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Rutgers University
1.
Debnath, Subrata.
Design of fractional-N frequency synthesizer for 2.4/5 GHz wireless local area network.
Degree: MS, Electrical and Computer Engineering, 2015, Rutgers University
URL: https://rucore.libraries.rutgers.edu/rutgers-lib/48470/ 
► Frequency synthesizers are widely being used for generating local oscillators for majority of RF, wireless, communication, and navigation systems for the last few decades. Phase-locked-loops…
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▼ Frequency synthesizers are widely being used for generating local oscillators for majority of RF, wireless, communication, and navigation systems for the last few decades. Phase-locked-loops (PLL) on the other hand are one of the fundamental portions of any digital/mixed-signal devices in addition to the previously mentioned systems. In this thesis work, a PLL based fractional-N frequency synthesizer for 2.4 GHz and 5 GHz wireless local area network (WLAN) in 0.18 μm CMOS-RF process has been proposed. With the adoption of a MASH 1-1-1 delta-sigma modulator facilitating fractional division ratios through a programmable divider, the frequency synthesizer differs from its integer-N counterpart in its higher reference frequency, wider loop bandwidth, faster settling time, and better phase noise and suppression of spurious tones. The synthesizer consists of several blocks, including a wide range LC-tuned voltage controlled oscillator (VCO), divide by 16 – 252 programmable divider, dead-zone free phase-frequency detector (PFD), low mismatch high swing cascode charge pump (CP), 3rd order loop filter (LF), and a 3rd order MASH delta-sigma modulator (DSM)—all of which have been designed and constructed in both transistor and layout levels. SPICE (BSIM3) level simulations have been performed for all the individual blocks as well as the complete frequency synthesizer for extracting transient, DC, periodic-steady-state, and phase-noise analyses results. Overall, with 1.2 V supply voltage, the 0.628 mm X 0.594 mm fractional-N frequency synthesizer achieves “locked” state in approximately 2 μs and produces approximately -111 dBc/Hz phase noise at 1 MHz offset (excluding the MASH modulator) while consuming about 20.76 mW of power.
Advisors/Committee Members: Caggiano, Michael (chair), McAfee, Sigrid (internal member), Gajic, Zoran (internal member).
Subjects/Keywords: Wireless communication systems; Local area networks (Computer networks)
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APA (6th Edition):
Debnath, S. (2015). Design of fractional-N frequency synthesizer for 2.4/5 GHz wireless local area network. (Masters Thesis). Rutgers University. Retrieved from https://rucore.libraries.rutgers.edu/rutgers-lib/48470/
Chicago Manual of Style (16th Edition):
Debnath, Subrata. “Design of fractional-N frequency synthesizer for 2.4/5 GHz wireless local area network.” 2015. Masters Thesis, Rutgers University. Accessed January 18, 2021.
https://rucore.libraries.rutgers.edu/rutgers-lib/48470/.
MLA Handbook (7th Edition):
Debnath, Subrata. “Design of fractional-N frequency synthesizer for 2.4/5 GHz wireless local area network.” 2015. Web. 18 Jan 2021.
Vancouver:
Debnath S. Design of fractional-N frequency synthesizer for 2.4/5 GHz wireless local area network. [Internet] [Masters thesis]. Rutgers University; 2015. [cited 2021 Jan 18].
Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/48470/.
Council of Science Editors:
Debnath S. Design of fractional-N frequency synthesizer for 2.4/5 GHz wireless local area network. [Masters Thesis]. Rutgers University; 2015. Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/48470/
Rutgers University
2.
Mhaske, Swapnil.
High-throughput FPGA QC-LDPC decoder architecture for 5G wireless.
Degree: MS, Electrical and Computer Engineering, 2015, Rutgers University
URL: https://rucore.libraries.rutgers.edu/rutgers-lib/48610/
► Wireless data traffic is expected to increase by a 1000 fold by the year 2020 with more than 50 billion devices connected to these wireless…
(more)
▼ Wireless data traffic is expected to increase by a 1000 fold by the year 2020 with more than 50 billion devices connected to these wireless networks with peak data rates upto 10 Gb/s. The next generation of wireless cellular technology (being collectively termed as 5G) is slated to operate in the mm-wave (30-300GHz) spectrum which comes with challenges such as, reliance on line of sight (LOS) communication, short range of communication, increased shadowing and, rapid fading in time. This will necessitate additional signal processing techniques such as large antenna arrays and beamsteering which will further reduce the processing budget available to the channel coding system. In an effort ort to design and develop a channel coding solution suitable to such systems, in this thesis we propose strategies to achieve a high-throughput FPGA-based decoder architecture for a QC-LDPC code based on circulant-1 identity matrix construction. We present a novel representation of the parity-check matrix (PCM) providing a multifold throughput gain. Splitting of the node processing algorithm enables us to achieve pipelining of blocks and hence layers. By partitioning the PCM into not only layers but superlayers, we derive an upper bound on the pipelining depth with respect to the size of the superlayer for the compact representation. To validate the architecture, a decoder for the IEEE 802.11n (2012) QC-LDPC is implemented on the Xilinx Kintex-7 FPGA with the help of the FPGA IP compiler available in the NI LabVIEW Communication System Design Suite (CSDS). It off ers an automated and systematic compilation flow. An optimized hardware implementation from the decoder algorithm was generated in approximately 3 minutes, achieving an overall throughput of 608Mb/s (at 260MHz). With little or no modi fications, the proposed decoder architecture caters to a wide range of circulant-1 identity matrix construction based QC-LDPC codes widely accepted in several communication and data storage standards.
Advisors/Committee Members: Spasojevic, Predrag (chair), Yates, Roy (internal member), Gajic, Zoran (internal member).
Subjects/Keywords: Modulation (Electronics); Wireless communication systems
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APA (6th Edition):
Mhaske, S. (2015). High-throughput FPGA QC-LDPC decoder architecture for 5G wireless. (Masters Thesis). Rutgers University. Retrieved from https://rucore.libraries.rutgers.edu/rutgers-lib/48610/
Chicago Manual of Style (16th Edition):
Mhaske, Swapnil. “High-throughput FPGA QC-LDPC decoder architecture for 5G wireless.” 2015. Masters Thesis, Rutgers University. Accessed January 18, 2021.
https://rucore.libraries.rutgers.edu/rutgers-lib/48610/.
MLA Handbook (7th Edition):
Mhaske, Swapnil. “High-throughput FPGA QC-LDPC decoder architecture for 5G wireless.” 2015. Web. 18 Jan 2021.
Vancouver:
Mhaske S. High-throughput FPGA QC-LDPC decoder architecture for 5G wireless. [Internet] [Masters thesis]. Rutgers University; 2015. [cited 2021 Jan 18].
Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/48610/.
Council of Science Editors:
Mhaske S. High-throughput FPGA QC-LDPC decoder architecture for 5G wireless. [Masters Thesis]. Rutgers University; 2015. Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/48610/
Rutgers University
3.
Kumar, Raunak, 1991-.
Modeling and control of processes in organic solar cells.
Degree: MS, Electrical and Computer Engineering, 2014, Rutgers University
URL: https://rucore.libraries.rutgers.edu/rutgers-lib/45317/
► The development of affordable, inexhaustible and clean solar energy technologies will have huge long term benefits, and the solar cell lies at the heart of…
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▼ The development of affordable, inexhaustible and clean solar energy technologies will have huge long term benefits, and the solar cell lies at the heart of this technology, which converts the incident sun light into electric current. During the last years the performance of bulk hetrojunction solar cells has been improved significantly making them a viable option for future generation solar cells. For a large-scale application of this technology further improvements are required. In this thesis, we explore the means to improve the efficiency of organic solar cells by studying the one dimensional drift diffusion equations and understanding the parameters which play a significant role in the operations of these devices. After identifying the physical parameters, a state space technique is applied and the nonlinear model is developed which is both time and space varying. Then, two sub models are derived - one by freezing space and another by freezing time. Both models are nonlinear. We perform linearization of the nonlinear model around a nominal operating point for the purpose of designing linearized optimal controller. The controllers obtained are applied to the nonlinear solar cell model. As the parameters are numerically very large in range, we performed scaling and derived a scaled down model. The internal stability of both the models is checked and an optimal controller is developed around the nominal point with the objective to maintain a constant number of electrons and holes which in turn directly affects the output current of the solar cell. This steady state constant values can ensure desired charge separation which sweep towards the cathode and anode before they exit the device. In the event of high intensity of sunlight this steady state values will help overcome the space charge effect which is an important factor in organic cells. The model is also subjected to the Turing instability test for a reaction diffusion system to investigate and detect the presence of Turing patterns in the drift-diffusion model of the organic solar cell.
Advisors/Committee Members: Gajic, Zoran (chair), McAfee, Sigrid (internal member), Caggiano, Michael (internal member).
Subjects/Keywords: Solar cells – Design and construction; Solar cells – Materials
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APA (6th Edition):
Kumar, Raunak, 1. (2014). Modeling and control of processes in organic solar cells. (Masters Thesis). Rutgers University. Retrieved from https://rucore.libraries.rutgers.edu/rutgers-lib/45317/
Chicago Manual of Style (16th Edition):
Kumar, Raunak, 1991-. “Modeling and control of processes in organic solar cells.” 2014. Masters Thesis, Rutgers University. Accessed January 18, 2021.
https://rucore.libraries.rutgers.edu/rutgers-lib/45317/.
MLA Handbook (7th Edition):
Kumar, Raunak, 1991-. “Modeling and control of processes in organic solar cells.” 2014. Web. 18 Jan 2021.
Vancouver:
Kumar, Raunak 1. Modeling and control of processes in organic solar cells. [Internet] [Masters thesis]. Rutgers University; 2014. [cited 2021 Jan 18].
Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/45317/.
Council of Science Editors:
Kumar, Raunak 1. Modeling and control of processes in organic solar cells. [Masters Thesis]. Rutgers University; 2014. Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/45317/
Rutgers University
4.
Almansouri, Saif.
Reduced-order Kalman filter for a class of continuous - time systems with slow and fast modes.
Degree: MS, Electrical and Computer Engineering, 2016, Rutgers University
URL: https://rucore.libraries.rutgers.edu/rutgers-lib/51186/
► In this thesis, complete decomposition of the Kalman filter into the reduced-order Kalman filter with slow and fast modes is addressed. First, we investigate the…
(more)
▼ In this thesis, complete decomposition of the Kalman filter into the reduced-order Kalman filter with slow and fast modes is addressed. First, we investigate the decomposition so that the slow and fast filters are completely separated with both of filters driven by the system measurements. The simulation results are presented for such a decomposition using an aircraft example. In the second part, this thesis presents the design of reduced order Kalman filters for systems with both slow and fast modes for the case of perfect measurement. The main advantage of the reduced order approach is moderating and reducing mathematical difficulties to obtain the optimal state estimation. This will facilitate the use of Kalman filter for a class of real-time physical systems. In this thesis, we explain the effectiveness of the proposed design through theoretical studies and simulation results.
Advisors/Committee Members: Gajic, Zoran (chair), Godrich, Hana (internal member), Orfanidis, Sophocles (internal member).
Subjects/Keywords: Kalman filtering
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APA (6th Edition):
Almansouri, S. (2016). Reduced-order Kalman filter for a class of continuous - time systems with slow and fast modes. (Masters Thesis). Rutgers University. Retrieved from https://rucore.libraries.rutgers.edu/rutgers-lib/51186/
Chicago Manual of Style (16th Edition):
Almansouri, Saif. “Reduced-order Kalman filter for a class of continuous - time systems with slow and fast modes.” 2016. Masters Thesis, Rutgers University. Accessed January 18, 2021.
https://rucore.libraries.rutgers.edu/rutgers-lib/51186/.
MLA Handbook (7th Edition):
Almansouri, Saif. “Reduced-order Kalman filter for a class of continuous - time systems with slow and fast modes.” 2016. Web. 18 Jan 2021.
Vancouver:
Almansouri S. Reduced-order Kalman filter for a class of continuous - time systems with slow and fast modes. [Internet] [Masters thesis]. Rutgers University; 2016. [cited 2021 Jan 18].
Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/51186/.
Council of Science Editors:
Almansouri S. Reduced-order Kalman filter for a class of continuous - time systems with slow and fast modes. [Masters Thesis]. Rutgers University; 2016. Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/51186/
Rutgers University
5.
Kolar, Sudarshan, 1990-.
Modeling, system analysis and control of a proton exchange membrane fuel cell.
