vatsala sharma - Academia.edu (original) (raw)

Papers by vatsala sharma

Research paper thumbnail of Design of Hybrid Blind Detection Based Spectrum Sensing Technique

Journal of Scientific Research, 2020

Cognitive Radio is a boon to efficient utilization of spectrum to meet the demand of next generat... more Cognitive Radio is a boon to efficient utilization of spectrum to meet the demand of next generation. Spectrum Sensing (SS) is an active research area, essential to meet the requirement of efficient spectrum utilization as it detects the vacant bands. This paper develops a Hybrid Blind Detection (HBD) technique for cooperative spectrum sensing which combines the Energy Detector (ED) and the Anti-Eigen Value Detection (AVD) techniques together to enhance the detection accuracy of a cognitive radio. Collaboration among the cognitive users is achieved to reduce the error and hard fusion based detection is implemented to detect the existence of primary user. The detection accuracy of the design is evaluated with respect to detection probabilities and the results are examined for improvements with the traditional two stage detection techniques. Fusion rules for the cooperative environment are implemented and compared to detect majority rule suitable for the proposed design.

Research paper thumbnail of The Comparative Study of Peak-to-Average Power Ratio Reduction Techniques for LTE OFDM system & its Effect

Orthogonal frequency division multiplexing (OFDM) is a multicarrier modulation technique which us... more Orthogonal frequency division multiplexing (OFDM) is a multicarrier modulation technique which uses orthogonal subcarriers to convey information. Orthogonal frequency division multiplexing (OFDM) has been adopted as a standard for various high data rate wireless communication systems due to the high spectral bandwidth efficiency, robustness to frequency selective fading channels, well suited for mimo technology, Facilitate frequency-domain scheduling supports flexible bandwidth deployment etc. However, implementation of the OFDM system entails several difficulties. One of the major drawbacks is the high peak-to-average power ratio (PAPR) problem in multicarrier transmission system which leads to power inefficiency in RF section of the transmitter, inter carrier interference, high out-of-band radiation, and bit error rate performance degradation. It is preferred to have a minimum PAPR, as it will allow a higher average power to be transmitted for a fixed peak power; and thus, improvi...

Research paper thumbnail of A survey on Smart Railway Track Fault Detection Using IOT

Indian Railways is the largest railway network in Asia and additionally world's second larges... more Indian Railways is the largest railway network in Asia and additionally world's second largest network operated underneath a single management. Due to its large size it is difficult to monitor the cracks in tracks manually. This paper deals with this problem and detects cracks in tracks with the help of ultrasonic sensor attached to moving assembly with help of stepper motor. Ultrasonic sensor allows the device to moves back and forth across the track and if there is any fault, it gives information to the cloud server through which railway department is informed on time about cracks and many lives can be saved. This is the application of IoT, due to this it is cost effective system. This effective methodology of continuous observation and assessment of rail tracks might facilitate to stop accidents. This methodology endlessly monitors the rail stress, evaluate the results and provide the rail break alerts such as potential buckling conditions, bending of rails and wheel impact l...

Research paper thumbnail of Multi Band Multi Polarized Microstrip Patch Antenna

Research paper thumbnail of Real-Time Implementation of Enhanced Energy-Based Detection Technique

Research paper thumbnail of A Literature Review on Spectrum Sensing in Cognitive Radio Applications

2018 Second International Conference on Intelligent Computing and Control Systems (ICICCS), 2018

Cognitive radio is a promising technology to meet the requirements of efficient usage of limited ... more Cognitive radio is a promising technology to meet the requirements of efficient usage of limited available frequency spectrum for next generation technology and demand for high data transmission. Cognitive radio technology requires detection of primary user signals for dynamic allocation of spectrum hole to secondary users. Spectrum sensing is an important function and an active research area in this regard. In this paper, a literature review of spectrum sensing is discussed, presenting different research domains of spectrum sensing for cognitive radio networks. System models with different modelling techniques are explained that can implement spectrum sensing. It also includes a brief summary of research challenges associated with spectrum sensing. The main subject of this paper is classification of spectrum sensing technique based on number of users, their comparison and future scope of research. Finally, we present current wireless standards that employ spectrum sensing and hardware platforms that can implement spectrum sensing algorithms in real time environment.

