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Rutgers University
1.
Yaman, Yavuz Orhan, 1986-.
Intra-cluster channel modeling and cross-layer beamforming efficiency for mmWave communications.
Degree: PhD, Electrical and Computer Engineering, 2020, Rutgers University
URL: https://rucore.libraries.rutgers.edu/rutgers-lib/62959/ 
► In millimeter-wave (mmWave) channels, to overcome the high path loss, beamforming is required. Since beamforming is technically a spatial filtering operation, the spatial representation of…
(more)
▼ In millimeter-wave (mmWave) channels, to overcome the high path loss, beamforming is required. Since beamforming is technically a spatial filtering operation, the spatial representation of the channel is essential. Specifically, for accurate beam alignment and minimizing the outages, inter-beam interferences, etc., cluster-level spatial modeling is necessary. Further, to balance and optimize the hardware complexity at the receiver front-end and the received power, a detailed analysis for the beamforming efficiency at PHY layer is required. In the first part of this study, we first create a ray-tracing based intra-cluster channel model (RT-ICM) for stationary mmWave communications and then using RT-ICM, in the second part, we inquire the optimum beamwidth values that maximizes the received power in the case of both perfect and imperfect alignments. Using the theoretical array antenna gain models for uniform linear array (ULA) and uniform planar array (UPA), we estimate the required number of antennas for the optimum beamwidth; thereby analyzing the cost at the receiver structure and study the trade-off curves for the reasonable optimum hardware complexity. We also show how to realize an adaptive beamwidth structure by means of phase-only beam broadening approach and then implement it into an hybrid beamforming system. In the simulations, we first show that the proposed intra-cluster model, RT-ICM is in a perfect agreement with the full-scan software results and the measurements held in the literature. For the beamwidth analysis, we demonstrate that the optimum beamwidth is a function of standard deviation of the channel power spectrum and the amount of misalignment. For a perfect alignment, we also show that the optimum beamwidth is zero, but to reach 95% of the maximum power for an indoor mmWave cluster, a practical beamwidth of 7◦ − 10◦ is enough, which can be created with 18 − 20 antenna elements for ULA. It is concluded that the antenna gain dominates the received power in the UPA case and intra-cluster power angular spectrum of the channel becomes less critical. Finally, in the third part, we propose two fast beam searching protocols that work at MAC layer to complete the beamforming efficiency analysis at mmWave communications.
Advisors/Committee Members: Spasojevic, Predrag (chair), School of Graduate Studies.
Subjects/Keywords: 5G; Millimeter wave communication systems
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APA (6th Edition):
Yaman, Yavuz Orhan, 1. (2020). Intra-cluster channel modeling and cross-layer beamforming efficiency for mmWave communications. (Doctoral Dissertation). Rutgers University. Retrieved from https://rucore.libraries.rutgers.edu/rutgers-lib/62959/
Chicago Manual of Style (16th Edition):
Yaman, Yavuz Orhan, 1986-. “Intra-cluster channel modeling and cross-layer beamforming efficiency for mmWave communications.” 2020. Doctoral Dissertation, Rutgers University. Accessed January 18, 2021.
https://rucore.libraries.rutgers.edu/rutgers-lib/62959/.
MLA Handbook (7th Edition):
Yaman, Yavuz Orhan, 1986-. “Intra-cluster channel modeling and cross-layer beamforming efficiency for mmWave communications.” 2020. Web. 18 Jan 2021.
Vancouver:
Yaman, Yavuz Orhan 1. Intra-cluster channel modeling and cross-layer beamforming efficiency for mmWave communications. [Internet] [Doctoral dissertation]. Rutgers University; 2020. [cited 2021 Jan 18].
Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/62959/.
Council of Science Editors:
Yaman, Yavuz Orhan 1. Intra-cluster channel modeling and cross-layer beamforming efficiency for mmWave communications. [Doctoral Dissertation]. Rutgers University; 2020. Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/62959/
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.
Škatarić, Maja, 1986-.
Fold change detection in 3-node enzymatic networks.
Degree: MS, Electrical and Computer Engineering, 2011, Rutgers University
URL: http://hdl.rutgers.edu/1782.1/rucore10001600001.ETD.000061515
► Complex networks are studied across many fields of science. To discover design principles that underlie these networks, network motifs are introduced, as sub-graphs of interconnections…
(more)
▼ Complex networks are studied across many fields of science. To discover design principles that underlie these networks, network motifs are introduced, as sub-graphs of interconnections occurring in complex networks much more often than expected at random. A distinct set of network motifs were identified in many types of biological networks, such as gene transcriptional networks, neuronal networks, and enzymatic networks, but only small fraction of them have been well described. By connecting recurrent motifs with a particular cellular function, it is hoped that one can understand the dynamics of the entire network based on the dynamics of its core motifs. Two biologically important functions were introduced and motivated through examples from biology, namely, exact adaptation, which represents a system's ability to respond to a change in the input signal and return to its pre-stimulated state even when the change in input persists, and Fold Change Detection, which is a special property of adapting systems, where the output is invariant under the scaling of inputs. In this thesis, the study of network motifs was used as a motivation to further explore the dynamics of all 3-node enzymatic networks capable of achieving Fold Change Detection property. A search through 16,038 topologies sampled with 10,000 parameters each, led to the conclusion that despite the diversity of enzymatic circuits, only small number of them is capable of achieving the FCD property, and the mechanism for achieving it can be understood through a theoretical and computational analysis.
Advisors/Committee Members: Sontag, Eduardo (chair), Orfanidis, Sophocles (internal member), Spasojevic, Predrag (internal member).
Subjects/Keywords: Multienzyme complexes
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APA (6th Edition):
Škatarić, Maja, 1. (2011). Fold change detection in 3-node enzymatic networks. (Masters Thesis). Rutgers University. Retrieved from http://hdl.rutgers.edu/1782.1/rucore10001600001.ETD.000061515
Chicago Manual of Style (16th Edition):
Škatarić, Maja, 1986-. “Fold change detection in 3-node enzymatic networks.” 2011. Masters Thesis, Rutgers University. Accessed January 18, 2021.
http://hdl.rutgers.edu/1782.1/rucore10001600001.ETD.000061515.
MLA Handbook (7th Edition):
Škatarić, Maja, 1986-. “Fold change detection in 3-node enzymatic networks.” 2011. Web. 18 Jan 2021.
Vancouver:
Škatarić, Maja 1. Fold change detection in 3-node enzymatic networks. [Internet] [Masters thesis]. Rutgers University; 2011. [cited 2021 Jan 18].
Available from: http://hdl.rutgers.edu/1782.1/rucore10001600001.ETD.000061515.
Council of Science Editors:
Škatarić, Maja 1. Fold change detection in 3-node enzymatic networks. [Masters Thesis]. Rutgers University; 2011. Available from: http://hdl.rutgers.edu/1782.1/rucore10001600001.ETD.000061515
Rutgers University
4.
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
5.
Chigirev, Ilya.
A 26 microwatt, two-stage VCO and mixer for direct DPSK conversion in MedRadio.
Degree: MS, Electrical and Computer Engineering, 2013, Rutgers University
URL: https://rucore.libraries.rutgers.edu/rutgers-lib/41741/
► This thesis proposes a design for a low-power downconverter and demodulator, formed by a voltage controlled oscillator and mixer to create a Vance demodulator. This…
(more)
▼ This thesis proposes a design for a low-power downconverter and demodulator, formed by a voltage controlled oscillator and mixer to create a Vance demodulator. This system is intended to operate in the MedRadio frequency band (401-406 MHz). The MedRadio band is intended by the FCC for ultra low-power radios used for medical applications to carry non-voice data. A combination of gm/ID design methods and MATLAB scripting have been used to efficiently calculate the size of transistors within the VCO circuit. Using the transconductance and bias current ratio (gm/ID) value as a primary design variable efficient operation is ensured with this a geometry independent process. The MATLAB script, combined with simulated device information, allows for automation of device sizing, increasing accuracy of results over conventional square-law hand-calculations. The result of this work and design method is a 26 microwatt direct down-conversion DPSK demodulator in the MedRadio, designed in an 8RF CMOS process. The circuit utilizes a two-stage VCO design directly coupled to a passive ring mixer. With biasing circuits it requires an active die area of 49 um x 39 um. The circuit is designed to operate from a 1 V supply and achieves a post-extracted simulated phase noise of -118 dBc/Hz when injection locked. The passive mixer has been designed to achieve a conversion gain of -18.4 dB.
Advisors/Committee Members: Spasojevic, Predrag (chair), Najafizadeh, Laleh (internal member), Caggiano, Michael (internal member), Walling, Jeffery Sean (outside member).
Subjects/Keywords: Voltage-controlled oscillators; Low power radio
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APA (6th Edition):
Chigirev, I. (2013). A 26 microwatt, two-stage VCO and mixer for direct DPSK conversion in MedRadio. (Masters Thesis). Rutgers University. Retrieved from https://rucore.libraries.rutgers.edu/rutgers-lib/41741/
Chicago Manual of Style (16th Edition):
Chigirev, Ilya. “A 26 microwatt, two-stage VCO and mixer for direct DPSK conversion in MedRadio.” 2013. Masters Thesis, Rutgers University. Accessed January 18, 2021.
https://rucore.libraries.rutgers.edu/rutgers-lib/41741/.
MLA Handbook (7th Edition):
Chigirev, Ilya. “A 26 microwatt, two-stage VCO and mixer for direct DPSK conversion in MedRadio.” 2013. Web. 18 Jan 2021.
Vancouver:
Chigirev I. A 26 microwatt, two-stage VCO and mixer for direct DPSK conversion in MedRadio. [Internet] [Masters thesis]. Rutgers University; 2013. [cited 2021 Jan 18].
Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/41741/.
Council of Science Editors:
Chigirev I. A 26 microwatt, two-stage VCO and mixer for direct DPSK conversion in MedRadio. [Masters Thesis]. Rutgers University; 2013. Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/41741/
Rutgers University
6.
Ganapathi, Dinesh Prasanth.
Pilot based frameworks for weather research forecasting.
Degree: MS, Electrical and Computer Engineering, 2015, Rutgers University
URL: https://rucore.libraries.rutgers.edu/rutgers-lib/46342/
► The Weather Research Forecasting (WRF) domain consists of complex workflows that demand the use of Distributed Computing Infrastructure (DCI). Weather forecasting requires that weather researchers…
(more)
▼ The Weather Research Forecasting (WRF) domain consists of complex workflows that demand the use of Distributed Computing Infrastructure (DCI). Weather forecasting requires that weather researchers use different set of initial conditions and one or a combination of physics models on the same set of input data. For these type of simulations an ensemble based computing approach becomes imperative. Most DCIs have local job-schedulers that have no smart way of dealing with the execution of an ensemble type of computational problem as the job-schedulers are built to cater to the bare essentials of resource allocation. This means the weather scientists have to submit multiple jobs to the job-scheduler. In this dissertation we use Pilot-Job based tools to decouple work-load submission and resource allocation therefore streamlining the complex workflows in Weather Research and Forecasting domain and reduce their overall time to completion. We also achieve location independent job execution, data movement, placement and processing. Next, we create the necessary enablers to run an ensemble of tasks bearing the capability to run on multiple heterogeneous distributed computing resources there by creating the opportunity to minimize the overall time consumed in running the models. Our experiments show that the tools developed exhibit very good, strong and weak scaling characteristics. These results bear the potential to change the way weather researchers are submitting traditional WRF jobs to the DCIs by giving them a powerful weapon in their arsenal that can exploit the combined power of various heterogeneous DCIs that could otherwise be difficult to harness owing to interoperability issues.