Degree: MS, Electrical and Computer Engineering, 2016, Rutgers University
URL: https://rucore.libraries.rutgers.edu/rutgers-lib/51334/
► This thesis presents a control technique for a 9th-order linearized Proton Exchange Membrane fuel cell model. This work starts with giving a brief introduction about…
(more)
▼ This thesis presents a control technique for a 9th-order linearized Proton Exchange Membrane fuel cell model. This work starts with giving a brief introduction about the construction and working of PEM fuel cell. Then, various fuel cell subsystems and their corresponding non-linear dynamical equations are presented. These equations are simulated to obtain steady state operating points of the model which is further used in Jacobian linearization. The linearized model consists of nine states as opposed to the eight states of the linearized model available in the literature. A pole placement controller is designed for the linearized model to obtain desired transient performance. This work concludes with inspiring the readers about some future works that can be carried out on this model.
Advisors/Committee Members: Gajic, Zoran (chair), Godrich, Hana (internal member), SURYAWANSHI, PRASHEEL (outside member).
Subjects/Keywords: Proton exchange membrane fuel cells
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APA (6th Edition):
Kolar, Sudarshan, 1. (2016). Modeling, system analysis and control of a proton exchange membrane fuel cell. (Masters Thesis). Rutgers University. Retrieved from https://rucore.libraries.rutgers.edu/rutgers-lib/51334/
Chicago Manual of Style (16th Edition):
Kolar, Sudarshan, 1990-. “Modeling, system analysis and control of a proton exchange membrane fuel cell.” 2016. Masters Thesis, Rutgers University. Accessed January 18, 2021.
https://rucore.libraries.rutgers.edu/rutgers-lib/51334/.
MLA Handbook (7th Edition):
Kolar, Sudarshan, 1990-. “Modeling, system analysis and control of a proton exchange membrane fuel cell.” 2016. Web. 18 Jan 2021.
Vancouver:
Kolar, Sudarshan 1. Modeling, system analysis and control of a proton exchange membrane fuel cell. [Internet] [Masters thesis]. Rutgers University; 2016. [cited 2021 Jan 18].
Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/51334/.
Council of Science Editors:
Kolar, Sudarshan 1. Modeling, system analysis and control of a proton exchange membrane fuel cell. [Masters Thesis]. Rutgers University; 2016. Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/51334/
Rutgers University
6.
Kumar, Manonit.
Characterizing the GlusterFS file system for software defined network research.
Degree: MS, Electrical and Computer Engineering, 2015, Rutgers University
URL: https://rucore.libraries.rutgers.edu/rutgers-lib/46377/
► With the rapid rise of online resources such as those o ered by Google, Dropbox and Mi- crosoft cloud computing is playing a bigger part…
(more)
▼ With the rapid rise of online resources such as those o ered by Google, Dropbox and Mi- crosoft cloud computing is playing a bigger part in everyday lives than most people can imagine. More and more services are being o ered online even in academia and science terabytes of data is collected during experiments and this data has to be stored and pro- visioned across various geographical locations. This is achieved through distributed le systems and software de ned networks is a new paradigm that provides interesting ways to improve these Distributed File systems. In order to understand the potential impact of SDN usage on distributed le systems this work has set out to characterize GlusterFS in certain con gurations by emulating a realistic distributed load on the le system. Software De ned Networks as opposed to traditional networks are not static, in the sense that the system can manage data bandwidth and balance data loads according to requirements and cost. This work measures the performance in units of throughput in KB per second along with graphs of network activity from empirical executions to understand GlusterFS in more detail. Experimental results of introducing SDN into GlusterFS yeilded very good results. Signi - cant gains in the range of 45% - 60% in the quality of service were observed during manual manipulation of the network.
Advisors/Committee Members: Rodero, Ivan (chair), Gajic, Zoran (internal member), Parashar, Manish (internal member).
Subjects/Keywords: Cloud computing; Electronic data processing – Distributed processing; Computer network architectures
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APA (6th Edition):
Kumar, M. (2015). Characterizing the GlusterFS file system for software defined network research. (Masters Thesis). Rutgers University. Retrieved from https://rucore.libraries.rutgers.edu/rutgers-lib/46377/
Chicago Manual of Style (16th Edition):
Kumar, Manonit. “Characterizing the GlusterFS file system for software defined network research.” 2015. Masters Thesis, Rutgers University. Accessed January 18, 2021.
https://rucore.libraries.rutgers.edu/rutgers-lib/46377/.
MLA Handbook (7th Edition):
Kumar, Manonit. “Characterizing the GlusterFS file system for software defined network research.” 2015. Web. 18 Jan 2021.
Vancouver:
Kumar M. Characterizing the GlusterFS file system for software defined network research. [Internet] [Masters thesis]. Rutgers University; 2015. [cited 2021 Jan 18].
Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/46377/.
Council of Science Editors:
Kumar M. Characterizing the GlusterFS file system for software defined network research. [Masters Thesis]. Rutgers University; 2015. Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/46377/
Rutgers University
7.
Jabbar, Sadiq.
Antennas re-clustering and target handoff for multiple radars system.
Degree: MS, Electrical and Computer Engineering, 2017, Rutgers University
URL: https://rucore.libraries.rutgers.edu/rutgers-lib/52212/
► Widely distributed multiple radar systems have been shown to offer enhanced localization performance. With smaller radar footprint, the ability to employ larger number of transmit…
(more)
▼ Widely distributed multiple radar systems have been shown to offer enhanced localization performance. With smaller radar footprint, the ability to employ larger number of transmit and receive antennas opens new opportunities. In previous research, a subset selection scheme has been proposed for antenna clustering that minimizes the number of transmit and receive antennas required to achieve a preset accuracy performance. The study indicated that some transmit and receive antenna pairs contribute more than others to the localization performance. This thesis concentrates on handoff techniques that enable the transition of target tracking from one antenna cluster to another. As a target moves in an area covered by a grid of multiple radars, its relative position with respect to an existing tracking antenna cluster (or antenna subset) is changing, affecting the accuracy capabilities of the existing antenna cluster. Thus, at some point, there is a need to update the antenna cluster, keeping a useful antenna subset while replacing other antennas with ones that will keep localization accuracy within a given range. Re-clustering methods are proposed to address target handoff within antennas belonging to a larger grid. Low complexity re-clustering algorithms are proposed for handoff purposes which enable a constrained replacement of antennas. These fast approximation algorithms are based on the optimization of the Cramer Rao bound (CRB) and constrained by the number of antennas that may be replaced at any given time. It is shown that this method performs close to optimal and can be implemented in a decentralized fashion.
Advisors/Committee Members: Godrich, Hana (chair), Gajic, Zoran (internal member), Caggiano, Michael (internal member).
Subjects/Keywords: Radar – Antennas; Antenna arrays
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APA (6th Edition):
Jabbar, S. (2017). Antennas re-clustering and target handoff for multiple radars system. (Masters Thesis). Rutgers University. Retrieved from https://rucore.libraries.rutgers.edu/rutgers-lib/52212/
Chicago Manual of Style (16th Edition):
Jabbar, Sadiq. “Antennas re-clustering and target handoff for multiple radars system.” 2017. Masters Thesis, Rutgers University. Accessed January 18, 2021.
https://rucore.libraries.rutgers.edu/rutgers-lib/52212/.
MLA Handbook (7th Edition):
Jabbar, Sadiq. “Antennas re-clustering and target handoff for multiple radars system.” 2017. Web. 18 Jan 2021.
Vancouver:
Jabbar S. Antennas re-clustering and target handoff for multiple radars system. [Internet] [Masters thesis]. Rutgers University; 2017. [cited 2021 Jan 18].
Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/52212/.
Council of Science Editors:
Jabbar S. Antennas re-clustering and target handoff for multiple radars system. [Masters Thesis]. Rutgers University; 2017. Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/52212/
Rutgers University
8.
Powar, Gayatri, 1988-.
Calculation of collision probability for autonomous vehicles using trajectory prediction.
Degree: MS, Electrical and Computer Engineering, 2016, Rutgers University
URL: https://rucore.libraries.rutgers.edu/rutgers-lib/51437/
► The aim of this thesis is to create a decision making algorithm. The goal would be to check the feasibility of the current maneuver by…
(more)
▼ The aim of this thesis is to create a decision making algorithm. The goal would be to check the feasibility of the current maneuver by nding the probability of collision between the subject and target vehicles. These outputs can be used by other Advanced Driver Assistance System (ADAS) features including path planner, lateral control, longitudinal control, etc. We make use of some sensors like camera/radar (simulated data) and fuse these together for better estimation of measurements. With earlier experience with cameras, they are really poor at giving longitudinal distances whereas radars give more accurate measurements longitudinally. Using these measurements about targets ahead in the environment, we predict the trajectories of the obstacles/targets as well as the subject vehicle (autonomous vehicle). The algorithm predicts if it is safe to continue with the current maneuver in the near future for several seconds ahead of time, and makes the decision if the maneuver is possible. The results are obtained using probabilistic approach whether the future trajectories are going to collide. The thesis primarily focuses on target tracking, e cient sensor data fusion and future collision estimation. With the lessons learnt using existing literature an e cient approach is employed. The simulation is performed in PreScan simulator and MATLAB. Enhancements in the sensor data fusion using standby measurements and quasi-decentralized approach to combine measurements to yield improved results and achieve better scalability are proposed and implemented.
Advisors/Committee Members: Gajic, Zoran (chair), Lindqvist, Janne (internal member), Baruh, Haim (internal member).
Subjects/Keywords: Autonomous vehicles
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APA (6th Edition):
Powar, Gayatri, 1. (2016). Calculation of collision probability for autonomous vehicles using trajectory prediction. (Masters Thesis). Rutgers University. Retrieved from https://rucore.libraries.rutgers.edu/rutgers-lib/51437/
Chicago Manual of Style (16th Edition):
Powar, Gayatri, 1988-. “Calculation of collision probability for autonomous vehicles using trajectory prediction.” 2016. Masters Thesis, Rutgers University. Accessed January 18, 2021.
https://rucore.libraries.rutgers.edu/rutgers-lib/51437/.
MLA Handbook (7th Edition):
Powar, Gayatri, 1988-. “Calculation of collision probability for autonomous vehicles using trajectory prediction.” 2016. Web. 18 Jan 2021.
Vancouver:
Powar, Gayatri 1. Calculation of collision probability for autonomous vehicles using trajectory prediction. [Internet] [Masters thesis]. Rutgers University; 2016. [cited 2021 Jan 18].
Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/51437/.
Council of Science Editors:
Powar, Gayatri 1. Calculation of collision probability for autonomous vehicles using trajectory prediction. [Masters Thesis]. Rutgers University; 2016. Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/51437/
Rutgers University
9.
Singh, Pratul Kumar, 1986-.
Design of a robotic bio-sampler and localization improvement for underwater autonomous gliders.
Degree: MS, Electrical and Computer Engineering, 2014, Rutgers University
URL: https://rucore.libraries.rutgers.edu/rutgers-lib/44229/
► This thesis comprises two parts, the first part presents the development of a robotic platform to function as a biological sampler compatible with the Slocum…
(more)
▼ This thesis comprises two parts, the first part presents the development of a robotic platform to function as a biological sampler compatible with the Slocum Underwater Autonomous Glider (UAG). The second part presents a localization algorithm to improve positioning estimation of the glider underwater. The ocean is very critical to life on earth yet 95% of it still remains unexplored. Hence, scientists all over the world have been deeply interested in understanding all the features of the ocean. One such feature which still remains unclear is how a diverse bacterial community transitions between seasons in a coastal ecosystem and how this transition affects the global biogeochemical cycles. This is because of our inability to collect water sample at the right time and space in these ecosystems to resolve the processes influencing the microbiota. One of the reasons for this inability is the lack of a component capable of collecting and returning intact biomass to the laboratory for molecular ecology studies. To meet this requirement, the first part of this thesis aims at development of a robotic platform called the bio-sampler to address fundamental questions in marine ecology and to elucidate the mechanisms supporting the diversity of microorganisms in the ocean. Our aim is to have the bio-sampler installed in the science bay of the glider. Such a mobile platform is capable of in-situ sampling and preservation on a range of spatial scales. Using the bio-sampler we demonstrated autonomous filtration of samples and running our preservation process on them. We also conducted contamination and sample preservation tests to validate the functioning of this robotic platform. The results confirmed that the bio-sampler was able to perform sample preservation without carrying any water sample from previous sample to the next one. The results also confirmed that the bio-sampler did not cause any cross-contamination between samples. In the second part of this thesis, we try to improve the localization of the Slocum glider. Underwater autonomous gliders such as the Slocum glider provide an effective platform for marine and coastal scientists for conducting exploration missions which may last several weeks or even months. However, localization of these gliders underwater is a challenging task based only on the sensors on-board these gliders. Also these gliders move slowly, with an average horizontal velocity of around 0.2 - 0.3 m/s and hence are vulnerable to ocean currents. When these gliders resurface, they receive GPS signals to identify their position. Since they mostly run underwater this makes it difficult to obtain accurate positioning of the glider. The new localization scheme is based upon the dynamic model of the glider fused with on-board sensor measurements like depths and yaw angles. The experimental results have shown that the new localization scheme improves the position estimation of the glider without using any new sensors apart from the ones which are already on the glider.