Research paper thumbnail of Design of Energy Detection based Multistage Sensing Technique

Journal of scientific research, 2020

Research paper thumbnail of Design & Implementation of High speed Multipliers

Research paper thumbnail of Comparative Study of Peak-to-Average Power Ratio Reduction Techniques for OFDM System

ijera.com

Orthogonal Frequency Division Multiplexing (OFDM) is one well-known scheme, which has recently be... more Orthogonal Frequency Division Multiplexing (OFDM) is one well-known scheme, which has recently become a preferred choice for parallel-data-transmission which reduces the influence of multipath fading and avoids the use of complex equalizers. ...

Research paper thumbnail of CMOS Design of Pulse Processing ASIC for Radiation Detection

2018 Second International Conference on Inventive Communication and Computational Technologies (ICICCT), 2018

This paper presents the design & development of an 36 channel Pulse Processing ASIC using 0.3... more This paper presents the design & development of an 36 channel Pulse Processing ASIC using 0.35µm mixed CMOS technology for radiation detection in high energy physics experiments. The benefits of CMOS technology in nuclear instrumentation has surpassed the expectation due to advancement of technology, emerging detectors, readouts data rates and very important radiation hardness with benefits of low power and high density of electronics. The Pulse Processing ASIC intended to use with silicon pad detectors find application in high energy physics experiments for detecting nuclear radiations and converting the charge into electrical signals. The methodology of design includes circuit design and its optimization using public domain CAD tool.

Research paper thumbnail of Arduino based Smart Water Management

International Journal of Engineering Research and

Rainwater harvesting is the process to store the rain water in containers before the rain water g... more Rainwater harvesting is the process to store the rain water in containers before the rain water goes beneath the ground and recharges the underground water table. This paper proposes the design of smart water management system based on Arduino as an IoT application. In the proposed design, once water is collected in ground tank, the ultrasonic sensor is used to sense the level of water. The sensed information is updated on an android application through which user can visualize the water level on a smartphone. According to the level of water in the tank, the motor functioning is controlled, when water reaches near high level of underground tank, motor will be turned on through Blynk application on smartphone to transfer the water in the ground tank to main tank and when main tank is about to fill up it will turn off automatically. When soil of the garden is dry, the soil moisture sensor senses the dryness in soil and automatically start the water pump and water flow through main tank and reach the soil of garden then motor is automatically switched off. Storing the rainwater reduces the surface runoff. This also reduces the surface erosion. By capturing rainwater in reservoirs, the flood problem in large rainfalls is also diminished.

Research paper thumbnail of Design of Hybrid Blind Detection Based Spectrum Sensing Technique

Journal of Scientific Research, 2020

Cognitive Radio is a boon to efficient utilization of spectrum to meet the demand of next generat... more Cognitive Radio is a boon to efficient utilization of spectrum to meet the demand of next generation. Spectrum Sensing (SS) is an active research area, essential to meet the requirement of efficient spectrum utilization as it detects the vacant bands. This paper develops a Hybrid Blind Detection (HBD) technique for cooperative spectrum sensing which combines the Energy Detector (ED) and the Anti-Eigen Value Detection (AVD) techniques together to enhance the detection accuracy of a cognitive radio. Collaboration among the cognitive users is achieved to reduce the error and hard fusion based detection is implemented to detect the existence of primary user. The detection accuracy of the design is evaluated with respect to detection probabilities and the results are examined for improvements with the traditional two stage detection techniques. Fusion rules for the cooperative environment are implemented and compared to detect majority rule suitable for the proposed design.

Research paper thumbnail of The Comparative Study of Peak-to-Average Power Ratio Reduction Techniques for LTE OFDM system & its Effect

Orthogonal frequency division multiplexing (OFDM) is a multicarrier modulation technique which us... more Orthogonal frequency division multiplexing (OFDM) is a multicarrier modulation technique which uses orthogonal subcarriers to convey information. Orthogonal frequency division multiplexing (OFDM) has been adopted as a standard for various high data rate wireless communication systems due to the high spectral bandwidth efficiency, robustness to frequency selective fading channels, well suited for mimo technology, Facilitate frequency-domain scheduling supports flexible bandwidth deployment etc. However, implementation of the OFDM system entails several difficulties. One of the major drawbacks is the high peak-to-average power ratio (PAPR) problem in multicarrier transmission system which leads to power inefficiency in RF section of the transmitter, inter carrier interference, high out-of-band radiation, and bit error rate performance degradation. It is preferred to have a minimum PAPR, as it will allow a higher average power to be transmitted for a fixed peak power; and thus, improvi...