Advisors/Committee Members: Jha, Shantenu (chair), Spasojevic, Predrag (internal member), Zonouz, Saman Aliari (internal member).
Subjects/Keywords: Weather forecasting; Cyberinfrastructure; Computer networks
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APA (6th Edition):
Ganapathi, D. P. (2015). Pilot based frameworks for weather research forecasting. (Masters Thesis). Rutgers University. Retrieved from https://rucore.libraries.rutgers.edu/rutgers-lib/46342/
Chicago Manual of Style (16th Edition):
Ganapathi, Dinesh Prasanth. “Pilot based frameworks for weather research forecasting.” 2015. Masters Thesis, Rutgers University. Accessed January 18, 2021.
https://rucore.libraries.rutgers.edu/rutgers-lib/46342/.
MLA Handbook (7th Edition):
Ganapathi, Dinesh Prasanth. “Pilot based frameworks for weather research forecasting.” 2015. Web. 18 Jan 2021.
Vancouver:
Ganapathi DP. Pilot based frameworks for weather research forecasting. [Internet] [Masters thesis]. Rutgers University; 2015. [cited 2021 Jan 18].
Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/46342/.
Council of Science Editors:
Ganapathi DP. Pilot based frameworks for weather research forecasting. [Masters Thesis]. Rutgers University; 2015. Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/46342/
Rutgers University
7.
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
8.
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
9.
Pinagapany, Srinivas, 1983-.
Decentralized spectrum allocation schemes for cognitive
radio networking.
Degree: MS, Electrical and Computer Engineering, 2011, Rutgers University
URL: http://hdl.rutgers.edu/1782.1/rucore10001600001.ETD.000061440
► This thesis presents simulation and an experimental investigation of a decentralized spectrum allocation algorithm for secondary user co-existence in a cognitive radio network. Conventional centralized…
(more)
▼ This thesis presents simulation and an experimental investigation of a decentralized spectrum allocation algorithm for secondary user co-existence in a cognitive radio network. Conventional centralized approaches use a Base Station (BS) or a centralized server with a global view of spectrum availability to carry out spectrum allocation. To keep this global view updated in real-time requires significant amount of signaling between the users and the BS, requiring additional spectrum. On the other hand, a decentralized spectrum allocation has the advantage of low-overhead for control information signaling and is typically more appropriate for ad-hoc network deployments. Various frameworks for decentralized resource allocation have already been proposed (Game theoretic framework, markov decision theoretic framework etc.). However, a full system implementation of any such technique has not been attempted. Inspired by the TCP congestion control mechanism, an Additive Increase Multiplicative Decrease (AIMD) based decentralized spectral allocation algorithm is proposed. It leads to a network-level fairness and efficient spectral usage in a cognitive radio network. A network consisting of only secondary users is considered for this problem and each secondary user uses a Non-Contiguous OFDM (NC-OFDM) transceiver system for data transmission. The GNU Radio-USRP2 cognitive radio platform is used for implementation purposes. This thesis also presents an experimental evaluation of an active interference suppression scheme used along with NC-OFDM to enhance the spectral quality of the transmitted waveform and, thereby, improving the overall spectral efficiency of the network. The RF transmission quality of the IA-PFT based NC-OFDM transmission using GNU Radio-USRP2 has been verified with reference to simulation results. Some system level throughput measurement results for Primary- Secondary Co-existence experiments are also discussed in the thesis. The functioning of the decentralized spectrum allocation algorithm has been validated using MATLAB simulations.
Advisors/Committee Members: Pinagapany, Srinivas, 1983- (author), Spasojevic, Predrag (chair), Raychaudhuri, Dipankar (co-chair), Trappe, Wade (internal member).
Subjects/Keywords: Cognitive radio networks; Spectrum analysis
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APA (6th Edition):
Pinagapany, Srinivas, 1. (2011). Decentralized spectrum allocation schemes for cognitive
radio networking. (Masters Thesis). Rutgers University. Retrieved from http://hdl.rutgers.edu/1782.1/rucore10001600001.ETD.000061440
Chicago Manual of Style (16th Edition):
Pinagapany, Srinivas, 1983-. “Decentralized spectrum allocation schemes for cognitive
radio networking.” 2011. Masters Thesis, Rutgers University. Accessed January 18, 2021.
http://hdl.rutgers.edu/1782.1/rucore10001600001.ETD.000061440.
MLA Handbook (7th Edition):
Pinagapany, Srinivas, 1983-. “Decentralized spectrum allocation schemes for cognitive
radio networking.” 2011. Web. 18 Jan 2021.
Vancouver:
Pinagapany, Srinivas 1. Decentralized spectrum allocation schemes for cognitive
radio networking. [Internet] [Masters thesis]. Rutgers University; 2011. [cited 2021 Jan 18].
Available from: http://hdl.rutgers.edu/1782.1/rucore10001600001.ETD.000061440.
Council of Science Editors:
Pinagapany, Srinivas 1. Decentralized spectrum allocation schemes for cognitive
radio networking. [Masters Thesis]. Rutgers University; 2011. Available from: http://hdl.rutgers.edu/1782.1/rucore10001600001.ETD.000061440
Rutgers University
10.
Sequeira, Samson, 1985-.
Energy based spectrum sensing for enabling dynamic spectrum access in cognitive radios.
Degree: MS, Electrical and Computer Engineering, 2011, Rutgers University
URL: http://hdl.rutgers.edu/1782.1/rucore10001600001.ETD.000061512
► Spectrum scarcity is increasingly becoming an obstacle for the implementation of new wireless technologies. On the contrary, recent studies have discovered considerable under-utilization of the…
(more)
▼ Spectrum scarcity is increasingly becoming an obstacle for the implementation of new wireless technologies. On the contrary, recent studies have discovered considerable under-utilization of the allocated spectrum by the licensed users. This suggests that the solution to the problem is a transition from static spectrum allocation policies to dynamic spectrum access methodologies. This can be accomplished through the use of Cognitive Radio technology. Cognitive Radio is considered as an intelligent radio which is capable of altering its transmission or reception parameters in accordance to the radio environment and the network state to use the available spectrum optimally. Significant research efforts have furthered Cognitive Radios since the idea was first conceived by Joseph Mitola in 1998. Cognitive Radio technology allows for the licensed spectrum of the primary users to be used on an opportunistic basis by unlicensed secondary users. A vital requirement of such an opportunistic scheme is that the licensed primary users be protected from detrimental interference from the secondary users while at the same time optimizing the performance for the secondary users. Thus the reliable detection of primary users offers better secondary system throughput via increased spectral efficiency in addition to safeguarding the primary system. Spectrum sensing is a technique used to detect the presence of primary users in the licensed spectrum. It is the estimation of the instantaneous occupancy of the frequency spectrum and is a key enabling factor for Cognitive Radios. Various techniques exist for performing spectrum sensing. In addition to primary user detection, spectrum sensing can also be employed for secondary detection and co-existence, interference analysis in multi-radio environments etc. In this thesis we study adaptive spectrum sensing based on energy detection with a purpose of demonstrating Dynamic Spectrum Access. The major focus has been to evaluate algorithms that can allow for estimation of noise in the presence of the signal which is essential for energy detection based schemes. We also present the system level implementation and evaluation of a Dynamic Spectrum Access setup developed using the USRP2/GNU Radio platform on the ORBIT Wireless Testbed at WINLAB as part of the WINLAB-NEC Collaborative Cognitive Radio Project.
Advisors/Committee Members: Sequeira, Samson, 1985- (author), Spasojevic, Predrag (chair), Raychaudhuri, Dipankar (internal member), Daut, David (internal member).
Subjects/Keywords: Cognitive radio networks; Spectrum analysis
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APA (6th Edition):
Sequeira, Samson, 1. (2011). Energy based spectrum sensing for enabling dynamic spectrum access in cognitive radios. (Masters Thesis). Rutgers University. Retrieved from http://hdl.rutgers.edu/1782.1/rucore10001600001.ETD.000061512
Chicago Manual of Style (16th Edition):
Sequeira, Samson, 1985-. “Energy based spectrum sensing for enabling dynamic spectrum access in cognitive radios.” 2011. Masters Thesis, Rutgers University. Accessed January 18, 2021.
http://hdl.rutgers.edu/1782.1/rucore10001600001.ETD.000061512.
MLA Handbook (7th Edition):
Sequeira, Samson, 1985-. “Energy based spectrum sensing for enabling dynamic spectrum access in cognitive radios.” 2011. Web. 18 Jan 2021.
Vancouver:
Sequeira, Samson 1. Energy based spectrum sensing for enabling dynamic spectrum access in cognitive radios. [Internet] [Masters thesis]. Rutgers University; 2011. [cited 2021 Jan 18].
Available from: http://hdl.rutgers.edu/1782.1/rucore10001600001.ETD.000061512.
Council of Science Editors:
Sequeira, Samson 1. Energy based spectrum sensing for enabling dynamic spectrum access in cognitive radios. [Masters Thesis]. Rutgers University; 2011. Available from: http://hdl.rutgers.edu/1782.1/rucore10001600001.ETD.000061512
Rutgers University
11.
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
12.
Venkataramanan, Guruguhanathan, 1987-.
Functional verification and programming model of WiNC2R for for 802.16e mobile WiMAX protocol.
Degree: MS, Electrical and Computer Engineering, 2011, Rutgers University
URL: http://hdl.rutgers.edu/1782.1/rucore10001600001.ETD.000063686
► The WiNLAB Network Centric Cognitive Radio (WiNC2R) is a task-based, programmable, multi-processor system-on-a-chip architecture for radio processing. It provides robust support for multiple wireless standards…
(more)
▼ The WiNLAB Network Centric Cognitive Radio (WiNC2R) is a task-based, programmable, multi-processor system-on-a-chip architecture for radio processing. It provides robust support for multiple wireless standards and excellent runtime flexibility using a ‘Virtual Flow Pipelining’ (VFP) mechanism. WiNC2R defines a cluster based architecture with a shared VFP controller, with specific functionalities for the VFP controller, to enable efficient processing of tasks in a given protocol flow. Given the stringent requirements of modern wireless protocols, it becomes critical to ensure that the WiNC2R implementation adheres to the design specifications. Implementing a transceiver design on WiNC2R for complex protocols requires a large number of processing engines. In this thesis, we have laid emphasis on architecture scalability, by addressing features like multi-clustering and next task processing. We have performed a detailed functional verification of the VFP controller using a SystemVerilog testbench, based on Open Verification Methodology (OVM) principles. We base the work by proposing a framework for using the WiNC2R platform for 802.16e Mobile WiMAX flows, by defining the specifications and performance requirements for each processor in the cluster. We have also provided sample programmable tasks for implementing WiMAX flows.