Advisors/Committee Members: Yi, Jingang (chair), Gajic, Zoran (internal member), ZAO, QUINGZE (internal member).
Subjects/Keywords: Underwater gliders; Water – Sampling; Coastal ecosystem health
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APA (6th Edition):
Singh, Pratul Kumar, 1. (2014). Design of a robotic bio-sampler and localization improvement for underwater autonomous gliders. (Masters Thesis). Rutgers University. Retrieved from https://rucore.libraries.rutgers.edu/rutgers-lib/44229/
Chicago Manual of Style (16th Edition):
Singh, Pratul Kumar, 1986-. “Design of a robotic bio-sampler and localization improvement for underwater autonomous gliders.” 2014. Masters Thesis, Rutgers University. Accessed January 18, 2021.
https://rucore.libraries.rutgers.edu/rutgers-lib/44229/.
MLA Handbook (7th Edition):
Singh, Pratul Kumar, 1986-. “Design of a robotic bio-sampler and localization improvement for underwater autonomous gliders.” 2014. Web. 18 Jan 2021.
Vancouver:
Singh, Pratul Kumar 1. Design of a robotic bio-sampler and localization improvement for underwater autonomous gliders. [Internet] [Masters thesis]. Rutgers University; 2014. [cited 2021 Jan 18].
Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/44229/.
Council of Science Editors:
Singh, Pratul Kumar 1. Design of a robotic bio-sampler and localization improvement for underwater autonomous gliders. [Masters Thesis]. Rutgers University; 2014. Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/44229/
Rutgers University
10.
Gopala, Prashanth Kumar, 1986-.
Sliding mode control of discrete-time weakly coupled systems.
Degree: MS, Electrical and Computer Engineering, 2011, Rutgers University
URL: http://hdl.rutgers.edu/1782.1/rucore10001600001.ETD.000057586
► Sliding mode control is a form of variable structure control which is a powerful tool to cope with external disturbances and uncertainty. There are many…
(more)
▼ Sliding mode control is a form of variable structure control which is a powerful tool to cope with external disturbances and uncertainty. There are many applications of sliding mode control of weakly coupled system to absorption columns, catalytic crackers, chemical plants, chemical reactors, helicopters, satellites, flexible beams, cold-rolling mills, power systems, electrical circuits, computer/communication networks, etc. In this thesis, the problem of sliding mode control for systems, which are composed of two weakly coupled subsystems, is addressed. This thesis presents several methods to apply sliding mode control to linear discretetime weakly-coupled systems and di fferent approaches to decouple the sub-systems. The application of Utkin and Young's sliding mode control method on discrete-time weakly-coupled systems is studied in detail which is then compared with other control algorithms while emphasizing the importance of the decoupling technique in each case. It also presents the possibility of integrating two or more control strategies for a single system; one for each sub-system, depending upon the respective requirements and constraints. In this thesis, the eff ectiveness of the proposed methods is demonstrated through theory and simulation results.
Advisors/Committee Members: Gopala, Prashanth Kumar, 1986- (author), Gajic, Zoran (chair), Pompili, Dario (internal member), Spasojevic, Predrag (internal member).
Subjects/Keywords: Sliding mode control; Coupled mode theory; Discrete-time systems
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APA (6th Edition):
Gopala, Prashanth Kumar, 1. (2011). Sliding mode control of discrete-time weakly coupled systems. (Masters Thesis). Rutgers University. Retrieved from http://hdl.rutgers.edu/1782.1/rucore10001600001.ETD.000057586
Chicago Manual of Style (16th Edition):
Gopala, Prashanth Kumar, 1986-. “Sliding mode control of discrete-time weakly coupled systems.” 2011. Masters Thesis, Rutgers University. Accessed January 18, 2021.
http://hdl.rutgers.edu/1782.1/rucore10001600001.ETD.000057586.
MLA Handbook (7th Edition):
Gopala, Prashanth Kumar, 1986-. “Sliding mode control of discrete-time weakly coupled systems.” 2011. Web. 18 Jan 2021.
Vancouver:
Gopala, Prashanth Kumar 1. Sliding mode control of discrete-time weakly coupled systems. [Internet] [Masters thesis]. Rutgers University; 2011. [cited 2021 Jan 18].
Available from: http://hdl.rutgers.edu/1782.1/rucore10001600001.ETD.000057586.
Council of Science Editors:
Gopala, Prashanth Kumar 1. Sliding mode control of discrete-time weakly coupled systems. [Masters Thesis]. Rutgers University; 2011. Available from: http://hdl.rutgers.edu/1782.1/rucore10001600001.ETD.000057586
Rutgers University
11.
Somers, William, 1987-.
Doppler-based localization for mobile autonomous underwater vehicles.
Degree: MS, Electrical and Computer Engineering, 2011, Rutgers University
URL: http://hdl.rutgers.edu/1782.1/rucore10001600001.ETD.000057690
► A novel algorithm for localization of Autonomous Underwater Vehicles (AUVs) operating in under-the-ice environments is proposed along with a mathematical analysis for the same. The…
(more)
▼ A novel algorithm for localization of Autonomous Underwater Vehicles (AUVs) operating in under-the-ice environments is proposed along with a mathematical analysis for the same. The objective is to accurately predict the position of a mobile AUV via cooperation with neighboring vehicles by utilizing a Doppler-based approach. Current existing localization techniques require either an anchor or surfacing AUV to acquire a GPS fix or rely on a system of expensive and difficult to deploy hardware. Our Doppler-based approach is based on observed Doppler shifts, which are measured opportunistically from ongoing communications between AUVs. These observed Doppler shifts can be used to project the subsequent positions of the AUV and limit the internal uncertainty associated with traditional localization techniques. An AUV's internal uncertainty is the uncertainty in the position of a mobile vehicle as estimated by itself, e.g., via localization techniques. In addition, this Doppler-based approach has minimal network overhead when compared to traditional localization techniques and does not require synchronization between AUVs. The main focus of this thesis is to quantify (via simulations) the solution behavior as well as its sensitivity to possible sources of errors.
Advisors/Committee Members: Somers, William, 1987- (author), Pompili, Dario (chair), Gajic, Zoran (co-chair), Marsic, Ivan (co-chair).
Subjects/Keywords: Submersibles; Doppler tracking; Sensor networks; Acoustic localization
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APA (6th Edition):
Somers, William, 1. (2011). Doppler-based localization for mobile autonomous underwater vehicles. (Masters Thesis). Rutgers University. Retrieved from http://hdl.rutgers.edu/1782.1/rucore10001600001.ETD.000057690
Chicago Manual of Style (16th Edition):
Somers, William, 1987-. “Doppler-based localization for mobile autonomous underwater vehicles.” 2011. Masters Thesis, Rutgers University. Accessed January 18, 2021.
http://hdl.rutgers.edu/1782.1/rucore10001600001.ETD.000057690.
MLA Handbook (7th Edition):
Somers, William, 1987-. “Doppler-based localization for mobile autonomous underwater vehicles.” 2011. Web. 18 Jan 2021.
Vancouver:
Somers, William 1. Doppler-based localization for mobile autonomous underwater vehicles. [Internet] [Masters thesis]. Rutgers University; 2011. [cited 2021 Jan 18].
Available from: http://hdl.rutgers.edu/1782.1/rucore10001600001.ETD.000057690.
Council of Science Editors:
Somers, William 1. Doppler-based localization for mobile autonomous underwater vehicles. [Masters Thesis]. Rutgers University; 2011. Available from: http://hdl.rutgers.edu/1782.1/rucore10001600001.ETD.000057690
Rutgers University
12.
Vora, Ateet.
A hierarchical task analysis software tool based on the model-view-controller architecture pattern.
Degree: MS, Electrical and Computer Engineering, 2011, Rutgers University
URL: http://hdl.rutgers.edu/1782.1/rucore10001600001.ETD.000057706
► Hierarchical Task Analysis is a systematic method of describing how work is organized in order to meet the overall objective of the job. It involves…
(more)
▼ Hierarchical Task Analysis is a systematic method of describing how work is organized in order to meet the overall objective of the job. It involves identifying, in a top-down approach, the overall goal of the task, then the various sub-tasks and then the conditions under which they should be carried out to achieve the goal. In this thesis, we set out to design and develop a simple, robust and flexible hierarchical task analysis software tool. We provide an intuitive user interface to create hierarchical tasks, additionally we provide features which are not available in existing tools like - the ability to reuse the task analysis data as templates, import or export Xml, store task and sub-tasks for reusability. These new features serve to improve time efficiency, compatibility with applications developed using other platforms and the ease with which the tool can be extended by adding new features. We use the Model-View-Controller (MVC) software architecture pattern since it is suitable for applications with a user-interface and at the same time aids in developing highly scalable and extensible applications. We produce simulation results to project the functionalities of our tool and also discuss some non-functional requirements, such as usability, scalability and extensibility.
Advisors/Committee Members: Vora, Ateet (author), Marsic, Ivan (chair), Gajic, Zoran (co-chair), Pompili, Dario (co-chair).
Subjects/Keywords: Task analysis – Design; Software architecture
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APA (6th Edition):
Vora, A. (2011). A hierarchical task analysis software tool based on the model-view-controller architecture pattern. (Masters Thesis). Rutgers University. Retrieved from http://hdl.rutgers.edu/1782.1/rucore10001600001.ETD.000057706
Chicago Manual of Style (16th Edition):
Vora, Ateet. “A hierarchical task analysis software tool based on the model-view-controller architecture pattern.” 2011. Masters Thesis, Rutgers University. Accessed January 18, 2021.
http://hdl.rutgers.edu/1782.1/rucore10001600001.ETD.000057706.
MLA Handbook (7th Edition):
Vora, Ateet. “A hierarchical task analysis software tool based on the model-view-controller architecture pattern.” 2011. Web. 18 Jan 2021.
Vancouver:
Vora A. A hierarchical task analysis software tool based on the model-view-controller architecture pattern. [Internet] [Masters thesis]. Rutgers University; 2011. [cited 2021 Jan 18].
Available from: http://hdl.rutgers.edu/1782.1/rucore10001600001.ETD.000057706.
Council of Science Editors:
Vora A. A hierarchical task analysis software tool based on the model-view-controller architecture pattern. [Masters Thesis]. Rutgers University; 2011. Available from: http://hdl.rutgers.edu/1782.1/rucore10001600001.ETD.000057706
Rutgers University
13.
Thareja, Rohit, 1986-.
Implementation and performance analysis of a
multi-meshed tree routing protocol for MANETs.
Degree: MS, Electrical and Computer Engineering, 2011, Rutgers University
URL: http://hdl.rutgers.edu/1782.1/rucore10001600001.ETD.000057699
► As the importance of mobile data connectivity in our daily lives increases, there has been an accompanying increase in the demand for rapidly deployable, short-lived…
(more)
▼ As the importance of mobile data connectivity in our daily lives increases, there has been an accompanying increase in the demand for rapidly deployable, short-lived networks which operate without any base infrastructure. This is where Mobile-ad-hoc Networks step in to turn the dream of getting connected anywhere and at any time into a reality and are fast being adopted into civilian applications like vehicular networks and location-based advertising. They have several advantages over infrastructure based wireless networks (like cellular networks) in terms of cost of deployment, ability to use unlicensed bands, etc. However, they are still plagued with several constraints mainly brought about by their dynamic nature. The main concern here is the use of an efficient routing protocol which must be adaptive and able to maintain routes in spite of the changing network connectivity. In this work we investigate a recently-proposed cluster-based routing protocol which utilizes both mesh and tree concepts and aims at minimizing the control overhead required in the setup and maintenance of the network while maintaining robust connectivity. This hybrid protocol, called Multi-Meshed Tree routing protocol, has a unique way of addressing the issues of dynamic adaptation and enhanced connectivity through a hierarchical cluster-based approach along with Virtual Identifiers. Its main advantage over the various other MANET protocols developed is its algorithm simplicity and low message complexity suited for these limited bandwidth, limited power, resource constrained networks. The focus of this work is implementing this protocol (to work with the ns2 simulator), understanding its advantages and conducting some preliminary simulation based comparisons with prevalent Mobile ad-hoc network protocols. We looked at comparison with AODV, DSDV and DSR Protocols and observed MMT to exhibit more resilient connectivity due to redundant routes, particularly for larger sized networks. Further, there was roughly a 1/6th reduction in routing overhead when compared to proactive protocols. We also studied the effects of configurability of cluster size and inherent non-optimality of routes associated with MMT. We foresee the increased use of MANETS in our daily lives, and hope that the advantages of this routing protocol are utilized for future applications.
