Index Catalog // ScholarsArchive@OSU

Indoor Localization Using Direction of Arrival Approach

Creator:: Zhang, Tingwei
Abstract:: In this paper, a Direction of Arrival (DOA) based system is proposed. This method searches the direction relative to the array to find where the signal source is located. The proposed system can achieve sub-meter level accuracy with a near real-time update rate. Also, we introduced several refinement methods including...
Resource Type:: Masters Thesis
Full Text:: matrix that indicates the signal phase difference between antennas, s is the source signal, and n is

Secrecy of massive MIMO systems under antenna failure

Creator:: Assiri, Mohammad
Abstract:: As the fifth generation of mobile communication systems (5G) is being deployed, massive multiple-input multiple-output (MIMO) serves as one of its enabling technologies where reliable and ultra low latency communications are achieved while being power and spectrum efficient. This thesis studies the security aspect of massive MIMO system from the...
Resource Type:: Dissertation

Multiple Nonlinear Model Predictive Control for a Six-body System Oscillating Water Column Wave Energy Converters Array

Creator:: Xu, Zhicheng
Abstract:: This research presents the design of three nonlinear model predictive controllers (NMPCs) for floating oscillating water column (OWC) wave energy converters (WECs) array to maximize generated power, augmented with the control of the high-speed stop valves (HSSVs). Key to this design is the development of a high-fidelity discretized model for...
Resource Type:: Masters Thesis
Full Text:: Jinsub Kim, and graduate council representative, Prof. William H. Warnes. I truly appreciate the

Information theoretic approach to quantization and classification for signal processing, communications, and machine learning applications

Creator:: Thuan Nguyen D.
Abstract:: There are five main contributions of this dissertation. The first contribution is new closed-form expressions for channel capacity of a new class of channel matrices. The second contribution is the discovery of the structure for optimal binary quantizer and the associated methods for finding an optimal quantizer that maximizes mutual...
Resource Type:: Dissertation
Full Text:: . . . . . . . . . . . . . . . 131 6.4 (a) S(emax) as a function of emax; (b) Nmin = 2S(e max) as a function of emax. . . . 131 6.5

The Partitioning Technique of Power System to Improve the Observability of Sub-System for Multi-area State Estimation

Creator:: Lyu, Tao
Abstract:: An accurate state estimation plays an essential role in power system operation and planning in energy management systems. However, existing multi-area state estimation researches have not focused on the importance of system clustering. The clustering mechanism divides or partitions a system according to user-defined criteria. Few published research works have...
Resource Type:: Dissertation
Full Text:: like to thank my committee members, Prof. Ted Brekken and Prof. Jinsub Kim. Lastly, I would like to

An enhanced swing differential Colpitts CMOS VCO for low-voltage operation

Creator:: Farahbakhshian, Farhad
Abstract:: An enhanced swing differential Colpitts VCO (ESDC-VCO) dramatically improves the swing of a Colpitts VCO by allowing the signal to swing below ground and above the supply voltage. Fabricated in a 1P8M 0.13 um CMOS process, the ESDC-VCO operates at 4.9GHz with a 0.475-V supply and consumes 2.7mW. The measured...
Resource Type:: Masters Thesis
Full Text:: reported to date for any integrated LC VCO. 27 BIBLIOGRAPHY [1] P. Choi, H. C. Park, S. Kim, S. Park

Non Newtonian viscosity of bulk metallic glass forming liquids and the ordering and shear rate induced crystallization of undercooled Zr₄₁.₂Ti₁₃.₈Cu₁₂.₅Ni₁₀.₀Be₂₂.₅ metallic glass forming melt

Creator:: Wadhwa, Prashant
Abstract:: The influence of shear rate and temperature on the viscosity and fragility of the Zr₄₁.₂Ti₁₃.₈Cu₁₂.₅Ni₁₀.₀Be₂₂.₅ (Vit1) metallic glass forming liquid is measured in the liquid and undercooled liquid state between 907 and 1300 K. The results show a complex rheological behavior of Vit1. The viscosity of Vit1 is about three...
Resource Type:: Dissertation
Full Text:: . Vit1 exhibits the highest viscosity with the largest drop in viscosity on shearing from 0.1 s-1 to

Exploratory Studies Within the Exotic Lyonsite Structure

Creator:: Tang, Joseph N.
Abstract:: Structure-property relationships have always underpinned the field of solid state chemistry; dependable structural descriptions are integral to understanding and controlling the physical properties of inorganic compounds old and new. While a handful of crystal structures are celebrated for their versatility, flexibility, and functionality, the existence of more exotic structures is...
Resource Type:: Dissertation
Full Text:: review of the manuscript on which this chapter is primarily based; J. N. Tang, S. Svadlenak, M. K

Switch-capacitor Power Amplifier with Enhanced Power Back-off Efficiency and Linearity

Creator:: Qiao, Bo
Abstract:: Nowadays, wireless communication systems use high-order quadrature amplitude modulation (QAM) together with orthogonal frequency-division multiplexing (OFDM) to increase the link capacity and robustness. These signals always have large peak-to-average power ratio (PAPR) and require power amplifiers (PAs) achieve both high efficiency and linearity simultaneously. For the efficiency, the complementary metal...
Resource Type:: Dissertation

Plasmonic Nano-Antenna and Modulator for On-Chip Optical Interconnects

Creator:: Gao, Qian
Abstract:: With the rapid growth of worldwide internet traffic in data centers and clouds, silicon photonics has been utilized to provide enormous data bandwidth and outstanding energy efficiency over electronics. Computing servers and storage servers that are connected by communication links are relying more on optical rather than electrical means mainly...
Resource Type:: Dissertation
Full Text:: Communications. Presently 100 Gb/s silicon photonic transceivers are on the market and ready for the high

ScholarsArchive@OSU

Indoor Localization Using Direction of Arrival Approach

Secrecy of massive MIMO systems under antenna failure

Multiple Nonlinear Model Predictive Control for a Six-body System Oscillating Water Column Wave Energy Converters Array

Information theoretic approach to quantization and classification for signal processing, communications, and machine learning applications

The Partitioning Technique of Power System to Improve the Observability of Sub-System for Multi-area State Estimation

An enhanced swing differential Colpitts CMOS VCO for low-voltage operation

Non Newtonian viscosity of bulk metallic glass forming liquids and the ordering and shear rate induced crystallization of undercooled Zr₄₁.₂Ti₁₃.₈Cu₁₂.₅Ni₁₀.₀Be₂₂.₅ metallic glass forming melt

Exploratory Studies Within the Exotic Lyonsite Structure

Switch-capacitor Power Amplifier with Enhanced Power Back-off Efficiency and Linearity

Plasmonic Nano-Antenna and Modulator for On-Chip Optical Interconnects

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