Advisors/Committee Members: Venkataramanan, Guruguhanathan, 1987- (author), Spasojevic, Predrag (chair), Miljanic, Zoran (internal member), Naganathan, Nagi (outside member).
Subjects/Keywords: IEEE 802.16 (Standard); Computer systems—Verification
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APA (6th Edition):
Venkataramanan, Guruguhanathan, 1. (2011). Functional verification and programming model of WiNC2R for for 802.16e mobile WiMAX protocol. (Masters Thesis). Rutgers University. Retrieved from http://hdl.rutgers.edu/1782.1/rucore10001600001.ETD.000063686
Chicago Manual of Style (16th Edition):
Venkataramanan, Guruguhanathan, 1987-. “Functional verification and programming model of WiNC2R for for 802.16e mobile WiMAX protocol.” 2011. Masters Thesis, Rutgers University. Accessed January 18, 2021.
http://hdl.rutgers.edu/1782.1/rucore10001600001.ETD.000063686.
MLA Handbook (7th Edition):
Venkataramanan, Guruguhanathan, 1987-. “Functional verification and programming model of WiNC2R for for 802.16e mobile WiMAX protocol.” 2011. Web. 18 Jan 2021.
Vancouver:
Venkataramanan, Guruguhanathan 1. Functional verification and programming model of WiNC2R for for 802.16e mobile WiMAX protocol. [Internet] [Masters thesis]. Rutgers University; 2011. [cited 2021 Jan 18].
Available from: http://hdl.rutgers.edu/1782.1/rucore10001600001.ETD.000063686.
Council of Science Editors:
Venkataramanan, Guruguhanathan 1. Functional verification and programming model of WiNC2R for for 802.16e mobile WiMAX protocol. [Masters Thesis]. Rutgers University; 2011. Available from: http://hdl.rutgers.edu/1782.1/rucore10001600001.ETD.000063686
Rutgers University
13.
Li, Weitian, 1996-.
Defending visual adversarial examples with smoothout regularization.
Degree: MS, Electrical and Computer Engineering, 2019, Rutgers University
URL: https://rucore.libraries.rutgers.edu/rutgers-lib/61796/
► In the past decades with unexpected and rapid development of computer vision, tremendous computer vision applications like face recognition, image recognition, object detection and so…
(more)
▼ In the past decades with unexpected and rapid development of computer vision, tremendous computer vision applications like face recognition, image recognition, object detection and so on. They present their powerful abilities to made life so convenient for humans. In the trend of computer vision, deep neural networks (DNNs) occupies a very essential role. Because relative applications are deploying in many critical fields such as autonomous car, authentication and so on. However, there exist many adversarial attacks that can result in huge model performance degradation. Deploying a robust and reliable DNN is becoming a crucial and necessary step for various applications. In this work, we introduce SmoothBlock, a novel regularization method to improve the model robustness against adversarial attacks. It can be directly utilized as a defense mechanism in inference phase to protect the pre-trained model. Besides, the proposed SmoothBlock can also be applied in both training and adversarial training to further improve the robustness against various adversarial attacks. Furthermore, we apply the proposed SmoothBlock with a self-ensemble method to improve the robustness of the system. We conduct extensive trials and detailed analysis on CIFAR-10 using Resnet20 model. Results show that the model robustness can be significantly improved by our method against FGSM, PGD and C&W L2 attacks under white-box scenarios.
Advisors/Committee Members: Yuan, Bo (chair), Wei, Sheng (internal member), Spasojevic, Predrag (internal member), School of Graduate Studies.
Subjects/Keywords: Adversarial example; Neural networks (Computer science) – Security measures
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APA (6th Edition):
Li, Weitian, 1. (2019). Defending visual adversarial examples with smoothout regularization. (Masters Thesis). Rutgers University. Retrieved from https://rucore.libraries.rutgers.edu/rutgers-lib/61796/
Chicago Manual of Style (16th Edition):
Li, Weitian, 1996-. “Defending visual adversarial examples with smoothout regularization.” 2019. Masters Thesis, Rutgers University. Accessed January 18, 2021.
https://rucore.libraries.rutgers.edu/rutgers-lib/61796/.
MLA Handbook (7th Edition):
Li, Weitian, 1996-. “Defending visual adversarial examples with smoothout regularization.” 2019. Web. 18 Jan 2021.
Vancouver:
Li, Weitian 1. Defending visual adversarial examples with smoothout regularization. [Internet] [Masters thesis]. Rutgers University; 2019. [cited 2021 Jan 18].
Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/61796/.
Council of Science Editors:
Li, Weitian 1. Defending visual adversarial examples with smoothout regularization. [Masters Thesis]. Rutgers University; 2019. Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/61796/
Rutgers University
14.
Hlyvko, Andrii, 1993-.
Performance comparison of stereo and RGB sensors for UAV collision avoidance.
Degree: MS, Drone aircraft – Collision avoidance systems, 2020, Rutgers University
URL: https://rucore.libraries.rutgers.edu/rutgers-lib/64183/
► Over the past years there have been many different approaches that have shown significant progress towards solving the challenging problem of collision avoidance for UAVs.…
(more)
▼ Over the past years there have been many different approaches that have shown significant progress towards solving the challenging problem of collision avoidance for UAVs. These approaches range from SLAM to machine learning. Machine learning approaches are promising because the model learns to perform a complex task using training data instead of someone having to develop a complex and task-specific controller. In machine learning approaches we can choose whether to train in simulation or on real data. Collecting real-world UAV collision data is very time consuming and can result in a damaged UAV. On the other hand, synthetic data and real-world data come from different distributions so training using synthetic data introduces a gap between the learned distribution and the actual one, which can result in poor performance. Even though this distribution gap exists, training in simulation saves time and cost of training, making these approaches the focus of this study. Usually due to UAV size and weight constrains we can only choose one sensor for performing obstacle avoidance. Therefore, we need to select a sensor that would give the best performance when a model is trained in simulation. Many different sensors can be chosen for performing UAV collision avoidance, such as RGB, stereo, LIDAR, among others. Even if a sensor can be accurately simulated, the data it produces might not contain sufficient information for performing collision avoidance well. For instance, a sonar can be very accurately simulated but it does not contain sufficient information about the state of the environment required to avoid complex shapes. The hypothesis is that a model that is trained entirely in simulation is going to perform differently in the real-world depending on what simulated sensor was used for training. In this thesis we train using different simulated sensors to demonstrate the hypothesis that real-world performance with a model trained entirely in simulation improves when an appropriate sensor is chosen for training. Even though we cannot confirm that one sensor outperforms others for every single machine learning approach, we obtain experimental data for a few methods to support our claim. RGB cameras are one of the simplest and most widely used sensors for drone sense and avoid. On the other hand, stereo sensors are bulky and require high computing power to produce real-time results useful for collision avoidance in drones. This has changed with recent advances in stereo sensors and computing, which has made it possible to use them in micro-aerial vehicles for real-time operation [1]. Therefore, these two sensors are the most suitable for our study. In this thesis we compare how much performance do we gain, if any, by training on a simulated stereo system instead of a simulated RGB camera for obstacle avoidance using machine learning approaches.
Advisors/Committee Members: Diez, F. Javier (chair), Bajwa, Waheed (internal member), Spasojevic, Predrag (internal member), School of Graduate Studies.
Subjects/Keywords: Electrical and Computer Engineering
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APA (6th Edition):
Hlyvko, Andrii, 1. (2020). Performance comparison of stereo and RGB sensors for UAV collision avoidance. (Masters Thesis). Rutgers University. Retrieved from https://rucore.libraries.rutgers.edu/rutgers-lib/64183/
Chicago Manual of Style (16th Edition):
Hlyvko, Andrii, 1993-. “Performance comparison of stereo and RGB sensors for UAV collision avoidance.” 2020. Masters Thesis, Rutgers University. Accessed January 18, 2021.
https://rucore.libraries.rutgers.edu/rutgers-lib/64183/.
MLA Handbook (7th Edition):
Hlyvko, Andrii, 1993-. “Performance comparison of stereo and RGB sensors for UAV collision avoidance.” 2020. Web. 18 Jan 2021.
Vancouver:
Hlyvko, Andrii 1. Performance comparison of stereo and RGB sensors for UAV collision avoidance. [Internet] [Masters thesis]. Rutgers University; 2020. [cited 2021 Jan 18].
Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/64183/.
Council of Science Editors:
Hlyvko, Andrii 1. Performance comparison of stereo and RGB sensors for UAV collision avoidance. [Masters Thesis]. Rutgers University; 2020. Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/64183/
Rutgers University
15.
Ramani, Vishakha, 1993-.
"I-MAC": an ICN based radio access network architecture.
Degree: MS, Information centric networking, 2020, Rutgers University
URL: https://rucore.libraries.rutgers.edu/rutgers-lib/64188/
► The rapidly increasing connectivity demands of both fixed and mobile devices on the internet have motivated a clean-slate redesign of existing core and radio access…
(more)
▼ The rapidly increasing connectivity demands of both fixed and mobile devices on the internet have motivated a clean-slate redesign of existing core and radio access networks. The advent of content-oriented applications such as social media applications, on-demand video streaming services, interactive gaming applications, etc. has exposed the limitations in the existing host-centric Internet Protocol (IP) based internet architecture. Information-Centric Networking, a clean-slate future internet architecture, has been extensively researched to show its effectiveness in its handling of content-centric applications in the core-network. This thesis aims to propose ICN based radio access network architecture, "I-MAC", which enables the integration of ICN identifiers and semantics with radio access network in order to achieve efficiency gains in capacity-limited wireless networks which are used by an increasing proportion of Internet traffic. Additionally, the use of a Local Name Resolution Table (LNRS), maintained by each base station in LTE, called as Evolved Node B (eNodeB), to seamlessly map the device GUID (globally unique identifier) with the corresponding radio network identifier allocated during each attach process is also suggested. This design is further extended to specifically support push and pull-based multicast transmissions at the last hop by a novel control signaling which incorporates physical control and data channels of existing cellular architecture. The verification of this design is done via a special pull-based multicast use case which takes into account the characteristics of highway-tunnel topography, traffic conditions, and user behavior. Through extensive simulations using NS-3 coupled with SUMO (Simulation for Urban MObility), it is shown that significant multicast gain is achieved at the eNodeB and considerable amount of bandwidth is saved. The simulation results of this design show that the temporal correlation among many delay tolerant user requests induces about 45% aggregation of user requests, costing the user a delay of merely a second. The results also show the suitability of this design for massive IoT applications where the device uptime is reduced by a factor of twenty from the current cellular multicast architecture, SC-PTM, thus providing considerable device power savings. Analytical measurements show spectral efficiency of this work with a control data occupancy in data channel of 0.07% in contrast with that of SC-PTM which has 1.32%, thereby, ensuring that user data gets a significant share of the bandwidth. In addition, parametric evaluations to check the sensitivity of the design to various parameters introduced in the model have also been performed.