Advisors/Committee Members: Thareja, Rohit, 1986- (author), Marsic, Ivan (chair), Pompili, Dario (internal member), Gajic, Zoran (internal member).
Subjects/Keywords: Ad hoc networks (Computer networks); Routing protocols (Computer network protocols)
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APA (6th Edition):
Thareja, Rohit, 1. (2011). Implementation and performance analysis of a
multi-meshed tree routing protocol for MANETs. (Masters Thesis). Rutgers University. Retrieved from http://hdl.rutgers.edu/1782.1/rucore10001600001.ETD.000057699
Chicago Manual of Style (16th Edition):
Thareja, Rohit, 1986-. “Implementation and performance analysis of a
multi-meshed tree routing protocol for MANETs.” 2011. Masters Thesis, Rutgers University. Accessed January 18, 2021.
http://hdl.rutgers.edu/1782.1/rucore10001600001.ETD.000057699.
MLA Handbook (7th Edition):
Thareja, Rohit, 1986-. “Implementation and performance analysis of a
multi-meshed tree routing protocol for MANETs.” 2011. Web. 18 Jan 2021.
Vancouver:
Thareja, Rohit 1. Implementation and performance analysis of a
multi-meshed tree routing protocol for MANETs. [Internet] [Masters thesis]. Rutgers University; 2011. [cited 2021 Jan 18].
Available from: http://hdl.rutgers.edu/1782.1/rucore10001600001.ETD.000057699.
Council of Science Editors:
Thareja, Rohit 1. Implementation and performance analysis of a
multi-meshed tree routing protocol for MANETs. [Masters Thesis]. Rutgers University; 2011. Available from: http://hdl.rutgers.edu/1782.1/rucore10001600001.ETD.000057699
Rutgers University
14.
Nayyar, Vidur, 1989-.
RFID SmartTag.
Degree: MS, Electrical and Computer Engineering, 2017, Rutgers University
URL: https://rucore.libraries.rutgers.edu/rutgers-lib/52243/
► This thesis presents a method to improve the accuracy of detecting movement and use of medical instruments in the trauma bay by integrating sensing capability…
(more)
▼ This thesis presents a method to improve the accuracy of detecting movement and use of medical instruments in the trauma bay by integrating sensing capability into the pre-existing passive RFID tags. Adding the sensing capability to the passive RFID tags gives it the capability to be aware of motion and users touch. The semi-passive sensor equipped Gen2 tag is comprised of an ultra-low-power microcontroller, capacitive touch sensor, 3-axis accelerometer and a Gen2 I2C-RFID chip. All the components are being operated at a very strict power constraint that has an expected lifetime of close to 1 year when equipped with a small 225-mAh coin battery. This sensor enabled RFID tag is used in the trauma bay to track motion and activity by sensing different environmental and physiological data. This thesis is comprised of the complete design documentation and explanation of the algorithms used in development of the RFID SmartTag. The accuracy and power consumption of the various sensors used and of the final version of the RFID SmartTag were tested and the results were documented.
Advisors/Committee Members: Marsic, Ivan (chair), Gajic, Zoran (internal member), Bajwa, Waheed U. (internal member).
Subjects/Keywords: Radio frequency identification systems; Detectors
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APA (6th Edition):
Nayyar, Vidur, 1. (2017). RFID SmartTag. (Masters Thesis). Rutgers University. Retrieved from https://rucore.libraries.rutgers.edu/rutgers-lib/52243/
Chicago Manual of Style (16th Edition):
Nayyar, Vidur, 1989-. “RFID SmartTag.” 2017. Masters Thesis, Rutgers University. Accessed January 18, 2021.
https://rucore.libraries.rutgers.edu/rutgers-lib/52243/.
MLA Handbook (7th Edition):
Nayyar, Vidur, 1989-. “RFID SmartTag.” 2017. Web. 18 Jan 2021.
Vancouver:
Nayyar, Vidur 1. RFID SmartTag. [Internet] [Masters thesis]. Rutgers University; 2017. [cited 2021 Jan 18].
Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/52243/.
Council of Science Editors:
Nayyar, Vidur 1. RFID SmartTag. [Masters Thesis]. Rutgers University; 2017. Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/52243/
Rutgers University
15.
Liu, Jiangbo, 1987-.
Optimal and learning-based output tracking with non-periodic tracking-transition: application to high-speed probe-based nanofabrication.
Degree: PhD, Mechanical and Aerospace Engineering, 2017, Rutgers University
URL: https://rucore.libraries.rutgers.edu/rutgers-lib/53690/
► High-speed precision tracking is needed in a wide variety of motion control applications ranging from high-speed AFM(Atomic Force Microscope) operation, high-throughput manufacturing, to robotic operations.…
(more)
▼ High-speed precision tracking is needed in a wide variety of motion control applications ranging from high-speed AFM(Atomic Force Microscope) operation, high-throughput manufacturing, to robotic operations. Challenges still exist in high-speed precision control of systems such as smart actuators with coupled hysteresis and dynamics. Although output tracking has been well-studied for linear systems, tracking with non-periodic tracking-transition switching for non-minimum phase linear systems still remains challenging, especially when multiple control objectives need to be achieved, including smooth transition from one output tracking session to the next one without inducing post-transition oscillations, input energy minimization without saturation under input amplitude constraint, and furthermore, minimization of the overall transition time. Moreover, further difficulties also arise in exploring the advantages of iterative learning control (ILC) in achieving precision but robust output tracking at high-speed to non-repetitive applications with online-generated desired trajectory, particularly for systems with complicated input-output behavior such as Hammerstein systems. The ILC framework can be extended, although for linear systems, to non-periodic output tracking via the superposition principle (SP), where the system response (output) to a linear combination of inputs equals to the same linear combination of the outputs to each individual inputs. Exploring the notion of the SP beyond linear systems is largely limited, as the nonlinearities are difficult to be modeled effectively and accurately. Therefore, challenges still exist in high-speed precision output tracking in emerging applications. In this dissertation, a multi-objective optimal tracking/transition under input constraints for non-periodic tracking/transition switching problem, and a learning-based approach for tracking control of Hammerstein systems are proposed. An approach to extend the previous work on smooth output transition and smooth tracking/transition switching to further achieve minimization of both input-energy and transition time under input amplitude constraints is proposed. The constrained input optimization problem is converted to an unconstrained input minimization problem, and then solved by utilizing an improved conjugate gradient method. The total transition time is further minimized via one dimensional search. The almost superposition of Hammerstein systems (ASHS) is developed, and then exploited for precision control of hysteresis-Hammerstein systems. We showed that for Hammerstein operator satisfying a Lipschitz condition, a weak form of the ASHS – the linear combination of outputs approaches to the response to the linear combination of the corresponding inputs with a different set of combination coefficients – exists when there are enough output elements. The strict form of the ASHS – the coefficients of the output and the input combination match to each other exactly – holds for a certain choice of the inputs. The number of…
Advisors/Committee Members: Zou, Qingze (chair), Benaroya, Haym (internal member), Yi, Jingang (internal member), Gajic, Zoran (outside member).
Subjects/Keywords: Production control; Automatic tracking
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APA (6th Edition):
Liu, Jiangbo, 1. (2017). Optimal and learning-based output tracking with non-periodic tracking-transition: application to high-speed probe-based nanofabrication. (Doctoral Dissertation). Rutgers University. Retrieved from https://rucore.libraries.rutgers.edu/rutgers-lib/53690/
Chicago Manual of Style (16th Edition):
Liu, Jiangbo, 1987-. “Optimal and learning-based output tracking with non-periodic tracking-transition: application to high-speed probe-based nanofabrication.” 2017. Doctoral Dissertation, Rutgers University. Accessed January 18, 2021.
https://rucore.libraries.rutgers.edu/rutgers-lib/53690/.
MLA Handbook (7th Edition):
Liu, Jiangbo, 1987-. “Optimal and learning-based output tracking with non-periodic tracking-transition: application to high-speed probe-based nanofabrication.” 2017. Web. 18 Jan 2021.
Vancouver:
Liu, Jiangbo 1. Optimal and learning-based output tracking with non-periodic tracking-transition: application to high-speed probe-based nanofabrication. [Internet] [Doctoral dissertation]. Rutgers University; 2017. [cited 2021 Jan 18].
Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/53690/.
Council of Science Editors:
Liu, Jiangbo 1. Optimal and learning-based output tracking with non-periodic tracking-transition: application to high-speed probe-based nanofabrication. [Doctoral Dissertation]. Rutgers University; 2017. Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/53690/
Rutgers University
16.
Bonna, Kareem Y., 1986-.
On the performance of subspace SIMO blind channel identification methods.
Degree: MS, Electrical and Computer Engineering, 2017, Rutgers University
URL: https://rucore.libraries.rutgers.edu/rutgers-lib/55385/
► Channel Identification is an important part of wireless communication systems. Radio-Frequency (RF) signals are subject to reflection, refraction, and diffraction, attenuation, and other effects, that…
(more)
▼ Channel Identification is an important part of wireless communication systems. Radio-Frequency (RF) signals are subject to reflection, refraction, and diffraction, attenuation, and other effects, that result in a distorted signal at a receiver, particularly over what are known as frequency-selective channels. Traditionally, such distortion is estimated using a ``training sequence" which is a known reference signal used to estimate, and then correct for, the distortion. However, use of training sequences is not always possible, for example in military applications where the source signal is not known, or in broadcast environments where there is a high cost of transmitting a signal. One potential solution is to estimate the channel blindly, that is, without knowledge of the transmitted signal. Blind Channel Identification (BCI) and Equalization has been a extensive topic of research since at least 1975. One strategy in Blind Channel Identification is to use the structure of the received signals in a Single Input Multiple Output (SIMO) system to estimate the channel. Research has occurred on a number of methods that exploit this in the past several decades. The subspace methods form the channel estimate in terms of a one-dimensional subspace constructed using the estimated second-order statistics of the received signals. Additionally, the use of sparsity in signal estimation has been a topic of interest as well, and has recently been used in certain cases to improve the robustness of the subspace methods in a number of works. In this thesis, the Cross-Relations and Noise-Subspace methods, both of which are SIMO BCI methods, as well as their sparse variant, are examined for a deterministic channel. The expected Normalized Projection Misalignment (NPM) is analytically approximated for all considered methods. In addition, it is compared to simulation results for a random source signal and several measured RF channels from earlier literature. Finally, the sensitivity of the sparse variant of the subspace methods as a function of the regularization parameter is studied using simulation for a set of measured RF channels from earlier literature.
Advisors/Committee Members: Spasojevic, Predrag (chair), Gajic, Zoran (internal member), Yates, Roy (internal member), School of Graduate Studies.
Subjects/Keywords: Radio frequency
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APA (6th Edition):
Bonna, Kareem Y., 1. (2017). On the performance of subspace SIMO blind channel identification methods. (Masters Thesis). Rutgers University. Retrieved from https://rucore.libraries.rutgers.edu/rutgers-lib/55385/
Chicago Manual of Style (16th Edition):
Bonna, Kareem Y., 1986-. “On the performance of subspace SIMO blind channel identification methods.” 2017. Masters Thesis, Rutgers University. Accessed January 18, 2021.
https://rucore.libraries.rutgers.edu/rutgers-lib/55385/.
MLA Handbook (7th Edition):
Bonna, Kareem Y., 1986-. “On the performance of subspace SIMO blind channel identification methods.” 2017. Web. 18 Jan 2021.
Vancouver:
Bonna, Kareem Y. 1. On the performance of subspace SIMO blind channel identification methods. [Internet] [Masters thesis]. Rutgers University; 2017. [cited 2021 Jan 18].
Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/55385/.
Council of Science Editors:
Bonna, Kareem Y. 1. On the performance of subspace SIMO blind channel identification methods. [Masters Thesis]. Rutgers University; 2017. Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/55385/
Rutgers University
17.