Research paper thumbnail of A survey on Smart Railway Track Fault Detection Using IOT

Indian Railways is the largest railway network in Asia and additionally world's second larges... more Indian Railways is the largest railway network in Asia and additionally world's second largest network operated underneath a single management. Due to its large size it is difficult to monitor the cracks in tracks manually. This paper deals with this problem and detects cracks in tracks with the help of ultrasonic sensor attached to moving assembly with help of stepper motor. Ultrasonic sensor allows the device to moves back and forth across the track and if there is any fault, it gives information to the cloud server through which railway department is informed on time about cracks and many lives can be saved. This is the application of IoT, due to this it is cost effective system. This effective methodology of continuous observation and assessment of rail tracks might facilitate to stop accidents. This methodology endlessly monitors the rail stress, evaluate the results and provide the rail break alerts such as potential buckling conditions, bending of rails and wheel impact l...

Research paper thumbnail of Multi Band Multi Polarized Microstrip Patch Antenna

Research paper thumbnail of Real-Time Implementation of Enhanced Energy-Based Detection Technique

Research paper thumbnail of A Literature Review on Spectrum Sensing in Cognitive Radio Applications

2018 Second International Conference on Intelligent Computing and Control Systems (ICICCS), 2018

Cognitive radio is a promising technology to meet the requirements of efficient usage of limited ... more Cognitive radio is a promising technology to meet the requirements of efficient usage of limited available frequency spectrum for next generation technology and demand for high data transmission. Cognitive radio technology requires detection of primary user signals for dynamic allocation of spectrum hole to secondary users. Spectrum sensing is an important function and an active research area in this regard. In this paper, a literature review of spectrum sensing is discussed, presenting different research domains of spectrum sensing for cognitive radio networks. System models with different modelling techniques are explained that can implement spectrum sensing. It also includes a brief summary of research challenges associated with spectrum sensing. The main subject of this paper is classification of spectrum sensing technique based on number of users, their comparison and future scope of research. Finally, we present current wireless standards that employ spectrum sensing and hardware platforms that can implement spectrum sensing algorithms in real time environment.

Research paper thumbnail of Design of Energy Detection based Multistage Sensing Technique

Journal of scientific research, 2020

Research paper thumbnail of Design & Implementation of High speed Multipliers

Research paper thumbnail of Comparative Study of Peak-to-Average Power Ratio Reduction Techniques for OFDM System

ijera.com

Orthogonal Frequency Division Multiplexing (OFDM) is one well-known scheme, which has recently be... more Orthogonal Frequency Division Multiplexing (OFDM) is one well-known scheme, which has recently become a preferred choice for parallel-data-transmission which reduces the influence of multipath fading and avoids the use of complex equalizers. ...

Research paper thumbnail of CMOS Design of Pulse Processing ASIC for Radiation Detection

2018 Second International Conference on Inventive Communication and Computational Technologies (ICICCT), 2018

This paper presents the design & development of an 36 channel Pulse Processing ASIC using 0.3... more This paper presents the design & development of an 36 channel Pulse Processing ASIC using 0.35µm mixed CMOS technology for radiation detection in high energy physics experiments. The benefits of CMOS technology in nuclear instrumentation has surpassed the expectation due to advancement of technology, emerging detectors, readouts data rates and very important radiation hardness with benefits of low power and high density of electronics. The Pulse Processing ASIC intended to use with silicon pad detectors find application in high energy physics experiments for detecting nuclear radiations and converting the charge into electrical signals. The methodology of design includes circuit design and its optimization using public domain CAD tool.

Research paper thumbnail of Arduino based Smart Water Management

International Journal of Engineering Research and

Rainwater harvesting is the process to store the rain water in containers before the rain water g... more Rainwater harvesting is the process to store the rain water in containers before the rain water goes beneath the ground and recharges the underground water table. This paper proposes the design of smart water management system based on Arduino as an IoT application. In the proposed design, once water is collected in ground tank, the ultrasonic sensor is used to sense the level of water. The sensed information is updated on an android application through which user can visualize the water level on a smartphone. According to the level of water in the tank, the motor functioning is controlled, when water reaches near high level of underground tank, motor will be turned on through Blynk application on smartphone to transfer the water in the ground tank to main tank and when main tank is about to fill up it will turn off automatically. When soil of the garden is dry, the soil moisture sensor senses the dryness in soil and automatically start the water pump and water flow through main tank and reach the soil of garden then motor is automatically switched off. Storing the rainwater reduces the surface runoff. This also reduces the surface erosion. By capturing rainwater in reservoirs, the flood problem in large rainfalls is also diminished.