Advisors/Committee Members: Raychaudhuri, Dipankar (chair), Yates, Roy (internal member), Spasojevic, Predrag (internal member), School of Graduate Studies.
Subjects/Keywords: Electrical and Computer Engineering
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APA (6th Edition):
Ramani, Vishakha, 1. (2020). "I-MAC": an ICN based radio access network architecture. (Masters Thesis). Rutgers University. Retrieved from https://rucore.libraries.rutgers.edu/rutgers-lib/64188/
Chicago Manual of Style (16th Edition):
Ramani, Vishakha, 1993-. “"I-MAC": an ICN based radio access network architecture.” 2020. Masters Thesis, Rutgers University. Accessed January 18, 2021.
https://rucore.libraries.rutgers.edu/rutgers-lib/64188/.
MLA Handbook (7th Edition):
Ramani, Vishakha, 1993-. “"I-MAC": an ICN based radio access network architecture.” 2020. Web. 18 Jan 2021.
Vancouver:
Ramani, Vishakha 1. "I-MAC": an ICN based radio access network architecture. [Internet] [Masters thesis]. Rutgers University; 2020. [cited 2021 Jan 18].
Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/64188/.
Council of Science Editors:
Ramani, Vishakha 1. "I-MAC": an ICN based radio access network architecture. [Masters Thesis]. Rutgers University; 2020. Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/64188/
Rutgers University
16.
Sugrim, Shridatt, 1978-.
A strategy for classifying a set of dissimilar channels by
their a priori channel occupancy probability.
Degree: MS, Electrical and Computer Engineering, 2014, Rutgers University
URL: https://rucore.libraries.rutgers.edu/rutgers-lib/42459/
► Recent Changes in policy regarding the opportunistic use of licensed radio spectrum have paved the way for new innovative technologies like cognitive radio (CR). In…
(more)
▼ Recent Changes in policy regarding the opportunistic use of licensed radio spectrum have paved the way for new innovative technologies like cognitive radio (CR). In CR systems a secondary user (SU) is allowed to use open channels if the primary user (PU) is not currently using them. Regulatory bodies like the FCC establish maximum interference requirements for SUs when making use of these channels. To comply with these requirements SUs must measure the occupancy of each of the channels they intend to use. Any strategy employed for opportunistic spectrum usage has to consider the tradeoffs between time spent searching for empty channels and time spent using those empty channels. In most cases the spectrum sensing that is employed by a CR system starts with no prior information about the occupancy of the channels it intends to use. We propose a novel method of addressing this lack of prior knowledge by employing an efficient strategy that classifies some of the channels the SU intends to use within a fixed time limit. This classifier can be run before the SUs attempt transmission, and will provide the SUs' spectrum sensing sub-systems with a set of occupancy probabilities for some of the channels. Our classifier will be designed around sequential probability ratio tests (SPRT) because these tests maintain bounds on classification errors while using the smallest number of samples for classification. The classifier will attempt to classify as many channels as possible within the given time limit by intelligently allocating channel measurements. We will examine the system's performance in various measurement resource regimes and identify regimes where our approach is superior to simpler classification schemes.
Advisors/Committee Members: Spasojevic, Predrag (chair), Lindqvist, Janne (internal member), Daut, David (internal member), Gundy, Richard (outside member), Baykal-Gursoy, Melike (outside member).
Subjects/Keywords: Cognitive radio networks; Radio lines
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APA ·
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Manager
APA (6th Edition):
Sugrim, Shridatt, 1. (2014). A strategy for classifying a set of dissimilar channels by
their a priori channel occupancy probability. (Masters Thesis). Rutgers University. Retrieved from https://rucore.libraries.rutgers.edu/rutgers-lib/42459/
Chicago Manual of Style (16th Edition):
Sugrim, Shridatt, 1978-. “A strategy for classifying a set of dissimilar channels by
their a priori channel occupancy probability.” 2014. Masters Thesis, Rutgers University. Accessed January 18, 2021.
https://rucore.libraries.rutgers.edu/rutgers-lib/42459/.
MLA Handbook (7th Edition):
Sugrim, Shridatt, 1978-. “A strategy for classifying a set of dissimilar channels by
their a priori channel occupancy probability.” 2014. Web. 18 Jan 2021.
Vancouver:
Sugrim, Shridatt 1. A strategy for classifying a set of dissimilar channels by
their a priori channel occupancy probability. [Internet] [Masters thesis]. Rutgers University; 2014. [cited 2021 Jan 18].
Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/42459/.
Council of Science Editors:
Sugrim, Shridatt 1. A strategy for classifying a set of dissimilar channels by
their a priori channel occupancy probability. [Masters Thesis]. Rutgers University; 2014. Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/42459/
Rutgers University
17.
Mahdavi-Doost, Hajar, 1980-.
Energy-aware reliable communication.
Degree: PhD, Electrical and Computer Engineering, 2016, Rutgers University
URL: https://rucore.libraries.rutgers.edu/rutgers-lib/50039/
► Emerging applications of short-range communication such as the Internet of Things and body area networks highlight the importance of processing energy, as compared to transmit…
(more)
▼ Emerging applications of short-range communication such as the Internet of Things and body area networks highlight the importance of processing energy, as compared to transmit energy. In this thesis, we investigate fundamental limits of reliable communication when receiver processing is powered by random energy sources and subject to constraints on energy storage. We propose a receiver model that captures the trade-off between sampling energy and decoding energy. The model relies on the decoding energy being a decreasing function of the capacity gap between the code rate and the channel capacity. The receiver can save energy in sampling by dropping a fraction of samples, at the cost of reducing the effective capacity and thus increasing the energy needed for decoding. While sampling and decoding energies are typically comparable, the key issue is that the sampling is a real-time process; the samples must be collected during the transmission time of that packet. Thus the energy harvesting rate and battery size may constrain the sampling rate. This model allows us to characterize the maximum throughput of a basic communication channel with limited processing energy. This is done based on striking the balance between the sampling and decoding energy, subject to limited random arrival of energy, and limited battery size. We further extend this result to multi-user scenarios, where multiple transmitters communicate with a single receiver with limited energy. We introduce the concept of receive multi-user diversity, in which the receiver decodes the messages experiencing the strongest channels in order to reduce the decoding energy per user. Next, we propose using hybrid automatic retransmission request (HARQ) with soft combining to reduce the processing energy and improve the throughput under limited receiver energy. In this protocol, the receiver keeps requesting additional redundancy in order to increase the capacity gap, which in turn reduces the processing energy. We compare the performance of incremental redundancy (IR) HARQ, and Repetition-HARQ. In these systems, the decoding energy is a decreasing function of the capacity gap but an increasing function of the code-length. The IR-HARQ protocol yields a better capacity gap, but increases the code-length, while Repetition-HARQ offers less improvement in the capacity gap, but does not increase the effective code-length. Thus, contrary to systems without receiver energy constraints in which IR-HARQ always performs better, here, depending on the system parameters, Repetition-HARQ can outperform IR-HARQ. Finally, we study energy efficiency and energy harvesting in LTE networks. We formulate a single-cell downlink scheduling problem that enforces constraints on the selection of transmission parameters. Linear cost constraints on the set of channels are also imposed in order to accommodate energy efficiency considerations. We show that the resulting problem is NP-hard and we propose a deterministic multiplicative- update algorithm for which we establish…
Advisors/Committee Members: Yates, Roy D. (chair), Mandayam, Narayan (internal member), Soljanin, Emina (internal member), Spasojevic, Predrag (internal member), Prasad, Narayan (outside member).
Subjects/Keywords: Energy harvesting
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APA (6th Edition):
Mahdavi-Doost, Hajar, 1. (2016). Energy-aware reliable communication. (Doctoral Dissertation). Rutgers University. Retrieved from https://rucore.libraries.rutgers.edu/rutgers-lib/50039/
Chicago Manual of Style (16th Edition):
Mahdavi-Doost, Hajar, 1980-. “Energy-aware reliable communication.” 2016. Doctoral Dissertation, Rutgers University. Accessed January 18, 2021.
https://rucore.libraries.rutgers.edu/rutgers-lib/50039/.
MLA Handbook (7th Edition):
Mahdavi-Doost, Hajar, 1980-. “Energy-aware reliable communication.” 2016. Web. 18 Jan 2021.
Vancouver:
Mahdavi-Doost, Hajar 1. Energy-aware reliable communication. [Internet] [Doctoral dissertation]. Rutgers University; 2016. [cited 2021 Jan 18].
Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/50039/.
Council of Science Editors:
Mahdavi-Doost, Hajar 1. Energy-aware reliable communication. [Doctoral Dissertation]. Rutgers University; 2016. Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/50039/
Rutgers University
18.
Zhong, Jing, 1991-.
Age of information for real-time network applications.
Degree: PhD, Age of information, 2019, Rutgers University
URL: https://rucore.libraries.rutgers.edu/rutgers-lib/62094/
► Driven by recent advances in ubiquitous connectivity and pervasive computing, real-time status updates to interested recipients have become increasingly popular in streaming applications. These status…
(more)
▼ Driven by recent advances in ubiquitous connectivity and pervasive computing, real-time status updates to interested recipients have become increasingly popular in streaming applications. These status updating systems all share a common need: the recipients want their information about the sources to be as fresh as possible. This thesis aims to analyze a recently proposed information freshness/timeliness metric, age of information (AoI), in various real-time network applications, and optimize the corresponding AoI metric given the network constraints.
In this thesis, we model the real-time status updating system as source-receiver pairs connected through the networks. The first fundamental problem we consider is how timely update messages should be compressed based on the given network capacity. Different from traditional data compression techniques that shorten the average codeword length, we show that the optimal lossless compression scheme for fast message delivery depends on higher moments of the codeword length due to the queueing delay. The AoI-optimal codebook can be constructed by a recursive search algorithm based on the convex AoI penalty function.
In ultra-dense network deployments, real-time updates are expected to be distributed to massive numbers of receivers via the nearby storage nodes at the network edge. Thus, the second fundamental problem we address is how the real-time updates should be replicated and distributed to multiple edge storage nodes through multicast networks. We answer the question by evaluating the average AoI at a receiver which has access to a random number of edge storage nodes, given the distribution of the random network delay. This system model is also applicable to time-sensitive content updates in Dynamo-type distributed storage systems in which the write and read operations go to multiple storage nodes simultaneously. We derive the AoI-optimal quorum mechanism that balances the data consistency and operation latency.