Mathur, Siddarth, 1993-.
Low latency CDMA-based protocol to support IoT traffic in 5g.
Degree: MS, Electrical and Computer Engineering, 2017, Rutgers University
URL: https://rucore.libraries.rutgers.edu/rutgers-lib/55585/
► The upcoming 5th generation mobile network architecture is envisioned to deploy massive Internet-of-Things (IoTs) devices with a variety of traffic patterns. These devices will often…
(more)
▼ The upcoming 5th generation mobile network architecture is envisioned to deploy massive Internet-of-Things (IoTs) devices with a variety of traffic patterns. These devices will often transmit short sporadic messages, which are not well suited to the connection-oriented modes associated with legacy 3GPP networks resulting in high service latency and excessive control overhead. This thesis presents the design of a low latency MAC (Medium Access Layer) / PHY (Physical Layer) protocol for emerging Internet of Things (IoT) devices that require low access delay. The goal is to operate in the same band as current LTE, thus not requiring any separate channel allocation, while maintaining backward compatibility with the current LTE system. The physical layer access is achieved using an underlay CDMA-based low power transmission scheme, which operates in the same frequency range as the LTE's uplink/downlink frequencies. The MAC layer is designed for low access latency by transmitting small sized data in a random access mode as it becomes available, eliminating the need to setup a connection.par A proof of concept prototype was developed to demonstrate the feasibility of the proposed design and the performance of the CDMA system and in presence of LTE. The CDMA based transmission was prototyped using the Software Defined Radio (SDR) platform (USRP B210/X310) and the code is written in C and C++. The LTE transmission is enabled using the OpenAirInterface (OAI) platform, which is an open sourced LTE implementation for Software Defined Radios. The performance of CDMA is studied with varying the spreading code length, message size, delay between transmitted packets, Signal to Noise Ratio (SNR). The CDMA based system is studied independently as well as in the presence of an ongoing LTE transmission. The results demonstrate that underlay burst CDMA transmissions for IoTs are capable of providing lower latency compared to LTE.The upcoming 5th generation mobile network architecture is envisioned to deploy massive Internet-of-Things (IoTs) devices with a variety of traffic patterns. These devices will often transmit short sporadic messages, which are not well suited to the connection-oriented modes associated with legacy 3GPP networks resulting in high service latency and excessive control overhead. This thesis presents the design of a low latency MAC (Medium Access Layer) / PHY (Physical Layer) protocol for emerging Internet of Things (IoT) devices that require low access delay. The goal is to operate in the same band as current LTE, thus not requiring any separate channel allocation, while maintaining backward compatibility with the current LTE system. The physical layer access is achieved using an underlay CDMA-based low power transmission scheme, which operates in the same frequency range as the LTE's uplink/downlink frequencies. The MAC layer is designed for low access latency by transmitting small sized data in a random access mode as it becomes available, eliminating the need to setup a connection.par A proof of concept…
Advisors/Committee Members: Raychaudhuri, Dipankar (chair), Gajic, Zoran (internal member), Spasojevic, Predrag (internal member), School of Graduate Studies.
Subjects/Keywords: Wireless communication systems; Code division multiple access; Internet of things
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APA (6th Edition):
Mathur, Siddarth, 1. (2017). Low latency CDMA-based protocol to support IoT traffic in 5g. (Masters Thesis). Rutgers University. Retrieved from https://rucore.libraries.rutgers.edu/rutgers-lib/55585/
Chicago Manual of Style (16th Edition):
Mathur, Siddarth, 1993-. “Low latency CDMA-based protocol to support IoT traffic in 5g.” 2017. Masters Thesis, Rutgers University. Accessed January 18, 2021.
https://rucore.libraries.rutgers.edu/rutgers-lib/55585/.
MLA Handbook (7th Edition):
Mathur, Siddarth, 1993-. “Low latency CDMA-based protocol to support IoT traffic in 5g.” 2017. Web. 18 Jan 2021.
Vancouver:
Mathur, Siddarth 1. Low latency CDMA-based protocol to support IoT traffic in 5g. [Internet] [Masters thesis]. Rutgers University; 2017. [cited 2021 Jan 18].
Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/55585/.
Council of Science Editors:
Mathur, Siddarth 1. Low latency CDMA-based protocol to support IoT traffic in 5g. [Masters Thesis]. Rutgers University; 2017. Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/55585/
Rutgers University
18.
Parthasarathy, Ramyaa, 1992-.
Modeling and assessment of energy management challenges for distributed wind farms.
Degree: MS, Electrical and Computer Engineering, 2017, Rutgers University
URL: https://rucore.libraries.rutgers.edu/rutgers-lib/55605/
► The advent of deregulation of electricity to meet the increasing load demands and the call for more efficient sustainable energy practices have dominantly amplified the…
(more)
▼ The advent of deregulation of electricity to meet the increasing load demands and the call for more efficient sustainable energy practices have dominantly amplified the need for incorporation of renewable energy systems in today’s power networks. Wind energy systems can be a leading source of renewable energy with adequate exploration into the uncertainty surrounding its dependency on climatic changes. The aim of the thesis is to analyze the potential of energy savings through the inclusion of wind energy in the already existing network. Wind, in conjunction with the conventional power generators, needs to meet the continuously varying load demand while considering the technical real-time constraints imposed by the system. The output from conventional generators is deterministic while in the case of wind, due to its stochastic nature, the output is intermittent. This is modeled by Weibull probability distribution function due to its discontinuous behavior. The first step involved in planning and operating the power system with a wind farm, is providing a load flow solution. Among various techniques, Newton-Raphson is one of the most widely used methods to calculate the total generation and line losses involved in transmission. The next step is to use the load flow solution to optimize the economic dispatch of the real power in the system. The optimal allocation of the generated power among conventional and wind units are based on the operating cost of the units and the cost of wind power. The cost of wind units accounts for various scenarios such as the penalty cost due to overestimation and underestimation of wind power and the direct cost pertaining to the issue of ownership of the wind generators. The research involved in this thesis provides a novel model for power system operation combining conventional and renewable energy along with remote energy storage systems, which are validated effectively for the proposed system. Furthermore, with the help of the Newton-Raphson load flow technique followed by economic dispatch, an efficient and economical solution is provided to determine the optimal output at the lowest cost while keeping the transmission and other operational constraints in check.
Advisors/Committee Members: Godrich, Hana (chair), Gajic, Zoran (internal member), Caggiano, Michael (internal member), School of Graduate Studies.
Subjects/Keywords: Wind power; Wind power plants – Design and construction
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APA (6th Edition):
Parthasarathy, Ramyaa, 1. (2017). Modeling and assessment of energy management challenges for distributed wind farms. (Masters Thesis). Rutgers University. Retrieved from https://rucore.libraries.rutgers.edu/rutgers-lib/55605/
Chicago Manual of Style (16th Edition):
Parthasarathy, Ramyaa, 1992-. “Modeling and assessment of energy management challenges for distributed wind farms.” 2017. Masters Thesis, Rutgers University. Accessed January 18, 2021.
https://rucore.libraries.rutgers.edu/rutgers-lib/55605/.
MLA Handbook (7th Edition):
Parthasarathy, Ramyaa, 1992-. “Modeling and assessment of energy management challenges for distributed wind farms.” 2017. Web. 18 Jan 2021.
Vancouver:
Parthasarathy, Ramyaa 1. Modeling and assessment of energy management challenges for distributed wind farms. [Internet] [Masters thesis]. Rutgers University; 2017. [cited 2021 Jan 18].
Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/55605/.
Council of Science Editors:
Parthasarathy, Ramyaa 1. Modeling and assessment of energy management challenges for distributed wind farms. [Masters Thesis]. Rutgers University; 2017. Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/55605/
Rutgers University
19.
Sridhar Dharmarajan, Karthik, 1991-.
Estimation and adaptive equalization of communications channels.
Degree: MS, Electrical and Computer Engineering, 2015, Rutgers University
URL: https://rucore.libraries.rutgers.edu/rutgers-lib/46440/
► The focus of this research is to determine the channel impulse response of a communications link and then equalize the channel to mitigate the e…
(more)
▼ The focus of this research is to determine the channel impulse response of a communications link and then equalize the channel to mitigate the e ffects of fading on the received signal. Traditionally, channel identifi cation is achieved using a deconvolution process implemented in the time-domain. An alternative method is to perform deconvolution, for the purpose of estimating communications channel structures, in the wavelet transform domain. This approach is attractive for use in agile transceivers that utilize the wavelet domain for functions such as automatic modulation recognition. An equivalent method for deconvolving discrete time-domain signals within the Discrete Wavelet Transform (DWT) framework is explained. This method of deconvolution can be applied at any level of DWT resolution from which the complete channel impulse response can be estimated. Computer simulations have been conducted to characterize the performance of the channel estimation algorithm using the Mean Square Error (MSE) criterion. The simulation experiments are performed for two di fferent channel models characterized by a Power Delay Profi le (PDP), i.e., the Gaussian PDP and the Exponential PDP. Channel conditions of slow and fast fading are considered. In addition, the faded channel output signals are corrupted by AWGN having ratios of bit energy-to-noise spectral density, Eb/N0, in the range from 0 to 30 dB. It has been found that, for both channel models, the best channel impulse response estimate is obtained from the DWT detail coe fficients at the 1st level of resolution resulting in computational effi ciency. A novel method, based on the classic LMS algorithm, has been developed for adaptive equalization of channels in the wavelet domain. Computer simulation experiments for channel equalization show that the DWT-LMS algorithm, using a Haar wavelet, performs better than the LMS algorithm for the Gaussian PDP channel in terms of the achievable bit error probabilities.
Advisors/Committee Members: Daut, David G (chair), Orfanidis, Sophocles (internal member), Gajic, Zoran (internal member).
Subjects/Keywords: Wavelets (Mathematics); Transformations (Mathematics)
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APA (6th Edition):
Sridhar Dharmarajan, Karthik, 1. (2015). Estimation and adaptive equalization of communications channels. (Masters Thesis). Rutgers University. Retrieved from https://rucore.libraries.rutgers.edu/rutgers-lib/46440/
Chicago Manual of Style (16th Edition):
Sridhar Dharmarajan, Karthik, 1991-. “Estimation and adaptive equalization of communications channels.” 2015. Masters Thesis, Rutgers University. Accessed January 18, 2021.
https://rucore.libraries.rutgers.edu/rutgers-lib/46440/.
MLA Handbook (7th Edition):
Sridhar Dharmarajan, Karthik, 1991-. “Estimation and adaptive equalization of communications channels.” 2015. Web. 18 Jan 2021.
Vancouver:
Sridhar Dharmarajan, Karthik 1. Estimation and adaptive equalization of communications channels. [Internet] [Masters thesis]. Rutgers University; 2015. [cited 2021 Jan 18].
Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/46440/.
Council of Science Editors:
Sridhar Dharmarajan, Karthik 1. Estimation and adaptive equalization of communications channels. [Masters Thesis]. Rutgers University; 2015. Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/46440/
Rutgers University
20.
Ni, Weiqing, 1994-.
Context-aware process recommendation system for medical treatment.
Degree: MS, Electrical and Computer Engineering, 2019, Rutgers University
URL: https://rucore.libraries.rutgers.edu/rutgers-lib/60037/
► AI-based recommendation systems are widely utilized in different fields including movies, music, news, social tags and products in general. Such systems may help reduce medical…
(more)
▼ AI-based recommendation systems are widely utilized in different fields including movies, music, news, social tags and products in general. Such systems may help reduce medical team errors and improve patient outcomes in treatment processes (e.g., trauma resuscitation, surgical processes) by extracting knowledge from historic data and providing online recommendations. We developed data-driven process recommender systems for trauma resuscitations process based on different models. This thesis includes three main topics: (1) process data augmentation algorithms; (2) two intention mining models; and (3) two process recommender systems. Topic (1) and (2) were developed for improving the performance of recommender systems (Topic (3)).
Our process data was collected manually by medical experts reviewing the recorded videos. The data collection was labor intensive and we coded 123 trauma patient records in the past four years. Because of the small size of our dataset, we attempted to augment it by generating synthetic data. We developed two synthetic data generators to augment our dataset: (1) alignment-based process data generator and (2) sequential generative adversarial network. Both of them can generate large amounts of semi-synthetic process data that has similar characteristics with those of real-world process data.
We used intention mining models to discover the relationship between observed treatment activities and medical team’s underlying intentions. By identifying medical team’s intentions, we are able to generate accurate recommendations. We developed
two different intention mining algorithms, one based on Hidden Markov Models and the other based on Seq2seq models.
