Index Catalog // ScholarsArchive@OSU

A 5 GHz Wi-Fi Receiver Front End with 4x80 MHz Channels for a High Accuracy Indoor Localization System

Creator:: Gray, Kyle L.
Abstract:: The ability to accurately locate people and objects indoors will enable opportunities for control and automation of indoor environments. Current indoor localization solutions require dedicated hardware which must be custom tailored to each application. There are large technological, societal, and economic benefits in developing a more general purpose system that...
Resource Type:: Masters Thesis

A channelized digital receiver design for UWB sytems in a multipath indoor environment

Creator:: Chang, Yuhao
Abstract:: This thesis presents a channelized digital receiver design for UWB sytems in a multipath indoor environment. The UWB technology has been used for commercial and military purposes due to a number of advantages such as low-power consumption, noise-like and carrier free. The energy of UWB signal is spread over a...
Resource Type:: Masters Thesis

A comparative study of lowpass continuous-time delta-sigma modulators with pulse-shaped DACs

Creator:: Fang, Jie
Abstract:: Recently, continuous-time ΔΣ modulators are appearing increasingly often in both the literature and the marketplace due to their features of inherent antialiasing and relaxed requirements for opamp and so on. However, several nonideal factors such as clock jitter, excess loop delay, inter-symbol interference and so on, degrade the SNR performance...
Resource Type:: Masters Thesis

A fully digital technique for the estimation and correction of the DAC error in multi-bit delta sigma ADCs

Creator:: Wang, Xuesheng
Abstract:: This thesis proposes a novel fully digital technique for the estimation and correction of the DAC error in multi-bit delta sigma ADCs. The structure of the DAC error is indicated through a simple model for unit-element based DACs. The impact of the DAC error on the performance of ADC is...
Resource Type:: Dissertation

A Microwave Signal Correlator Based on Parametric Pumping of Spin Waves

Creator:: Hansen, Mikkel N.
Abstract:: This work demonstrates correlation of microwave signals encoded with 16-bit codes using the parametric interaction of spin waves. Signal processing correlators are devices that compare two signals, such as a reference code and a received code, where the output indicates the similarity between the signals. Correlators are used in communication...
Resource Type:: Masters Thesis

A multi-bit hybrid DSM over full-scale range without feedback DEM

Creator:: Kwon, Sunwoo, 1974-
Abstract:: Evolution of the mobile communication standards and proliferation of hand-held devices mandate stringent Analog-to-Digital Converter (ADC) speciﬁcations. Among various ADCs, a ∆Σ ADC is best known as a power-eﬃcient ADC when more than 12b is required. However, a conventional discrete-time (DT) ∆Σ Modulator (∆ΣM) is inadequate for low-power wideband applications...
Resource Type:: Dissertation

A study of basic building blocks of analog-to-digital delta-sigma modulators

Creator:: Guo, Yuhua
Abstract:: In this thesis, a novel Direct-Charge-Transfer (DCT) integrator structure is proposed, which can settle much faster than regular switch-capacitor integrators. A new Spread-Spectrum Dynamic Element Matching (SS-DEM) algorithm is also introduced, which can effectively spread or shape the nonlinearity error of multi-bit DAC in the feedback path, thus improve the...
Resource Type:: Masters Thesis

A survey on continuous-time modulators : theory, designs and implementations

Creator:: Gao, Xiaoran
Abstract:: Recently, delta-sigma modulation has become a widely applied technique for high-performance analog-to-digital conversion of narrow-band signals. Most of the early designs used discrete-time structure for good accuracy and good linearity. The transfer functions are independent of the clock frequency. However, high unity-gain bandwidths of the opamps are required to satisfy...
Resource Type:: Masters Thesis

Adaptive load balancing metric for WLANs

Creator:: Ryou, Jong bum
Abstract:: As the number of mobile devices accessing large-scale WLANs such as campus and metropolitan area networks increases, the need for load balancing among the cells becomes crucial. In addition, the network must also support some minimum handoff tolerance defined by an application. A number of load balancing techniques have been...
Resource Type:: Dissertation

Adaptive Streaming Methods using Dual Protocols and Reinforcement Learning

Creator:: Gatimu, Kevin
Abstract:: The ubiquity of high quality video and proliferation of mobile devices has contributed to an unprecedented rise in video consumption. HTTP, in conjunction with adaptive streaming, has become the de facto mechanism for delivering the vast majority of video as it readily caters to heterogeneous networks and devices. This dissertation...
Resource Type:: Dissertation

ScholarsArchive@OSU

A 5 GHz Wi-Fi Receiver Front End with 4x80 MHz Channels for a High Accuracy Indoor Localization System

A channelized digital receiver design for UWB sytems in a multipath indoor environment

A comparative study of lowpass continuous-time delta-sigma modulators with pulse-shaped DACs

A fully digital technique for the estimation and correction of the DAC error in multi-bit delta sigma ADCs

A Microwave Signal Correlator Based on Parametric Pumping of Spin Waves

A multi-bit hybrid DSM over full-scale range without feedback DEM

A study of basic building blocks of analog-to-digital delta-sigma modulators

A survey on continuous-time modulators : theory, designs and implementations

Adaptive load balancing metric for WLANs

Adaptive Streaming Methods using Dual Protocols and Reinforcement Learning

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