Beyond the study of the two fundamental problems in AoI, we extend the similar AoI analysis to applications with resource contention and scheduling. We examine a remote cache updating system in which the local server maintains snapshots of the content at different remote sources and updates those snapshots according to a constrained rate. We compare AoI to an alternative Age of Synchronization freshness metric and evaluate the optimal rate allocation scheme for the two different age metrics. We also examine the edge cloud computational offloading system with multiple users, and investigate the scheduling policy for incoming jobs in a vision processing application at an edge server. We show that a greedy scheduling policy is optimal for a class of AoI-related penalty functions.
Advisors/Committee Members: Yates, Roy D (chair), Soljanin, Emina (co-chair), Spasojevic, Predrag (internal member), El Rouayheb, Salim (internal member), Ji, Bo (outside member), School of Graduate Studies.
Subjects/Keywords: Electrical and Computer Engineering
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APA (6th Edition):
Zhong, Jing, 1. (2019). Age of information for real-time network applications. (Doctoral Dissertation). Rutgers University. Retrieved from https://rucore.libraries.rutgers.edu/rutgers-lib/62094/
Chicago Manual of Style (16th Edition):
Zhong, Jing, 1991-. “Age of information for real-time network applications.” 2019. Doctoral Dissertation, Rutgers University. Accessed January 18, 2021.
https://rucore.libraries.rutgers.edu/rutgers-lib/62094/.
MLA Handbook (7th Edition):
Zhong, Jing, 1991-. “Age of information for real-time network applications.” 2019. Web. 18 Jan 2021.
Vancouver:
Zhong, Jing 1. Age of information for real-time network applications. [Internet] [Doctoral dissertation]. Rutgers University; 2019. [cited 2021 Jan 18].
Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/62094/.
Council of Science Editors:
Zhong, Jing 1. Age of information for real-time network applications. [Doctoral Dissertation]. Rutgers University; 2019. Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/62094/
Rutgers University
19.
Bitar, Rawad, 1990-.
Codes for private distributed computation with applications to machine learning.
Degree: PhD, Electrical and Computer Engineering, 2020, Rutgers University
URL: https://rucore.libraries.rutgers.edu/rutgers-lib/62921/
► We consider the problem of private distributed computation. Our main interest in this problem stems from machine learning applications. A master node (referred to as…
(more)
▼ We consider the problem of private distributed computation. Our main interest in this problem stems from machine learning applications. A master node (referred to as master) possesses a tremendous amount of {em confidential} data (e.g., personal, genomic or medical data) and wants to perform intensive computations on it. The master divides these computations into smaller computational tasks and distribute them to {em untrusted} workers that perform these tasks in parallel. The workers return their results to the master, who processes them to obtain its original task. In large scale systems, the appearance of slow and unresponsive workers, called stragglers, is inevitable. Stragglers incur large delays on the computation if they are not accounted for. Our goal is to construct codes that maintain the privacy of the data and allow flexible straggler mitigation, ie tolerate the presence of a varying number of stragglers.
We propose the use of communication efficient secret sharing (CE-SS) in private {em linear} coded computation with straggler mitigation. A CE-SS scheme satisfies the properties of threshold secret sharing. Moreover, it allows the master to reconstruct the secret by reading and communicating the minimum amount of information from a variable number of workers, up to a given threshold. We introduce three explicit constructions of CE-SS codes called {em Staircase codes}. The first construction achieves optimal communication and read costs for a given number of workers d. The second construction achieves optimal costs universally for all possible values of d between k and n. The third construction, which is the most general, achieves optimal costs universally for all values of d in any given set Δ subseteq {k,dots,n}.
We analyze the performance of Staircase codes in distributed computation systems where the workers have fixed resources. We model the workers service time by iid shifted exponential random variables. We derive upper and lower bounds on the Master's mean waiting time. We derive the distribution of the Master's waiting time, and its mean, for systems with up to two stragglers. We show that Staircase codes always outperform existing solutions based on classical secret sharing codes. We validate our results with extensive implementation on Amazon EC2.
We consider the case where the workers have time-varying resources. We develop a private and rateless adaptive coded computation (PRAC) algorithm for distributed matrix-vector multiplication. PRAC is based on the use of Fountain codes coupled with MDS codes to maintain privacy and to adaptively assign tasks to the workers. The assigned tasks are proportional to the estimated resources at the workers. We provide theoretical guarantees on the performance of PRAC and compare it to baselines. Moreover, we validate our theoretical results through simulations and implementation on Android devices.
We go beyond linear coded computation and tackle the problem of distributed gradient descent for general convex loss functions in the presence…
Advisors/Committee Members: El Rouayheb, Salim (chair), Soljanin, Emina (internal member), Spasojevic, Predrag (internal member), Yates, Roy (internal member), Wachter-Zeh, Antonia (outside member), School of Graduate Studies.
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APA (6th Edition):
Bitar, Rawad, 1. (2020). Codes for private distributed computation with applications to machine learning. (Doctoral Dissertation). Rutgers University. Retrieved from https://rucore.libraries.rutgers.edu/rutgers-lib/62921/
Chicago Manual of Style (16th Edition):
Bitar, Rawad, 1990-. “Codes for private distributed computation with applications to machine learning.” 2020. Doctoral Dissertation, Rutgers University. Accessed January 18, 2021.
https://rucore.libraries.rutgers.edu/rutgers-lib/62921/.
MLA Handbook (7th Edition):
Bitar, Rawad, 1990-. “Codes for private distributed computation with applications to machine learning.” 2020. Web. 18 Jan 2021.
Vancouver:
Bitar, Rawad 1. Codes for private distributed computation with applications to machine learning. [Internet] [Doctoral dissertation]. Rutgers University; 2020. [cited 2021 Jan 18].
Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/62921/.
Council of Science Editors:
Bitar, Rawad 1. Codes for private distributed computation with applications to machine learning. [Doctoral Dissertation]. Rutgers University; 2020. Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/62921/
20.
Raina, Manik.
Properties of LDGM-LDPC codes with applications to secrecy coding.
Degree: MS, Electrical and Computer Engineering, 2010, Rutgers University
URL: http://hdl.rutgers.edu/1782.2/rucore10001600001.ETD.000053153
► The ensemble of low-density generator-matrix/low-density parity-check (LDGM-LDPC) codes has been proposed in literature. In this thesis, an irregular LDGM-LDPC code is studied as a sub-code…
(more)
▼ The ensemble of low-density generator-matrix/low-density parity-check (LDGM-LDPC) codes has been proposed in literature. In this thesis, an irregular LDGM-LDPC code is studied as a sub-code of an LDPC code with some randomly emph{punctured} output-bits. It is shown that the LDGM-LDPC codes achieve rates arbitrarily close to the channel-capacity of the binary-input symmetric-output memoryless (BISOM) channel with a finite lower-bound on the emph{complexity}. The measure of complexity is the average-degree (per information-bit) of the check-nodes for the factor-graph of the code. A lower-bound on the average degree of the check-nodes of the irregular LDGM-LDPC codes is obtained. The bound does not depend on the decoder used at the receiver. The stability condition for decoding the irregular LDGM-LDPC codes over the binary-erasure channel (BEC) under iterative-decoding with message-passing is described. The LDGM-LDPC codes are capacity achieving with bounded complexity and possess natural binning/nesting structure. These codes are applied to secrecy coding. The problem of secrecy coding for the type-II binary symmetric memoryless wiretap channel is studied. In this model, the main channel is binary-input and noiseless and the eavesdropper channel is binary-symmetric memoryless. A coding strategy based on emph{secure nested codes} is proposed. A capacity achieving length-n code for the eavesdropper channel bins the space {0,1}
n into co-sets which are used for secret messaging. The resulting co-set scheme achieves secrecy capacity of the type-II binary symmetric memoryless channel. As an example, the ensemble of capacity-achieving regular low-density generator-matrix/low-density parity-check (LDGM-LDPC) codes is studied as a basis for binning. The previous result is generalized to the case of a noisy main-channel. The problem of secrecy-coding for a specific type-I wiretap channel is studied. In the type-I wiretap channel under consideration, the main channel is a binary-input symmetric-output memoryless (BISOM) channel and the eavesdropper channel is a binary-symmetric channel (BSC). A secure-nested-code that achieves perfect-secrecy for the above type-I channel is proposed. The secure-nested-code is based on a nested regular LDGM-LDPC code construction.
Advisors/Committee Members: Raina, Manik (author), Spasojevic, Predrag (chair), Yates, Roy (internal member), Trappe, Wade (internal member).
Subjects/Keywords: Information theory; Coding theory
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APA (6th Edition):
Raina, M. (2010). Properties of LDGM-LDPC codes with applications to secrecy coding. (Masters Thesis). Rutgers University. Retrieved from http://hdl.rutgers.edu/1782.2/rucore10001600001.ETD.000053153
Chicago Manual of Style (16th Edition):
Raina, Manik. “Properties of LDGM-LDPC codes with applications to secrecy coding.” 2010. Masters Thesis, Rutgers University. Accessed January 18, 2021.
http://hdl.rutgers.edu/1782.2/rucore10001600001.ETD.000053153.
MLA Handbook (7th Edition):
Raina, Manik. “Properties of LDGM-LDPC codes with applications to secrecy coding.” 2010. Web. 18 Jan 2021.
Vancouver:
Raina M. Properties of LDGM-LDPC codes with applications to secrecy coding. [Internet] [Masters thesis]. Rutgers University; 2010. [cited 2021 Jan 18].
Available from: http://hdl.rutgers.edu/1782.2/rucore10001600001.ETD.000053153.
Council of Science Editors:
Raina M. Properties of LDGM-LDPC codes with applications to secrecy coding. [Masters Thesis]. Rutgers University; 2010. Available from: http://hdl.rutgers.edu/1782.2/rucore10001600001.ETD.000053153
21.
Chueng, Sy-Min.
The study of CMOS based VCO with active inductor and its design methodology.
Degree: MS, Electrical and Computer Engineering, 2012, Rutgers University
URL: http://hdl.rutgers.edu/1782.1/rucore10001600001.ETD.000066652
► Active Inductors are useful in reducing the large chip area typically consumed by spiral inductors, as well as providing larger inductance values and higher quality…
(more)
▼ Active Inductors are useful in reducing the large chip area typically consumed by spiral inductors, as well as providing larger inductance values and higher quality factors that otherwise cannot be achieved by spiral inductors. Integrated inductors find application in many radio frequency (RF) front end integrated circuits, including impedance matching, filtering, biasing and in oscillator circuits. Nonetheless, because of the interdependent relationship of the self-resonant frequency and quality factor it is often difficult to meet desired circuit requirements. Additionally, active devices pose problems of higher power consumption , noise figure and potential instability. This thesis begins with the study of active inductors, the Wu active inductor in particular, and considers tuning methods based on the Wu active inductor topology. Starting with the small-signal model, the emulated inductance and quality factor expressions are derived. Next, the operation of active inductors under large-signal is closely examined. Comparisons between a passive and an active VCO are made. The active inductor based voltage-controlled oscillator (Active VCO) is studied extensively, and the methods of improving the performance under large signal-behavior are discussed. Then a design procedure based on gm/ID methodology is proposed. A Matlab script that can be applied to gyrator-C based active inductors is developed to determine the sizing of the transistors for a desired inductance and resonant frequency. Cadence Virtuoso is used for simulations, and extraction based on an IBM 8RF technology file. Finally, a low power active VCO is designed, simulated and laid out.