Last, we designed the process recommendation systems using two different models, (1) Hierarchical Hidden Markov Model (HHMM) and (2) Long Short-Term Memory (LSTM). The HHMM-based recommender system utilizes the intention mining algorithm to estimate the medical team’s current intention, and then provides the process recommendation identified in that intention category. On the other hand, the LSTM-based recommender system learns the relationships from different processes. And also, the LSTM model was modified to deal with both environmental (i.e., patient demographics) and behavioral (i.e., preceding treatment activities) contextual information. To provide the process recommendation, the LSTM is iterated over the previous process trace, and uses the most likely activity as the next-step recommending process. For HHMM-based recommender system, we achieved top-1 accuracy at 34.4% and top-5 accuracy 56.9% over 102 kinds of activities. The LSTM-based recommender system showed a higher top-1 accuracy at 39.9% and top-5 accuracy 65.5%. The experimental results indicated both of out recommender systems (HHMM & LSTM) outperforms baseline models in recommendation accuracy, demonstrating the feasibility of our context-aware process recommendation systems for complex real-world medical processes.
Advisors/Committee Members: Marsic, Ivan (chair), Gajic, Zoran (internal member), Jha, Shantenu (internal member), School of Graduate Studies.
Subjects/Keywords: Artificial intelligence – Medical applications
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APA (6th Edition):
Ni, Weiqing, 1. (2019). Context-aware process recommendation system for medical treatment. (Masters Thesis). Rutgers University. Retrieved from https://rucore.libraries.rutgers.edu/rutgers-lib/60037/
Chicago Manual of Style (16th Edition):
Ni, Weiqing, 1994-. “Context-aware process recommendation system for medical treatment.” 2019. Masters Thesis, Rutgers University. Accessed January 18, 2021.
https://rucore.libraries.rutgers.edu/rutgers-lib/60037/.
MLA Handbook (7th Edition):
Ni, Weiqing, 1994-. “Context-aware process recommendation system for medical treatment.” 2019. Web. 18 Jan 2021.
Vancouver:
Ni, Weiqing 1. Context-aware process recommendation system for medical treatment. [Internet] [Masters thesis]. Rutgers University; 2019. [cited 2021 Jan 18].
Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/60037/.
Council of Science Editors:
Ni, Weiqing 1. Context-aware process recommendation system for medical treatment. [Masters Thesis]. Rutgers University; 2019. Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/60037/
Rutgers University
21.
Yu, Fangzhou, 1990-.
Design, fabrication, and characterization of polymer-based cantilever probes for atomic force microscopy of live mammalian cells in liquid.
Degree: MS, Electrical and Computer Engineering, 2016, Rutgers University
URL: https://rucore.libraries.rutgers.edu/rutgers-lib/51520/
► This thesis presents the design, fabrication, and characterization of polymer-based cantilever probes for atomic force microscopes (AFMs), in order to enable biological research requiring non-destructive…
(more)
▼ This thesis presents the design, fabrication, and characterization of polymer-based cantilever probes for atomic force microscopes (AFMs), in order to enable biological research requiring non-destructive high-speed high-resolution topographical imaging and nanomechanical characterizations of sub-cellular and cellular samples. A reliable low-cost surfacemicromachining process is developed for the rapid prototyping of bio-compatible polymer-based V-shaped AFM probes. The physical properties of fabricated prototypes, such as effective spring constant, resonant frequency, and quality factor, are determined experimentally via thermal noise method and analytically via finite element and parallel-beam approximation methods. Using a prototype, AFM nanoindentation measurements are performed on live mammalian cells— human cervical epithelial cancer cells (called “HeLa”) in a liquid culture medium. Experimental results are compared to those obtained using a commercial Si-based probe; when the prototype probe is used, the deformation and/or distortion of the cell membrane are reduced significantly albeit repeated indentations on the cell surface. For further AFM-based biological studies, the design and fabrication process of the prototype probe are fine-tuned; a reasonably straight cantilever with a strain gradient as low as 10-4 μm-1 is achieved via corrugating the optical reflection coating or confining it to the tip region, and a sharp tip with a radius of curvature as small as ~40 nm, which is comparable to that of a Si-based probe, is achieved via sequential depositions of low- and high-viscosity acrylic polymers.
Advisors/Committee Members: Jeon, Jaeseok (chair), Gajic, Zoran (internal member), Javanmard, Mehdi (internal member), Zou, Qingze (internal member).
Subjects/Keywords: Polymers; Atomic force microscopy
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APA (6th Edition):
Yu, Fangzhou, 1. (2016). Design, fabrication, and characterization of polymer-based cantilever probes for atomic force microscopy of live mammalian cells in liquid. (Masters Thesis). Rutgers University. Retrieved from https://rucore.libraries.rutgers.edu/rutgers-lib/51520/
Chicago Manual of Style (16th Edition):
Yu, Fangzhou, 1990-. “Design, fabrication, and characterization of polymer-based cantilever probes for atomic force microscopy of live mammalian cells in liquid.” 2016. Masters Thesis, Rutgers University. Accessed January 18, 2021.
https://rucore.libraries.rutgers.edu/rutgers-lib/51520/.
MLA Handbook (7th Edition):
Yu, Fangzhou, 1990-. “Design, fabrication, and characterization of polymer-based cantilever probes for atomic force microscopy of live mammalian cells in liquid.” 2016. Web. 18 Jan 2021.
Vancouver:
Yu, Fangzhou 1. Design, fabrication, and characterization of polymer-based cantilever probes for atomic force microscopy of live mammalian cells in liquid. [Internet] [Masters thesis]. Rutgers University; 2016. [cited 2021 Jan 18].
Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/51520/.
Council of Science Editors:
Yu, Fangzhou 1. Design, fabrication, and characterization of polymer-based cantilever probes for atomic force microscopy of live mammalian cells in liquid. [Masters Thesis]. Rutgers University; 2016. Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/51520/
Rutgers University
22.
Savjani, Niki.
Modeling financial markets using mixed minority/majority games.
Degree: MS, Electrical and Computer Engineering, 2011, Rutgers University
URL: http://hdl.rutgers.edu/1782.1/rucore10001600001.ETD.000063591
► Financial markets are considered to be a system formed due to the interaction between heterogeneous individuals. Many models have tried emulating it and have tried…
(more)
▼ Financial markets are considered to be a system formed due to the interaction between heterogeneous individuals. Many models have tried emulating it and have tried to uncover the working behind it. Minority Game Model is one such model which has tried to emulate it. It is a game consisting of heterogeneous agents who believe that to gain profit one needs to be in the minority. However, it has been proved that the financial market consists of both fundamentalists (i.e. individuals gaining profit by being in the minority) as well as noise traders (individuals gaining profit by following the herd). So, we have used the Mixed Game Model to emulate financial markets which consists of Minority and Majority game players. Although it has been proved that the mixed game model is a suitable model to imitate financial world, we have observed that it still has many limitations like the two groups of agents have same properties and thus they lack in heterogeneity and also that the life of each agent is constant. But in real world, every individual has a unique memory and learning ability and will join and leave the markets as well. To improve on these limitations we have created the model, “Highly Heterogeneous Model” which removes both of these limitations. Also, we show that the new improved game improves the performance of the majority game players by 2.35 % and minority game players by 4.45 %. Apart from this we observed that all the models which have emulated financial market by using Minority Game have concentrated on the combined effect of agents of financial factors like prices, returns and volatilities i.e. they are synchronous. With the availability of high frequency data, its analysis has been continuously gaining importance in recent years. We have thus also studied this behavior of market using the asynchronous form of the game known as the “Asynchronous Mixed Game Model”. We finally also prove that the Highly Heterogeneous Game represents the daily time series and the Asynchronous Mixed Game represents the high frequency time series of real financial world.
Advisors/Committee Members: Savjani, Niki (author), Marsic, Ivan (chair), Gajic, Zoran (internal member), Spasojevic, Predrag (internal member).
Subjects/Keywords: Capital market; Finance – Econometric models
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APA (6th Edition):
Savjani, N. (2011). Modeling financial markets using mixed minority/majority games. (Masters Thesis). Rutgers University. Retrieved from http://hdl.rutgers.edu/1782.1/rucore10001600001.ETD.000063591
Chicago Manual of Style (16th Edition):
Savjani, Niki. “Modeling financial markets using mixed minority/majority games.” 2011. Masters Thesis, Rutgers University. Accessed January 18, 2021.
http://hdl.rutgers.edu/1782.1/rucore10001600001.ETD.000063591.
MLA Handbook (7th Edition):
Savjani, Niki. “Modeling financial markets using mixed minority/majority games.” 2011. Web. 18 Jan 2021.
Vancouver:
Savjani N. Modeling financial markets using mixed minority/majority games. [Internet] [Masters thesis]. Rutgers University; 2011. [cited 2021 Jan 18].
Available from: http://hdl.rutgers.edu/1782.1/rucore10001600001.ETD.000063591.
Council of Science Editors:
Savjani N. Modeling financial markets using mixed minority/majority games. [Masters Thesis]. Rutgers University; 2011. Available from: http://hdl.rutgers.edu/1782.1/rucore10001600001.ETD.000063591
Rutgers University
23.
Zhang, Ruiyu, 1996-.
Multimodal attention network for trauma activity recognition from spoken language and environmental sound.
Degree: MS, Electrical and Computer Engineering, 2020, Rutgers University
URL: https://rucore.libraries.rutgers.edu/rutgers-lib/62961/
► Trauma activity recognition aims to detect, recognize, and predict the activities (or tasks) during a trauma resuscitation. Previous work has mainly focused on using various…
(more)
▼ Trauma activity recognition aims to detect, recognize, and predict the activities (or tasks) during a trauma resuscitation. Previous work has mainly focused on using various sensor data including image, RFID, and vital signals to generate the trauma event log. However, spoken language and environmental sound, which contain rich communication and contextual information necessary for trauma team cooperation, is still largely ignored. In this paper, we propose a multimodal attention network (MAN) that uses both verbal transcripts and environmental audio stream as input; the model extracts textual and acoustic features using a multi-level multi-head attention module, and forms a final shared representation for trauma activity classification. We evaluated the proposed architecture on 75 actual trauma resuscitation cases collected from a hospital. We achieved 72.4% accuracy with 0.705 F1 score, demonstrating that our proposed architecture is useful and efficient. These results also show that using spoken language and environmental audio indeed helps identify hard-to-recognize activities, compared to previous approaches. We also provide a detailed analysis of the performance and generalization of the proposed multimodal attention network.
Advisors/Committee Members: Marsic, Ivan (chair), Gajic, Zoran (internal member), Chen, Yingying (internal member), School of Graduate Studies.
Subjects/Keywords: Medical informatics; Resuscitation
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APA (6th Edition):
Zhang, Ruiyu, 1. (2020). Multimodal attention network for trauma activity recognition from spoken language and environmental sound. (Masters Thesis). Rutgers University. Retrieved from https://rucore.libraries.rutgers.edu/rutgers-lib/62961/
Chicago Manual of Style (16th Edition):
Zhang, Ruiyu, 1996-. “Multimodal attention network for trauma activity recognition from spoken language and environmental sound.” 2020. Masters Thesis, Rutgers University. Accessed January 18, 2021.
https://rucore.libraries.rutgers.edu/rutgers-lib/62961/.
MLA Handbook (7th Edition):
Zhang, Ruiyu, 1996-. “Multimodal attention network for trauma activity recognition from spoken language and environmental sound.” 2020. Web. 18 Jan 2021.
Vancouver:
Zhang, Ruiyu 1. Multimodal attention network for trauma activity recognition from spoken language and environmental sound. [Internet] [Masters thesis]. Rutgers University; 2020. [cited 2021 Jan 18].
Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/62961/.
Council of Science Editors:
Zhang, Ruiyu 1. Multimodal attention network for trauma activity recognition from spoken language and environmental sound. [Masters Thesis]. Rutgers University; 2020. Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/62961/
Rutgers University
24.
Norton, Corey Benjamin, 1996-.
Magnetic phagocyte biosensing framework for point-of-care sepsis diagnostics and monitoring.
