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 31 for “"location estimation"”.
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Location Estimation in Wireless Communication Systems
… environmental dependency, the accuracy of target location estimation is highly sensitive to the positions of reference nodes. In this thesis, we also study on the reference node placement, and derive an optimum deployment scheme which can provide the best localization accuracy. Another challenge …
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Applying multimodal sensing to human location estimation
… just one dimension of human behavior, namely ""location"". We will begin by discussing our research on localizing humans in indoor environments, a problem that requires precise tracking of human footsteps. We investigated the benefits of leveraging smartphone sensors (accelerometers, gyroscopes, …
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Location Estimation of Obstacles for an Autonomous Surface Vehicle
… the kinematic model of the ASV, maps the pixel locations of the obstacles into a global coordinate system. An Extended Kalman Filter is used to localize the ASV and the surrounding obstacles.
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Location estimation and collective inference in indoor spaces using smartphones
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2022-04-06 without embargo terms
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Location estimation in a 3D environment using radio frequency identification tags
RFID tag location estimation in a 3D environment is investigated. The location of the tag with unknown coordinates can be estimated with certain accuracy. However, accuracy can be improved using the knowledge based on measurement of additional reference tags with known location. This thesis studies …
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Distributed Location Estimation of a Moving Target Characterized by a Spatial Poisson Field
… as object detection, counting, classification, estimation and tracking. Distributed solutions provided by WSNs are often cost effective and characterized by high performance indices.;In this work, we model and simulate a distributed sensor network composed of radiation detectors and analyze its …
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Application of order-based genetic algorithms to network path searching and location estimation
… control, and VLSI routing. The problem of location estimation for a network of nonstationary nodes is considered in detail as a framework for developing a solution. In particular, the problem of estimation of the actual physical positions of a system of mobile units is considered. The …
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A bayesian approach to wireless location problems
Several approaches for indoor location estimation in wireless networks are proposed. We explore non-hierarchical and hierarchical Bayesian graphical models that use prior knowledge about physics of signal propagation, as well as different modifications of Bayesian bivariate spline models. The …
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An Optimization Approach to Indoor Location Problem Based on Received Signal Strength
… through the implementation of a low-cost indoor location system using received signal devices. Indoor location through received signal strength (RSS) is of low costs, yet it suffers from poor accuracy due to lack of direct line-of-sight, multi-path ratio propagation, and various interferences. To …
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Physical Layer Security for Wireless Position Location in the Presence of Location Spoofing
… effort has been dedicated to wireless position location over the past decades, most location security aspects have been overlooked. Recently, with the proliferation of diverse wireless devices and the desire to determine their position, there is an increasing concern about the security of …
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iNav : a hybrid approach to WiFi localization and tracking of mobile devices
… 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 localization system targeted at low-power mobile devices, capable of utilizing multiple data …
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Locating Unmanned Aerial Vehicles (UAVs)
… such restrictions have been reported. A UAV location system can help the law enforcement to be alerted and can prevent UAVs breaching any restricted area without permission. This master thesis proposes a UAV location system where each UAV has a unique identification tag. The method consists …
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Trajectory optimization for target localization using small unmanned aerial vehicles
… mission of interest involves computing location estimates for targets detected by onboard sensors. Combining UAV state estimates with information gathered by the imaging sensors leads to bearing measurements of the target that can be used to determine the target's location. This 3-D …
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Localizatation estimation usign the technique of multi-sequence positioning
… have been considered as promising tools for many location dependent applications such as area surveillance, search and rescue, mobile tracking and navigation, etc. In addition, the geographic information of sensor nodes can be critical for improving network management, topology planning, packet …
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Identification and Mitigation of NLOS based on Channel Information Rules for Indoor UWB Localization
… enable an indoor mobile vehicle to determine its location and thereby making it capable of autonomous localization under Non-light of sight (NLOS) conditions. The solution developed is based on Ultra Wideband (UWB) based Indoor Positioning System (IPS) in the building. The proposed method …
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Sensor network localization based on natural phenomena
… typical node-spacing of 2m. In addition, passive location estimation in a real deployment is found to converge as more sensory data is available; range resolutions of 2.5m and localization errors of 20.3cm were obtained after running in passive mode for 20 hours in 7m by 5m dorm hallway. The main …
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Multichannel Sense and Avoid Radar for Small UAVs
… sUAS with target detection, tracking, and 3-D location and velocity information on potential non-cooperative hazards, primarily focusing on general aviation (GA) aircraft. The resulting FMCW miniature radar system has a size weight and power (SWaP) that is suitable for installing onboard the …
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Sensor placement for microseismic event location
… event by selecting the hypothesized source location that maximizes an energy function generated from the sum of the time--aligned sensor signals. The accuracy of localization for the algorithm characterized by the variance depends in part upon the configuration of sensors. Two algorithms, …
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Android wi-fi location awareness and data inference heuristic.
… achieve their goals or improve performance. The location of the device is one of the most important pieces of context information. Location awareness makes certain applications possible, e.g., recommending nearby businesses and tracking estimated routes, and greatly improves the performance of …
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Automated High-quality Image Acquisition for UAV-enabled Bridge Visual Inspection
… was proposed for estimating the UAV’s global location in areas underneath bridge girders. This method combines Stereo Visual Inertia Odometry (SVIO) and fiducial marker-based measurements. By periodically registering the local pose estimation into a global frame and correcting accumulated …
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