Advisors/Committee Members: Chueng, Sy-Min (author), Walling, Jeffery (chair), Jiang, Wei (internal member), Spasojevic, Predrag (internal member).
Subjects/Keywords: Electric inductors; Integrated passive components
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APA (6th Edition):
Chueng, S. (2012). The study of CMOS based VCO with active inductor and its design methodology. (Masters Thesis). Rutgers University. Retrieved from http://hdl.rutgers.edu/1782.1/rucore10001600001.ETD.000066652
Chicago Manual of Style (16th Edition):
Chueng, Sy-Min. “The study of CMOS based VCO with active inductor and its design methodology.” 2012. Masters Thesis, Rutgers University. Accessed January 18, 2021.
http://hdl.rutgers.edu/1782.1/rucore10001600001.ETD.000066652.
MLA Handbook (7th Edition):
Chueng, Sy-Min. “The study of CMOS based VCO with active inductor and its design methodology.” 2012. Web. 18 Jan 2021.
Vancouver:
Chueng S. The study of CMOS based VCO with active inductor and its design methodology. [Internet] [Masters thesis]. Rutgers University; 2012. [cited 2021 Jan 18].
Available from: http://hdl.rutgers.edu/1782.1/rucore10001600001.ETD.000066652.
Council of Science Editors:
Chueng S. The study of CMOS based VCO with active inductor and its design methodology. [Masters Thesis]. Rutgers University; 2012. Available from: http://hdl.rutgers.edu/1782.1/rucore10001600001.ETD.000066652
22.
Borota, Dušan, 1978-.
Cooperative and multi-channel energy-based sensing in the vehicular environment: on the minimum time to sense.
Degree: MS, Electrical and Computer Engineering, 2012, Rutgers University
URL: http://hdl.rutgers.edu/1782.1/rucore10001600001.ETD.000064047
► Vehicular networking has significant potential to enable diverse range of applications, including safety and convenience. As the number of vehicles and applications using wireless spectrum…
(more)
▼ Vehicular networking has significant potential to enable diverse range of applications, including safety and convenience. As the number of vehicles and applications using wireless spectrum grow, one can expect to see a shortage of either spatially or temporally available spectrum. In this thesis, we advocate that dynamic spectrum access for vehicles be the first step towards solving the spectrum shortage. For this, vehicles must be able to sense the availability of spectrum before attempting to transmit. The existence of other transmitters should be detected in order not to cause or experience interference. However, spectrum sensing in vehicular environments is a challenging task due to mobility, shadowing and other factors that govern vehicular environments. Therefore, spectrum sensing by a single vehicle may not be able to provide accurate information about the spectrum vacancies. Cooperative spectrum sensing, on the other hand, uses spatial diversity and can be employed to overcome the limitations associated with a single sensor/vehicle. Moreover, spectrum sensing in vehicular environments is challenged by mobility of sensors and reflectors causing significant variations in received signal power. Signal power variations over time were not included in sensing system models dealing with wide spectrum sensing. In the first part of this thesis we investigate cooperative spectrum sensing performance in a vehicular environment for sensing signals transmitted from i) a roadside infrastructure and ii) radios located on other vehicles, by using energy-based detection of a transmitted pilot tone as an example. Our goal is to characterize the limits on detection speed and reliability of simple hard and soft cooperative energy-based schemes for this environment. We show how cooperation reduces sensing time by a factor of five in an AWGN channel. The cooperative sensing time reduction is far more significant in a vehicular environment with fading and shadowing. Finally, we illustrate how infrastructure-to-vehicle scenario favors soft equal gain combining while vehicle-to-vehicle scenario favors hard fusion OR rule. In the second part of this thesis we propose a sensing system model for wide band spectrum sensing that encompasses signal power variations over time. Then we propose to use Maximum Likelihood (ML) channel occupancy detection to determine spectrum sub-band activity vector. We are using adjacent lane traffic channel model with set of parameters validated in Winlab experiments, and focus on determining sensing time needed to achieve certain sensing performance. We focus on NTSC TV spectrum and show how using energy-based ML channel occupancy detector of three adjacent NTSC channels, with transmit power of 1kW, at 10km distance from transmitter, with power variance higher than 3dB, sensing time of 1msec is sufficient to obtain PMISS = 0.01 for range of speeds from 20 to 140km/h. Moreover, since we use ML which minimizes overall probability of error when all activity vectors are equally…
Advisors/Committee Members: Borota, Dušan, 1978- (author), Spasojevic, Predrag (chair), Raychaudhuri, Dipankar (internal member), Gruteser, Marco (internal member).
Subjects/Keywords: Motor vehicles – Remote sensing; Remote sensing
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APA (6th Edition):
Borota, Dušan, 1. (2012). Cooperative and multi-channel energy-based sensing in the vehicular environment: on the minimum time to sense. (Masters Thesis). Rutgers University. Retrieved from http://hdl.rutgers.edu/1782.1/rucore10001600001.ETD.000064047
Chicago Manual of Style (16th Edition):
Borota, Dušan, 1978-. “Cooperative and multi-channel energy-based sensing in the vehicular environment: on the minimum time to sense.” 2012. Masters Thesis, Rutgers University. Accessed January 18, 2021.
http://hdl.rutgers.edu/1782.1/rucore10001600001.ETD.000064047.
MLA Handbook (7th Edition):
Borota, Dušan, 1978-. “Cooperative and multi-channel energy-based sensing in the vehicular environment: on the minimum time to sense.” 2012. Web. 18 Jan 2021.
Vancouver:
Borota, Dušan 1. Cooperative and multi-channel energy-based sensing in the vehicular environment: on the minimum time to sense. [Internet] [Masters thesis]. Rutgers University; 2012. [cited 2021 Jan 18].
Available from: http://hdl.rutgers.edu/1782.1/rucore10001600001.ETD.000064047.
Council of Science Editors:
Borota, Dušan 1. Cooperative and multi-channel energy-based sensing in the vehicular environment: on the minimum time to sense. [Masters Thesis]. Rutgers University; 2012. Available from: http://hdl.rutgers.edu/1782.1/rucore10001600001.ETD.000064047
23.
Duraisamy, Swaminathan, 1988-.
Implementation and evaluation of a multiband OFDM ultra wide band system.
Degree: MS, Electrical and Computer Engineering, 2013, Rutgers University
URL: http://hdl.rutgers.edu/1782.1/rucore10001600001.ETD.000068847
► WPAN systems have been receiving significant attention from both industry and academia in the last 10 years and Ultra Wide Band (UWB) technology is one…
(more)
▼ WPAN systems have been receiving significant attention from both industry and academia in the last 10 years and Ultra Wide Band (UWB) technology is one among them. Nowadays, UWB systems can transmit at a data rate as high as 500 Mbps for short distances consuming very little power. When a UWB system moves from the laboratory environment to a real world scenario, several design issues are encountered such as complexity, power consumption, cost and flexibility. In this thesis, a UWB system is designed using a Multiband OFDM physical layer approach which tackles the problems mentioned above while still ensuring high data rates with less power consumption. The reason for choosing this approach over a traditional spread spectrum approach is that the system sends the signal on several sub-bands one at a time making it spectrally flexible while using lesser bandwidth and, hence, preventing the need for high speed RF circuits and ADC’s. This will reduce the design complexity and, thereby, reducing the power consumption and making this technology a low cost solution. Since the information on each of these bands uses a multicarrier (OFDM) technique, this system inherits several nice properties of OFDM such as high spectral efficiency, resilience to RF interference, robustness to multi-path, and the ability to efficiently capture multi-path energy. This thesis focuses on optimizing the Bit Error Rate (BER) performance of the system by making use of symbol diversity and multicarrier diversity techniques. Symbol diversity is implemented by sending an OFDM symbol on different sub-bands and improve the BER by combining the outputs using Maximal Ratio Combining. In multicarrier diversity, the performance is improved further by sending the same data on different subcarriers in an OFDM signal. In addition, a study of the performance by sending the data sensibly on different subcarriers in an OFDM symbol using prior channel information is conducted. The various blocks needed to design the transmitter chain and the receiver chain of the system were implemented using a LabVIEW software testbed and a frequency selective fading channel suggested by the UWB standards committee was simulated to study the performance of the system.
Advisors/Committee Members: Duraisamy, Swaminathan, 1988- (author), Spasojevic, Predrag (chair), Daut, David (internal member), Gajic, Zoran (internal member).
Subjects/Keywords: Ultra-wideband devices industry; Wireless communication systems; Radio resource management (Wireless communications); Orthogonal frequency division multiplexing
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APA (6th Edition):
Duraisamy, Swaminathan, 1. (2013). Implementation and evaluation of a multiband OFDM ultra wide band system. (Masters Thesis). Rutgers University. Retrieved from http://hdl.rutgers.edu/1782.1/rucore10001600001.ETD.000068847
Chicago Manual of Style (16th Edition):
Duraisamy, Swaminathan, 1988-. “Implementation and evaluation of a multiband OFDM ultra wide band system.” 2013. Masters Thesis, Rutgers University. Accessed January 18, 2021.
http://hdl.rutgers.edu/1782.1/rucore10001600001.ETD.000068847.
MLA Handbook (7th Edition):
Duraisamy, Swaminathan, 1988-. “Implementation and evaluation of a multiband OFDM ultra wide band system.” 2013. Web. 18 Jan 2021.
Vancouver:
Duraisamy, Swaminathan 1. Implementation and evaluation of a multiband OFDM ultra wide band system. [Internet] [Masters thesis]. Rutgers University; 2013. [cited 2021 Jan 18].
Available from: http://hdl.rutgers.edu/1782.1/rucore10001600001.ETD.000068847.
Council of Science Editors:
Duraisamy, Swaminathan 1. Implementation and evaluation of a multiband OFDM ultra wide band system. [Masters Thesis]. Rutgers University; 2013. Available from: http://hdl.rutgers.edu/1782.1/rucore10001600001.ETD.000068847
24.
Bindiganavile, Abhishek, 1986-.
Experimental evaluation of secondary NC-OFDM transceiver for coexistence with primary transmitter.