Degree: MS, Biosensor, 2020, Rutgers University
URL: https://rucore.libraries.rutgers.edu/rutgers-lib/64186/
► Sepsis, a potentially deadly immunoresponse to infection, is a major concern in hospitals in the United States. Current laboratory processes used to diagnose and monitor…
(more)
▼ Sepsis, a potentially deadly immunoresponse to infection, is a major concern in hospitals in the United States. Current laboratory processes used to diagnose and monitor sepsis are costly, time-consuming, or only provide a small piece of information about the complex condition. In order to develop specific individualized treatments for septic patients that do not heavily depend on the use of broad-spectrum antibiotics, a clinician must be provided with both pathogen information about the underlying infection and patient immunoresponse information. While there has been considerable progress towards biosensor designs that can provide pathogen information, there is still a significant demand for designs that can provide immunoresponse information.
The design of a novel biosensing framework has been proposed for gathering information about a patient’s phagocytes, critical components of the innate immune system that protect the body from infection. The design is composed of electrical, microfluidic, and magnetic subsystems that work together to produce a distinct electrical signature signifying the presence of functional phagocytes in a human blood sample. The device has been simulated, fabricated, and experimentally tested using 17 blood samples collected from patients suspected of bacterial infections. Furthermore, two pattern recognition neural networks were developed to analyze and classify the experimental data. One network detects the presence of functional phagocytes in a biological sample with 88.2% accuracy, and the other network diagnoses sepsis with 88.2% accuracy by analyzing these functional phagocytes. This novel framework presents the potential to reduce the mortality rate of sepsis by allowing for earlier diagnosis and treatment.
Advisors/Committee Members: Hassan, Umer (chair), Gajic, Zoran (internal member), Wu, Chung-Tse (internal member), School of Graduate Studies.
Subjects/Keywords: Septicemia – Diagnosis; Electrical and Computer Engineering
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APA (6th Edition):
Norton, Corey Benjamin, 1. (2020). Magnetic phagocyte biosensing framework for point-of-care sepsis diagnostics and monitoring. (Masters Thesis). Rutgers University. Retrieved from https://rucore.libraries.rutgers.edu/rutgers-lib/64186/
Chicago Manual of Style (16th Edition):
Norton, Corey Benjamin, 1996-. “Magnetic phagocyte biosensing framework for point-of-care sepsis diagnostics and monitoring.” 2020. Masters Thesis, Rutgers University. Accessed January 18, 2021.
https://rucore.libraries.rutgers.edu/rutgers-lib/64186/.
MLA Handbook (7th Edition):
Norton, Corey Benjamin, 1996-. “Magnetic phagocyte biosensing framework for point-of-care sepsis diagnostics and monitoring.” 2020. Web. 18 Jan 2021.
Vancouver:
Norton, Corey Benjamin 1. Magnetic phagocyte biosensing framework for point-of-care sepsis diagnostics and monitoring. [Internet] [Masters thesis]. Rutgers University; 2020. [cited 2021 Jan 18].
Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/64186/.
Council of Science Editors:
Norton, Corey Benjamin 1. Magnetic phagocyte biosensing framework for point-of-care sepsis diagnostics and monitoring. [Masters Thesis]. Rutgers University; 2020. Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/64186/
Rutgers University
25.
Balasubramanian, Vivekanandan, 1991-.
Towards frameworks for large scale ensemble-based execution patterns.
Degree: MS, Electrical and Computer Engineering, 2015, Rutgers University
URL: https://rucore.libraries.rutgers.edu/rutgers-lib/47253/
► Towards Frameworks for Large Scale Ensemble-based Execution Patterns by Vivekanandan Balasubramanian Thesis Director: Dr. Shantenu Jha A major challenge in the field of chemical sciences…
(more)
▼ Towards Frameworks for Large Scale Ensemble-based Execution Patterns by Vivekanandan Balasubramanian Thesis Director: Dr. Shantenu Jha A major challenge in the field of chemical sciences is to bridge the gap between the ability to study matter at an atomic scale and to predict how these details behave and impact at a macroscopic scale. Molecular Dynamics (MD) simulations are a powerful tool for the study of macromolecular systems as they provide the ability to compute thermodynamic and kinetic parameters accurately. In order for MD simulations to be effective, they must adequately sample, e.g., effi- ciently and accurately sample all conformational space for a molecule. A long standing debate in the MD community has been around approaches to effective sampling: for a given amount of compute time, which is likely to guarantee better sampling: a single long-running simulation or multiple smaller simulations? In this project, we provide support for the scenario when multiple small simulations are to be used. Another important requirement faced by MD community is the need for iterative simulation and analysis stages, from which data can be extracted and, based on prob- ability densities and weights, new set of trajectories can be generated. These scenarios result in the following computational challenges: (i) Executing large number of tasks concurrently, (ii) Support for heterogeneous resource, (iii) Effective data movement that is correlated with stage transitions. iiTo address these requirements, we developed the Ensemble MD Toolkit (EnMDTK). The EnMDTK has three primary design features: (1) Fundamental support for multiple concurrent simulations, (2) Support for different ensemble-based execution patterns, and (3) Execution Plugins which abstract, from the user the challenges /difficulties of managing the execution of these patterns on heterogeneous systems. The toolkit enables scientists to easily and scalably develop their own applications using pre-determined patterns supported by the EnMDTK. Our contribution to this project is the development, testing and documentation of the specific iterative Simulation-Analysis pattern of EnMDTK. The development re- quired extensive study and testing of the underlying RADICAL-Pilot framework in order to use it in the most effective form. Knowledge of the individual kernels, work- ing and their specific dependencies were required for their deployment on the various resources. Testing revealed certain optimizations that could be done with the data movement. Performance characterization of the final toolkit was also done.
Advisors/Committee Members: Jha, Shantenu (chair), Javanmard, Mehdi (internal member), Gajic, Zoran (internal member), York, Darrin M (outside member).
Subjects/Keywords: Molecular dynamics – Computer simulation; Macromolecular Systems
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APA (6th Edition):
Balasubramanian, Vivekanandan, 1. (2015). Towards frameworks for large scale ensemble-based execution patterns. (Masters Thesis). Rutgers University. Retrieved from https://rucore.libraries.rutgers.edu/rutgers-lib/47253/
Chicago Manual of Style (16th Edition):
Balasubramanian, Vivekanandan, 1991-. “Towards frameworks for large scale ensemble-based execution patterns.” 2015. Masters Thesis, Rutgers University. Accessed January 18, 2021.
https://rucore.libraries.rutgers.edu/rutgers-lib/47253/.
MLA Handbook (7th Edition):
Balasubramanian, Vivekanandan, 1991-. “Towards frameworks for large scale ensemble-based execution patterns.” 2015. Web. 18 Jan 2021.
Vancouver:
Balasubramanian, Vivekanandan 1. Towards frameworks for large scale ensemble-based execution patterns. [Internet] [Masters thesis]. Rutgers University; 2015. [cited 2021 Jan 18].
Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/47253/.
Council of Science Editors:
Balasubramanian, Vivekanandan 1. Towards frameworks for large scale ensemble-based execution patterns. [Masters Thesis]. Rutgers University; 2015. Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/47253/
Rutgers University
26.
Škatarić, Maja, 1986-.
Scale invariance in biological systems.
Degree: PhD, Electrical and Computer Engineering, 2014, Rutgers University
URL: https://rucore.libraries.rutgers.edu/rutgers-lib/45463/
► In this dissertation we will discuss various techniques related to modeling and identification problems arising in complex biological networks, and demonstrate how control theory approaches…
(more)
▼ In this dissertation we will discuss various techniques related to modeling and identification problems arising in complex biological networks, and demonstrate how control theory approaches can be used to validate mathematical models coming from exhaustive computational experiments or noisy experimental data. The methodology based on systematic exploration of the basic dynamic processes, feedback control loops, and signal processing mechanisms in complex networks or their parts provides powerful tools for guiding the reverse-engineering of networks, and allows one to design artificial systems that are capable of achieving various objectives. Adaptation is an essential property of many cellular systems and it means that the measured variables return to their basal levels after a transient response to a step increase in stimulus. By definition, neither the concepts of perfect nor approximate adaptation address the characteristics of the transient signaling which occurs prior to a return to steady state, which are physiologically relevant. It has been recently observed that some adapting systems, ranging from bacterial chemotaxis pathways to signal transduction mechanisms in eukaryotes exhibit an additional feature: scale invariance, meaning that transient behavior remains approximately the same when the background signal level is scaled. Recent interest in scale-invariance was triggered by a pair of papers published in 2009, in which scale-invariant behavior was experimentally observed in several highly conserved eukaryotic signaling pathways that play roles in embryonic patterning, stem cell homeostasis, cell division, and other central processes, and their misregulation results in diseases including several types of cancer. In this thesis we will review the biological phenomena of adaptation and scale invariance, and present the relevant mathematical results for several classes of systems that exhibit these properties. We will use a model from the literature which describes the class of enzyme networks, to prove the impossibility of perfect scale invariance, and develop the mechanism which gives rise to an approximate scale invariance. We will demonstrate results on a biological example of soil-living amoeba Dictyostelium discoideum. Additionally, it has been often remarked in the literature that certain systems whose output variables respond at a faster time scale than internal components, give rise to an approximate scale-invariant behavior. We will state a fundamental limitation of such a mechanism, showing that there is a minimal error that cannot be overcome, no matter how large the separation of time scales is. We will highlight the extensions and challenges in analyzing adaptation and scale-invariance in a stochastic setting. Finally, we will discuss the development of tools for the identification of time-varying parameters in nonhomogeneous Poisson processes, in applications where discrete measurements such as "spikes" or "tumbles" are observed from the behavior of free swimming…
Advisors/Committee Members: Sontag, Eduardo (chair), Gajic, Zoran (internal member), Daut, David (internal member), Orfanidis, Sophocles (internal member), Baykal-Gursoy, Melike (outside member).
Subjects/Keywords: Scaling laws (Statistical physics); Control theory; Biological models
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APA (6th Edition):
Škatarić, Maja, 1. (2014). Scale invariance in biological systems. (Doctoral Dissertation). Rutgers University. Retrieved from https://rucore.libraries.rutgers.edu/rutgers-lib/45463/
Chicago Manual of Style (16th Edition):
Škatarić, Maja, 1986-. “Scale invariance in biological systems.” 2014. Doctoral Dissertation, Rutgers University. Accessed January 18, 2021.
https://rucore.libraries.rutgers.edu/rutgers-lib/45463/.
MLA Handbook (7th Edition):
Škatarić, Maja, 1986-. “Scale invariance in biological systems.” 2014. Web. 18 Jan 2021.
Vancouver:
Škatarić, Maja 1. Scale invariance in biological systems. [Internet] [Doctoral dissertation]. Rutgers University; 2014. [cited 2021 Jan 18].
Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/45463/.
Council of Science Editors:
Škatarić, Maja 1. Scale invariance in biological systems. [Doctoral Dissertation]. Rutgers University; 2014. Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/45463/
Rutgers University
27.
McGarvey, John Joseph, 1960-.
Reduced order modeling, time scale analysis, and simulation of power electronic systems.
Degree: PhD, Electrical and Computer Engineering, 2016, Rutgers University
URL: https://rucore.libraries.rutgers.edu/rutgers-lib/50048/
► Switch mode operation has long been employed in power electronic systems due to the need for high efficiency. In recent years, this mode of operation…
(more)
▼ Switch mode operation has long been employed in power electronic systems due to the need for high efficiency. In recent years, this mode of operation has also been exploited in signal processing applications such as switched capacitor filters and switched capacitor radio frequency (RF) power amplifiers. While these systems have advantages in terms of weight, efficiency, and heat dissapation they are inherently highly nonlinear. This makes accurate analysis both challenging and computationally intensive. State-space based analysis is a powerful mathematical technique often employed for control system design, analysis, and implementation. These modeling tools are now gaining attention for the analysis of switch mode systems. This dissertation investigates the feasibility of applying a number of these techniques, including system balancing, time scale analysis, model order reduction, and working with the general solution to the state-space form to these nonlinear systems, for the purposes of design analysis, system minimization, and simulation. Two basic but dissimilar switched mode power converters are analyzed by employing a number techniques. The first of these systems is a common boost converter and the second is a Class E power converter that employs the technique of zero voltage switching in order to improve both efficiency and radiated RF emissions. In addition to the state-space based modeling techniques each power converter is also simulated using commercially available SPICE simulation tools. Finally, a rudimentary Class E power converter is constructed and tested in order to check the validity of these mathematical models.
Advisors/Committee Members: Gajic, Zoran (chair), Caggiano, Michael F (internal member), Najafizadeh, Laleh (internal member), Reyes, Pavel Ivanoff (outside member).
