Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 73 for “"localization accuracy"”.
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VISUAL LOCALIZATION ACCURACY DETERMINES THE BIAS OF AUDITORY TARGETS IN AZIMUTH AND DEPTH
… discrepant signal that is localized with less accuracy, such as a sound, when the two signals are perceived as unified. Many previous studies have demonstrated visual bias in azimuth, but none have directly tested, or found, this effect in depth. By increasing the saliency of the auditory and …
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The Effect of Motor Responses Versus Verbal Responses on Sound Localization Accuracy in Young Children with Normal Hearing
<p>Rationale. Sound localization is the ability to pinpoint the origin of a sound source within an auditory space. This ability is essential for safety, orientation, and communication. Poor sound localization abilities, especially in young children, can have a negative impact on academics and …
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HEAD MOTION EVALUATION AND CORRECTION IN MAGNETOENCEPHALOGRAPHY
… (MEG) data acquisition lead to inaccuracy in MEG signal localization and statistical sensitivity. Multiple head motion correction methods have been developed and validated to insure the head motion effects are removed, with the aim of improving localization accuracy and statistical …
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Rss Based Localization In A Rayleigh Fading Environment
… improvement that can be obtained in sensor agent localization accuracy as a function of the number of multipath components that can be resolved. We assume that a known number sensor agents are located at unknown coordinates within a rectangular grid having anchors at the corner locations, whose …
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Fundamental limits of wideband localization
… signals are envisioned to be used in future localization systems, since such signals can provide accurate range measurements. In this paper, we investigate the localization performance of wideband networks and proposed a performance measure called the squared position error bound (SPEB) to …
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The Effects of Sound Cue Characteristics on Overcoming Front/Back Localization Errors in a 3-D Auditory Display
… 3-D auditory display sound stimulus to increase localization accuracy. Previous literature has provided evidence that localization accuracy for direct front and direct back regions is significantly worse than that of locations in the periphery for virtual 3-D auditory stimuli. In the study …
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Compressive super-localization
Localization accuracy is a fundamental quantity of an imaging system, since it often determines the performance (e.g. effective resolution, sensitivity) of the system. This thesis studies the influence on localization accuracy of finite sampling rate, number of samples, and noise in the data …
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Target localization in MIMO radar systems
… research. In this dissertation, target localization accuracy performance, attainable by the use of MIMO radar systems, configured with multiple transmit and receive sensors, widely distributed over an area, are studied. The Cramer-Rao lower bound (CRLB) for target localization accuracy …
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Sensor distribution for collaborative localization using radio ranging
This thesis explores the localization of a group of networked agents using range measurements between themselves in a global reference frame. While operating in an environment with sparse Global Positioning System availability and intermittent inter-agent range measurements, additional sensors may …
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Optimizing range aware localization in wireless sensor networks (WSNs)
… it already exists. In emerging applications, localization is an essential function so that all the sensed information can be responded carefully. Among the range free and range aware localization, range aware localization has been the most promising for fine-grained accuracy. Range aware …
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Node localization in underwater sensor networks (UWSN)
<p>"This dissertation focuses on node localization in underwater wireless sensor networks (UWSNs) where anchor nodes have knowledge of their own locations and communicate with sensor nodes in acoustic or magnetic induction (MI) means. The sensor nodes utilize the communication signals and the …
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RL-SAR: A Robotic System for Fine-Grained RFID Localization using RL-based Synthetic Aperture Radar
Efficient localization of RFID-tagged items is crucial in scenarios that require tracking and managing a large inventory. Current systems for fine-grained RFID localization have shown limitations since they only collect measurements on a pre-defined trajectory or optimize measurement locations for …
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A MATLAB-Based Subject-Specific Framework for Vessel Quantification and Localization in Longitudinal Photoacoustic Neuroimaging
… framework for vessel quantification and localization in longitudinal photoacoustic brain images, developed and evaluated on data from a single Non-Human Primate (NHP) under 3mA and 8mA peripheral electrical stimulation. The framework integrates frame registration, interactive vessel …
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Synergistic Combination of Microwaves and Acoustic Signals: Towards Improved Breast Imaging
… However, limited imaging resolution and target localization accuracy necessitate improvements in image quality for clinical applications. The integration of prior structural information has been seen to benefit microwave-based breast imaging techniques, including microwave tomography (MWT) and …
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Multimodal integration of EEG and MEG data using minimum ℓ₂-norm estimates
… and the combination of the two modalities. Localization accuracy of responses to median-nerve stimulation was evaluated to study the utility of combining MEG and EEG.
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Adaptive AUV-assisted diver navigation for loosely-coupled teaming in undersea operations
… state estimation, we enable enhanced diver localization and navigation without a surface presence. Adaptation to environmental impacts is explored through measured ocean currents as well as updates to the diver’s motion model based on state estimation analysis. These adaptations produce more …
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Adaptive AUV-assisted Diver Navigation for Loosely-Coupled Teaming in Undersea Operations
… state estimation, we enable enhanced diver localization and navigation without a surface presence. Adaptation to environmental impacts is explored through measured ocean currents as well as updates to the diver’s motion model based on state estimation analysis. These adaptations produce more …
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Data Analytics-backed Vehicular Crowd-sensing for GPS-less Tracking in Public Transportation
… (e.g. high energy consumption, inaccurate localization in certain environments such as indoor, and privacy violation due to direct location sharing). To this end, we propose a novel framework, in our initial approach, to emulate the functionality of a sensor by using multiple available soft …
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iNav : a hybrid approach to WiFi localization and tracking of mobile devices
… presents iNav - a hybrid system for 802.11-based localization targeted at low-power mobile devices. WiFi localization enables numerous location-based services and applications without requiring a separate GPS module, thus offering device cost and power consumption savings. iNav is a WiFi …
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Peer-to-peer wireless ultrawide-band localization of fast-moving entities
This thesis presents peer-to-peer localization techniques such that a group of mobile nodes can continuously track its topology, without relying on external infrastructure. Ultrawide-band (UWB) radios worn by each node (humans in our case) perform time-of-flight (TOF) measurements between different …
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