage now. This paper further presents a brief survey of various implementations of RC5 algorithm to convince its suitability for WBSN