Subjects/Keywords: Computer simulation; Electric power systems – Simulation
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APA (6th Edition):
McGarvey, John Joseph, 1. (2016). Reduced order modeling, time scale analysis, and simulation of power electronic systems. (Doctoral Dissertation). Rutgers University. Retrieved from https://rucore.libraries.rutgers.edu/rutgers-lib/50048/
Chicago Manual of Style (16th Edition):
McGarvey, John Joseph, 1960-. “Reduced order modeling, time scale analysis, and simulation of power electronic systems.” 2016. Doctoral Dissertation, Rutgers University. Accessed January 18, 2021.
https://rucore.libraries.rutgers.edu/rutgers-lib/50048/.
MLA Handbook (7th Edition):
McGarvey, John Joseph, 1960-. “Reduced order modeling, time scale analysis, and simulation of power electronic systems.” 2016. Web. 18 Jan 2021.
Vancouver:
McGarvey, John Joseph 1. Reduced order modeling, time scale analysis, and simulation of power electronic systems. [Internet] [Doctoral dissertation]. Rutgers University; 2016. [cited 2021 Jan 18].
Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/50048/.
Council of Science Editors:
McGarvey, John Joseph 1. Reduced order modeling, time scale analysis, and simulation of power electronic systems. [Doctoral Dissertation]. Rutgers University; 2016. Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/50048/
Rutgers University
28.
Ge, Yao, 1983-.
Wavelet-based software-defined radio receiver design.
Degree: PhD, Electrical and Computer Engineering, 2016, Rutgers University
URL: https://rucore.libraries.rutgers.edu/rutgers-lib/51294/
► Software-defined radios (SDRs), have become very important in both commercial as well as military applications that demand high Quality of Service (QoS) in hostile physical…
(more)
▼ Software-defined radios (SDRs), have become very important in both commercial as well as military applications that demand high Quality of Service (QoS) in hostile physical and spectral conditions. Simultaneously, interoperability with legacy communications equipment is also a critical requirement for widespread adoption. An ideal SDR supports multi-standard, multimode and multiband wireless communications. Such a system is reconfigurable in the sense that transmitted signals at different carrier frequencies and/or different modulation schemes can be reliably identified and appropriately demodulated in real-time. In this dissertation, such a radio system is developed using a wavelet transform-based transceiver platform, composed of four main wavelet-domain processors: Channel Estimator, Channel Equalizer, Automatic Modulation Recognition (AMR) and Demodulator. The AMR method is blind identification of the modulation scheme used to format digital data embedded in a signal. It is investigated using the Discrete Wavelet Transform (DWT) in conjunction with techniques typically used in signal processing field of pattern recognition. In particular, the concept of wavelet-domain template matching is used to achieve modulation identification prior to signal demodulation. The digital modulation schemes considered in this work include families of ASK, FSK, PSK and QAM. The test signals used in this study have been subjected to Additive White Gaussian Noise (AWGN) resulting in Signal-to-Noise Ratios (SNRs) in the range of -5 dB to 10 dB. Monte Carlo simulations using the wavelet-based AMR algorithms show correct classification rates that are better than most of existing methods that use other techniques For wavelet-based demodulation original signal information can be directly obtained in the wavelet-domain without an inverse transform of a signal to its original time-domain form, and that has been proven analytically herein. Extensive Monte Carlo simulations have shown that the Bit Error Rates (BERs) obtained from wavelet-based demodulation are very comparable with the optimal case of matched filter-based demodulation. The results of this work show the ability of wavelet transforms to enable the automatic recognition and subsequent demodulation of communications signals in a single processing sequence by solely using the computationally-friendly mathematics of the Discrete Wavelet Transform.
Advisors/Committee Members: Gajic, Zoran (chair), Daut, David G. (co-chair), Jha, Shantenu (internal member), Marsic, Ivan (internal member), Vaz, Canute (outside member).
Subjects/Keywords: Digital communications; Software radio
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APA ·
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MLA ·
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APA (6th Edition):
Ge, Yao, 1. (2016). Wavelet-based software-defined radio receiver design. (Doctoral Dissertation). Rutgers University. Retrieved from https://rucore.libraries.rutgers.edu/rutgers-lib/51294/
Chicago Manual of Style (16th Edition):
Ge, Yao, 1983-. “Wavelet-based software-defined radio receiver design.” 2016. Doctoral Dissertation, Rutgers University. Accessed January 18, 2021.
https://rucore.libraries.rutgers.edu/rutgers-lib/51294/.
MLA Handbook (7th Edition):
Ge, Yao, 1983-. “Wavelet-based software-defined radio receiver design.” 2016. Web. 18 Jan 2021.
Vancouver:
Ge, Yao 1. Wavelet-based software-defined radio receiver design. [Internet] [Doctoral dissertation]. Rutgers University; 2016. [cited 2021 Jan 18].
Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/51294/.
Council of Science Editors:
Ge, Yao 1. Wavelet-based software-defined radio receiver design. [Doctoral Dissertation]. Rutgers University; 2016. Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/51294/
Rutgers University
29.
Kodra, Kliti.
New control methods for multi-time-scale linear systems with smart grid applications.
Degree: PhD, Electrical and Computer Engineering, 2017, Rutgers University
URL: https://rucore.libraries.rutgers.edu/rutgers-lib/53649/
► Power systems within smart grid architectures are generally large scale and have a tendency to exhibit multiple time-scales when modeled in their entirety due to…
(more)
▼ Power systems within smart grid architectures are generally large scale and have a tendency to exhibit multiple time-scales when modeled in their entirety due to the presence of physical components of different nature and parasitic parameters associated with them. Research in current literature primarily focuses on studying power system architectures based on a two time-scale decomposition. In this dissertation, we use singular perturbation theory to investigate time-scale decomposition and related anomalies and propose new control methods by considering the presence of multiple time-scales. We start with an open-loop study of a simplified model of an islanded microgrid in singularly perturbed form with highly oscillatory and highly damped modes. Simulation results and analytical analysis conclude that the model does not contain any slow time-scales even though the eigenvalue distribution of the model tells otherwise. While the singular perturbation parameter is very small, the classical two time-scale decomposition in this case is not effective. On the other hand, the modes corresponding to the fastest time-scales provide a very accurate approximation of the original model. The results obtained via singular perturbation methods are also corroborated by using the balancing realization technique. Namely, only the states corresponding to the fastest modes are dominant. Motivated by the structure of the state-space input matrix of the previous problem, we consider a new class of singularly perturbed systems where individual inputs control slow and fast modes independently. We study the linear quadratic regulator optimal control problem for three cases that are common in real physical systems, namely when the inputs are completely decoupled or independent, when weak coupling is present between the inputs, and when the fast subsystem is weakly controlled. We obtain the zero-order approximation solution of the continuous algebraic Riccati equations for each case in terms of simplified sub-problems which avoid possible ill-conditioning. As a follow-up, parallel recursive algorithms based on fixed-point methods are proposed to improve the error of the approximations leading to the accurate solution of Riccati equations and the cost functional in a few iterations of the algorithm. These results are further extended to the stochastic case. The linear-quadratic Gaussian control problem is investigated and its solution is also obtained very accurately in an iterative fashion. Lastly, implicit singularly perturbed systems with multiple time-scales are considered. The Schur decomposition is utilized to transform the control matrix into an upper quasi-triangular form where the time-scales are explicitly ordered and a singularly perturbed model is obtained after perturbation parameters are evaluated and extracted. The standard multi-time-scale system is then decoupled into individual time-scales by sequentially applying an invariant transformation. Multi-time-scale control of the Schur-decomposed system is then considered.…
Advisors/Committee Members: Gajic, Zoran (chair), Godrich, Hana (internal member), Pompili, Dario (internal member), Yi, Jingang (internal member), Zhong, Ningfan (outside member).
Subjects/Keywords: Smart power grids
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APA (6th Edition):
Kodra, K. (2017). New control methods for multi-time-scale linear systems with smart grid applications. (Doctoral Dissertation). Rutgers University. Retrieved from https://rucore.libraries.rutgers.edu/rutgers-lib/53649/
Chicago Manual of Style (16th Edition):
Kodra, Kliti. “New control methods for multi-time-scale linear systems with smart grid applications.” 2017. Doctoral Dissertation, Rutgers University. Accessed January 18, 2021.
https://rucore.libraries.rutgers.edu/rutgers-lib/53649/.
MLA Handbook (7th Edition):
Kodra, Kliti. “New control methods for multi-time-scale linear systems with smart grid applications.” 2017. Web. 18 Jan 2021.
Vancouver:
Kodra K. New control methods for multi-time-scale linear systems with smart grid applications. [Internet] [Doctoral dissertation]. Rutgers University; 2017. [cited 2021 Jan 18].
Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/53649/.
Council of Science Editors:
Kodra K. New control methods for multi-time-scale linear systems with smart grid applications. [Doctoral Dissertation]. Rutgers University; 2017. Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/53649/
Rutgers University
30.
Sehajpal, Sumati, 1981-.
Design and analysis of class E RF power amplifiers.
Degree: PhD, Electrical and Computer Engineering, 2017, Rutgers University
URL: https://rucore.libraries.rutgers.edu/rutgers-lib/53982/
► The most important stage in a wireless transmitter is the power amplifier because this stage consumes a great deal of power in a wireless system…
(more)
▼ The most important stage in a wireless transmitter is the power amplifier because this stage consumes a great deal of power in a wireless system and is a major factor in the battery life of portable equipment. Generally, switching RF power amplifiers have greater efficiency than their linear counterparts but they are also more difficult to analyze, have switching losses, and can introduce switching transients into the amplified signal. The research focus for this dissertation is on the Class E switching RF power amplifier. This circuit topology uses soft switching in order to minimize switching transients and achieve nearly 100% efficiency in the ideal case. In this dissertation, a short range wireless power transfer system, based on a Class E power converter, is investigated. It operates at 200 kHz and was constructed using commonly available components. A mathematical analysis of a Class E RF power amplifier, operating at 3.9 MHz, is then presented. The model is based on modern state-space techniques and is simulated using both MATLAB and Simulink. Class E RF power amplifiers are insensitive to signal amplitude variations so by itself, this system is only suitable for the amplification of constant envelope signals. This limitation can be overcome, however, with the addition of a supply modulator. One of the most efficient supply modulators is the Class G dual supply modulator. This device utilizes two supply voltages and automatically switches between them depending on signal amplitude. The process of switching from one supply voltage to the other produces transients or ”glitches” that introduce undesirable broadband noise into the signal output. The effects of these glitches, on the noise floor at the Class E power amplifier output, are investigated using a detailed simulation model run on MATLAB. A typical input data stream, glitch depth, and glitch duration are applied to this operating model. As a potential design aid, a purely hypothetical Class E amplifier state-space based model is analyzed based on same simplifying assumptions including a truncated Taylor series expansion of the matrix exponential. Two algebraic equations were derived to determine two Class E amplifier design components. Class E systems are often designed using Raab’s formulas which were derived based on a number of simplifying assumptions. Furthermore, electronic components have tolerances. As a consequence of this a Class E amplifier or power converter must be tuned for proper operation. In order to simplify this process a detailed sensitivity analysis of the Class E circuit topology is presented. This investigation is approached from multiple directions including a state-space based model simulated using MATLAB, a SPICE based simulation, and an experimental Class E prototype operating at 100 kHz.
Advisors/Committee Members: Gajic, Zoran (chair), Caggiano, Michael (internal member), Orfanidis, Sophocles (internal member), Zou, Qingze (internal member), McGarvey, John Joseph (outside member).
Subjects/Keywords: Power amplifiers
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
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Manager
APA (6th Edition):
Sehajpal, Sumati, 1. (2017). Design and analysis of class E RF power amplifiers. (Doctoral Dissertation). Rutgers University. Retrieved from https://rucore.libraries.rutgers.edu/rutgers-lib/53982/
Chicago Manual of Style (16th Edition):
Sehajpal, Sumati, 1981-. “Design and analysis of class E RF power amplifiers.” 2017. Doctoral Dissertation, Rutgers University. Accessed January 18, 2021.
https://rucore.libraries.rutgers.edu/rutgers-lib/53982/.
MLA Handbook (7th Edition):
Sehajpal, Sumati, 1981-. “Design and analysis of class E RF power amplifiers.” 2017. Web. 18 Jan 2021.
Vancouver:
Sehajpal, Sumati 1. Design and analysis of class E RF power amplifiers. [Internet] [Doctoral dissertation]. Rutgers University; 2017. [cited 2021 Jan 18].
Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/53982/.
Council of Science Editors:
Sehajpal, Sumati 1. Design and analysis of class E RF power amplifiers. [Doctoral Dissertation]. Rutgers University; 2017. Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/53982/
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