Degree: MS, Electrical and Computer Engineering, 2012, Rutgers University
URL: http://hdl.rutgers.edu/1782.1/rucore10001600001.ETD.000065087
► RF Spectrum scarcity inhibits development of newer wireless communication technologies in a big way. With the current spectrum policies, there is heavy under utilization of…
(more)
▼ RF Spectrum scarcity inhibits development of newer wireless communication technologies in a big way. With the current spectrum policies, there is heavy under utilization of available spectrum. This calls for more efficient spectrum allocation. One of the solutions to the problem is dynamic spectrum allocation algorithms. This can be achieved with the use of Cognitive Radio Technology. Cognitive radios allow for dynamic changing of transmission parameters depending on the environment and available spectrum bands. The definition of Cognitive radios terms it an intelligent radio which alters its transmission/reception parameters in accordance with the radio environment and the network state to utilize spectrum efficiently. Cognitive radio technology allows for use of unlicensed secondary devices to utilize spectrum unused by licensed primary devices. The secondary devices can utilize the spectrum and transmit in bands not used by the primary devices in order to avoid any detrimental interference to the licensed primary users. This calls for stringent control of the secondary transceiver. In this thesis, we focus on designing an LTE standard based Non Contiguous Orthogonal Frequency Division Multiplexing Secondary Transceiver. The major focus has been on hardware design of the secondary LTE transceiver and a system level implementation on a National Instruments based Real Time Embedded Controller platform, with relevant design blocks developed on FPGA hardware for efficient implementation. The various functionalities and tradeoffs involving hardware design of a transceiver have been studied. In addition, the effect of employing FPGA based design with a view of resource utilization and latency of the whole transceiver system, has been considered. Dynamic Spectrum Access setup was evaluated with the NI based secondary transceiver platform by evaluating the secondary receiver's performance in the presence of a primary user in the notch. This allowed for efficient utilization of spectrum for the unlicensed secondary user without causing detrimental interference to the primary user's signal.
Advisors/Committee Members: Bindiganavile, Abhishek, 1986- (author), Spasojevic, Predrag (chair), Daut, David G (internal member), Walling, Jeffrey S (internal member).
Subjects/Keywords: Cognitive radio networks; Radio – Transmitter-receivers
…Wireless testbed at WINLAB,
Rutgers University.
• National Instruments based LabView Real Time…
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APA (6th Edition):
Bindiganavile, Abhishek, 1. (2012). Experimental evaluation of secondary NC-OFDM transceiver for coexistence with primary transmitter. (Masters Thesis). Rutgers University. Retrieved from http://hdl.rutgers.edu/1782.1/rucore10001600001.ETD.000065087
Chicago Manual of Style (16th Edition):
Bindiganavile, Abhishek, 1986-. “Experimental evaluation of secondary NC-OFDM transceiver for coexistence with primary transmitter.” 2012. Masters Thesis, Rutgers University. Accessed January 18, 2021.
http://hdl.rutgers.edu/1782.1/rucore10001600001.ETD.000065087.
MLA Handbook (7th Edition):
Bindiganavile, Abhishek, 1986-. “Experimental evaluation of secondary NC-OFDM transceiver for coexistence with primary transmitter.” 2012. Web. 18 Jan 2021.
Vancouver:
Bindiganavile, Abhishek 1. Experimental evaluation of secondary NC-OFDM transceiver for coexistence with primary transmitter. [Internet] [Masters thesis]. Rutgers University; 2012. [cited 2021 Jan 18].
Available from: http://hdl.rutgers.edu/1782.1/rucore10001600001.ETD.000065087.
Council of Science Editors:
Bindiganavile, Abhishek 1. Experimental evaluation of secondary NC-OFDM transceiver for coexistence with primary transmitter. [Masters Thesis]. Rutgers University; 2012. Available from: http://hdl.rutgers.edu/1782.1/rucore10001600001.ETD.000065087
25.
Li, Yao, 1984-.
Content networking with packet-level coding.
Degree: Electrical and Computer Engineering, 2012, Rutgers University
URL: http://hdl.rutgers.edu/1782.1/rucore10001600001.ETD.000066891
Subjects/Keywords: Computer networks – Management; Packet switching (Data transmission)
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APA (6th Edition):
Li, Yao, 1. (2012). Content networking with packet-level coding. (Thesis). Rutgers University. Retrieved from http://hdl.rutgers.edu/1782.1/rucore10001600001.ETD.000066891
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Li, Yao, 1984-. “Content networking with packet-level coding.” 2012. Thesis, Rutgers University. Accessed January 18, 2021.
http://hdl.rutgers.edu/1782.1/rucore10001600001.ETD.000066891.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Li, Yao, 1984-. “Content networking with packet-level coding.” 2012. Web. 18 Jan 2021.
Vancouver:
Li, Yao 1. Content networking with packet-level coding. [Internet] [Thesis]. Rutgers University; 2012. [cited 2021 Jan 18].
Available from: http://hdl.rutgers.edu/1782.1/rucore10001600001.ETD.000066891.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Li, Yao 1. Content networking with packet-level coding. [Thesis]. Rutgers University; 2012. Available from: http://hdl.rutgers.edu/1782.1/rucore10001600001.ETD.000066891
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
26.
Ramachandran, Kishore.
Agile and robust resource management in CSMA wireless networks:.
Degree: PhD, Electrical and Computer Engineering, 2009, Rutgers University
URL: http://hdl.rutgers.edu/1782.2/rucore10001600001.ETD.000051062
► With the recent push towards wireless broadband, and user migration towards mobile devices, it has become imperative for wireless networks to support higher network capacity,…
(more)
▼ With the recent push towards wireless broadband, and user migration towards mobile devices, it has become imperative for wireless networks to support higher network capacity, increased battery life, and greater mobility. While a combination of both local- and wide-area wireless technologies will be needed to meet these requirements, we believe that carrier-sense multiple-access (CSMA) wireless networks, if designed well, can play an important role in the future. Traditional CSMA wireless networks, which form the basis for today's ubiquitous wireless LAN technology – IEEE 802.11 or WiFi, cannot satisfy the stated requirements mainly because they lack efficient resource management (or resource parameter adaptation) techniques. Several fundamental characteristics of these networks, and practical implementation challenges, also limit the applicability of solutions from other domains. Taken together, these considerations force us to fundamentally re-think the design of resource parameter adaptation for CSMA wireless networks.
In this dissertation, we first identify that, to satisfy the requirements, resource management techniques for CSMA wireless networks should possess two fundamental, but conflicting properties, agility, and robustness. Briefly, to provide increased bandwidth to mobile users, agile solutions are required that exploit opportunities for improved performance; at the same time, solutions cannot afford to compromise on link robustness. In addition, we realize that striking this trade-off effectively calls for different solutions in indoor and outdoor environments. To prove these hypotheses, we present the design and implementation of two resource management frameworks, Symphony and Sonata, for indoor and outdoor environments respectively. Indoors, Symphony increases network capacity and battery life for mobile clients by addressing the classical problem of joint, per-link, transmit power control and rate adaptation. For improved robustness, Symphony uses novel mechanisms based on measuring the expected transmission time (ETT), and the utility of RTS/CTS frames, while relying on a learning approach to converge quickly to the right resource parameter choice. Outdoors, the Sonata framework introduces a novel and fundamental tradeoff between directionality and base station diversity for uplink transmissions. Using a new location-based approach for improved parameter convergence, Sonata is able strike the agility-robustness tradeoff effectively.
Together, these frameworks prove that, achieving the right balance between agility and robustness can enable CSMA wireless networks to transition to the wireless broadband era.
Advisors/Committee Members: Ramachandran, Kishore (author), Gruteser, Marco (chair), Raychaudhuri, Dipankar (internal member), Spasojevic, Predrag (internal member), Kokku, Ravi (outside member).
Subjects/Keywords: Wireless LANs
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APA (6th Edition):
Ramachandran, K. (2009). Agile and robust resource management in CSMA wireless networks:. (Doctoral Dissertation). Rutgers University. Retrieved from http://hdl.rutgers.edu/1782.2/rucore10001600001.ETD.000051062
Chicago Manual of Style (16th Edition):
Ramachandran, Kishore. “Agile and robust resource management in CSMA wireless networks:.” 2009. Doctoral Dissertation, Rutgers University. Accessed January 18, 2021.
http://hdl.rutgers.edu/1782.2/rucore10001600001.ETD.000051062.
MLA Handbook (7th Edition):
Ramachandran, Kishore. “Agile and robust resource management in CSMA wireless networks:.” 2009. Web. 18 Jan 2021.
Vancouver:
Ramachandran K. Agile and robust resource management in CSMA wireless networks:. [Internet] [Doctoral dissertation]. Rutgers University; 2009. [cited 2021 Jan 18].
Available from: http://hdl.rutgers.edu/1782.2/rucore10001600001.ETD.000051062.
Council of Science Editors:
Ramachandran K. Agile and robust resource management in CSMA wireless networks:. [Doctoral Dissertation]. Rutgers University; 2009. Available from: http://hdl.rutgers.edu/1782.2/rucore10001600001.ETD.000051062
27.
Wani, Mohit Gopal, 1983-.
ASIP data-plane processor for multi-standard wireless protocol processing.
Degree: MS, Electrical and Computer Engineering, 2010, Rutgers University
URL: http://hdl.rutgers.edu/1782.1/rucore10001600001.ETD.000056859
► Evolving Multi-Protocol Multi-Band Software Defined Radio (SDR) devices aim at supporting multiple protocols seamlessly and efficiently. The design of such radios necessitates flexibility in physical…
(more)
▼ Evolving Multi-Protocol Multi-Band Software Defined Radio (SDR) devices aim at supporting multiple protocols seamlessly and efficiently. The design of such radios necessitates flexibility in physical layer processing, flexibility in routing packets through processing engines and flexibility in radio frequency reception/transmission. This dissertation addresses an efficient implementation of flexible physical layer processing (PHY) for Interleaving, De-Interleaving and linear Minimum Mean Square Error (MMSE) detection in Multiple Input Multiple Output (MIMO) receivers through Application Specific Instruction Set Processors (ASIPs). The thesis defines and develops a WINLAB cognitive radio (WiNC2R) compatible data-plane ASIP architecture along with suitable hardware-software partitioning of the Processing Engine unit. Given the requirement of very significant design time and the lack of the flexibility after design, dedicated ASIC for PHY may not be a viable option although it has the best performance among all available options. The software application running on general purpose processor cannot satisfy the throughput requirements of the wireless standards. ASIPs provide a better trade-off between flexibility and performance, with the advantage of considerably lower design time than ASICs. We design an efficient multi-standard (802.11a, 802.16e/m) supporting Interleaver/De-Interleaver ASIP, satisfying the throughput requirements for all the modulation-schemes/data-rates in both of the standards. It can be programmed to scale for supporting future wireless standards (that use Block Interleaving/De-Interleaving). We also study viability of a flexible MIMO MMSE detector ASIP supporting variable MR (Number of receiving antennas) * MT (Number of transmitting antennas) operations. We have analyzed the implementation of an hardware-centric algorithm for MIMO detection on an ASIP and also improved its performance with the help of techniques such as fixed point implementation, Single Instruction Multiple Data (SIMD) and Very Long Instruction Word (VLIW). Analysis of the design performance results for MIMO ASIP indicates the limitations of hardware-implementation-specific algorithms on ASIP. We also provide the account of design decisions such as custom ports, memory interfaces and registers that are added to the data-plane processor ASIPs in order to substitute them for dedicated hardware engines in the WiNC2R platform.
Advisors/Committee Members: Wani, Mohit Gopal, 1983- (author), Spasojevic, Predrag (chair), Chakraborty, Tapan (internal member), Raychaudhuri, Dipankar (internal member), Miljanic, Zoran (outside member).
Subjects/Keywords: Wireless Application Protocol (Computer network protocol); Microprocessors; Wireless communication systems; Software architecture
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APA (6th Edition):
Wani, Mohit Gopal, 1. (2010). ASIP data-plane processor for multi-standard wireless protocol processing. (Masters Thesis). Rutgers University. Retrieved from http://hdl.rutgers.edu/1782.1/rucore10001600001.ETD.000056859
Chicago Manual of Style (16th Edition):
Wani, Mohit Gopal, 1983-. “ASIP data-plane processor for multi-standard wireless protocol processing.” 2010. Masters Thesis, Rutgers University. Accessed January 18, 2021.
http://hdl.rutgers.edu/1782.1/rucore10001600001.ETD.000056859.
MLA Handbook (7th Edition):
Wani, Mohit Gopal, 1983-. “ASIP data-plane processor for multi-standard wireless protocol processing.” 2010. Web. 18 Jan 2021.
Vancouver:
Wani, Mohit Gopal 1. ASIP data-plane processor for multi-standard wireless protocol processing. [Internet] [Masters thesis]. Rutgers University; 2010. [cited 2021 Jan 18].
Available from: http://hdl.rutgers.edu/1782.1/rucore10001600001.ETD.000056859.
Council of Science Editors:
Wani, Mohit Gopal 1. ASIP data-plane processor for multi-standard wireless protocol processing. [Masters Thesis]. Rutgers University; 2010. Available from: http://hdl.rutgers.edu/1782.1/rucore10001600001.ETD.000056859
28.
Bakshi, Hrishikesh.
Framework for crawling and local event detection using twitter data.
Degree: MS, Electrical and Computer Engineering, 2011, Rutgers University
URL: http://hdl.rutgers.edu/1782.1/rucore10001600001.ETD.000060984
► Twitter is a popular social media service, with millions of registered users as of December 2010. Twitter hosts substantial amounts of user-contributed data of real-world…
(more)
▼ Twitter is a popular social media service, with millions of registered users as of December 2010. Twitter hosts substantial amounts of user-contributed data of real-world events. Twitter‟s core functions represent a simple social awareness stream model. Twitter users share information about upcoming events, the events the users are attending and events being broadcasted. The users also specify their location in their profile on Twitter. We can programmatically collect data from Twitter using their API and detect top terms and events in the data. Researchers can use this program to collect any kind of data from social networks easily. Journalists can get a real time the list of events detected by this method. In this thesis, we propose a solution to tackle the problem above. We wrote scripts that collected Twitter data through Twitter API. The scripts collect data according to user location and by search keywords. We built a web interface that provides mechanism to manage the collection of data. The web interface allows addition of new locations and keywords to the data collection. We collected Twitter data for important locations across the United States of America and the world using these tools. We use two approaches to detect trends in the data. In the first approach, we detected spikes in data by looking at overall rate of tweets at each location over a period of time. In the second approach, .we indexed the data according to location and time of the day. Then, we identified trends in the indexed data by ranking the terms according to spikes in term frequency. Using our framework, we can detect the top events and trends for a given time period and location according to Twitter data.
Advisors/Committee Members: Bakshi, Hrishikesh (author), Trappe, Wade (chair), Gruteser, Marco (internal member), Spasojevic, Predrag (internal member), Naaman, Mor (outside member).
Subjects/Keywords: Twitter; Online social networks
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APA (6th Edition):
Bakshi, H. (2011). Framework for crawling and local event detection using twitter data. (Masters Thesis). Rutgers University. Retrieved from http://hdl.rutgers.edu/1782.1/rucore10001600001.ETD.000060984
Chicago Manual of Style (16th Edition):
Bakshi, Hrishikesh. “Framework for crawling and local event detection using twitter data.” 2011. Masters Thesis, Rutgers University. Accessed January 18, 2021.
http://hdl.rutgers.edu/1782.1/rucore10001600001.ETD.000060984.
MLA Handbook (7th Edition):
Bakshi, Hrishikesh. “Framework for crawling and local event detection using twitter data.” 2011. Web. 18 Jan 2021.
Vancouver:
Bakshi H. Framework for crawling and local event detection using twitter data. [Internet] [Masters thesis]. Rutgers University; 2011. [cited 2021 Jan 18].
Available from: http://hdl.rutgers.edu/1782.1/rucore10001600001.ETD.000060984.
Council of Science Editors:
Bakshi H. Framework for crawling and local event detection using twitter data. [Masters Thesis]. Rutgers University; 2011. Available from: http://hdl.rutgers.edu/1782.1/rucore10001600001.ETD.000060984
29.
Ivkovic, Goran.
Localization of packet based radio transmitters in space, time and frequency.
Degree: Electrical and Computer Engineering, 2013, Rutgers University
URL: http://hdl.rutgers.edu/1782.1/rucore10001600001.ETD.000068884
Subjects/Keywords: Signal theory (Telecommunication)
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APA (6th Edition):
Ivkovic, G. (2013). Localization of packet based radio transmitters in space, time and frequency. (Thesis). Rutgers University. Retrieved from http://hdl.rutgers.edu/1782.1/rucore10001600001.ETD.000068884
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Ivkovic, Goran. “Localization of packet based radio transmitters in space, time and frequency.” 2013. Thesis, Rutgers University. Accessed January 18, 2021.
http://hdl.rutgers.edu/1782.1/rucore10001600001.ETD.000068884.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Ivkovic, Goran. “Localization of packet based radio transmitters in space, time and frequency.” 2013. Web. 18 Jan 2021.
Vancouver:
Ivkovic G. Localization of packet based radio transmitters in space, time and frequency. [Internet] [Thesis]. Rutgers University; 2013. [cited 2021 Jan 18].
Available from: http://hdl.rutgers.edu/1782.1/rucore10001600001.ETD.000068884.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Ivkovic G. Localization of packet based radio transmitters in space, time and frequency. [Thesis]. Rutgers University; 2013. Available from: http://hdl.rutgers.edu/1782.1/rucore10001600001.ETD.000068884
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
30.
Vivek Sarathy, Sabarish Karthik, 1988-.
On a 3GPP ray-based spatial channel model for MIMO system emulation: implementation and evaluation.
Degree: MS, Electrical and Computer Engineering, 2013, Rutgers University
URL: http://hdl.rutgers.edu/1782.1/rucore10001600001.ETD.000067851
► The mitigation of random effects in a wireless communication channel is a problem considered for many years. In the present day context, given the ever…
(more)
▼ The mitigation of random effects in a wireless communication channel is a problem considered for many years. In the present day context, given the ever increasing need for, and growth of, bandwidth intensive applications like streaming wireless HD video on fast moving user equipment (UEs, i.e., user communication devices), this issue has intensified from being a theoretical pursuit to a must-be-solved practical endeavor. In that regard, the ability to accurately model the outdoor (or indoor) propagation conditions in a laboratory setting becomes vital to validating state-of-the-art wireless standards and the devices that derive from them. Laboratory-based analysis is a significant catalyst in reducing the time-to-market for telecom equipment manufacturers. Modeling a wireless channel has been a topic under quite a bit of study. This has progressed from the Jakes model developed for single antenna systems to the correlation and ray-based models used for multiple antenna systems. The models prescribed by the 3rd Generation Partnership Project (3GPP) in its standards, like the ray-based model, aim to realistically reproduce channel environments in software and hardware, by incorporating all the variables that characterize any particular fading scenario. In this thesis, the technical report produced by 3GPP detailing the Spatial Channel Modeling (SCM) for multiple input multiple output (MIMO) simulations is followed closely as a basis for developing a real-time channel emulator on a National Instruments (NI) based Real Time (RT) Platform. First, a general purpose channel emulator is described in terms of its structure and functionality and currently known channel models are briefly investigated. Next, the spatial channel model in the standard is described in detail along with the reasons for choosing to use it in the thesis. All the parameters involved are defined, and the formula for constructing the channel is carefully investigated. Next, the channel emulator built on the National Instruments LabVIEW platform is described along with both the changes and modifications made to the design parameters so as to adapt it to the operating constraints of the RT platform. The spatial and temporal characteristics of the model are also described and plotted. Finally, the model is tested for reliability by methodically changing the various channel parameters and observing their effects on an Orthogonal Frequency Division Multiplexing (OFDM) test vector by generating BER performance plots in MATLAB. Diversity schemes are also employed to improve rate performance.
Advisors/Committee Members: Vivek Sarathy, Sabarish Karthik, 1988- (author), Spasojevic, Predrag (chair), Gruteser, Marco (internal member), Daut, David (internal member).
Subjects/Keywords: MIMO systems – Stability; Wireless communication systems – Management
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APA ·
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APA (6th Edition):
Vivek Sarathy, Sabarish Karthik, 1. (2013). On a 3GPP ray-based spatial channel model for MIMO system emulation: implementation and evaluation. (Masters Thesis). Rutgers University. Retrieved from http://hdl.rutgers.edu/1782.1/rucore10001600001.ETD.000067851
Chicago Manual of Style (16th Edition):
Vivek Sarathy, Sabarish Karthik, 1988-. “On a 3GPP ray-based spatial channel model for MIMO system emulation: implementation and evaluation.” 2013. Masters Thesis, Rutgers University. Accessed January 18, 2021.
http://hdl.rutgers.edu/1782.1/rucore10001600001.ETD.000067851.
MLA Handbook (7th Edition):
Vivek Sarathy, Sabarish Karthik, 1988-. “On a 3GPP ray-based spatial channel model for MIMO system emulation: implementation and evaluation.” 2013. Web. 18 Jan 2021.
Vancouver:
Vivek Sarathy, Sabarish Karthik 1. On a 3GPP ray-based spatial channel model for MIMO system emulation: implementation and evaluation. [Internet] [Masters thesis]. Rutgers University; 2013. [cited 2021 Jan 18].
Available from: http://hdl.rutgers.edu/1782.1/rucore10001600001.ETD.000067851.
Council of Science Editors:
Vivek Sarathy, Sabarish Karthik 1. On a 3GPP ray-based spatial channel model for MIMO system emulation: implementation and evaluation. [Masters Thesis]. Rutgers University; 2013. Available from: http://hdl.rutgers.edu/1782.1/rucore10001600001.ETD.000067851
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Open Access Theses and Dissertations
