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 70 for “"Received Signal Strength"”.
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Real-time localization using received signal strength
… and tracking of wireless devices using radio signal strength (RSS) measurements in an indoor environment is undertaken. This dissertation is presented in the form of five papers.</p><p>The first two papers deal with localization and placement of receivers using a range-based method where the …
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An Optimization Approach to Indoor Location Problem Based on Received Signal Strength
… 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 improve its location …
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Received Signal Strength-Based Localization of Non-Collaborative Emitters in the Presence of Correlated Shadowing
RSS-based localization is a promising solution for estimating the position of a non-collaborative emitter using a network of collaborative sensors. This paper examines RSS-based localization and differential RSS (DRSS) localization in the presence of correlated shadowing with no knowledge of the …
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Efficient localization methods for wireless sensor networks based on received signal strength = Metodos de localizacion eficiente para redes de sensores basados en la medida de la potencia de señal recibida
… measurements of some parameters of the radio signals that receive from their neighboring nodes, such as the Time of Arrival or the Received Signal Strength. Then, these measurements are processed in order to calculate the position of the nodes. Clearly, there is some energy consumption during …
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Rss Based Localization In A Rayleigh Fading Environment
… the chip level and are capable of measuring the received signal strength in each of the resolved multipath components. An error function is formulated based upon the square of the distances between the actual sensor locations and their model-predicted locations, which are functions of the …
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Pedestrian traffic monitoring using Wi-Fi technology
… to the unique MAC address of each device and received signal strength. This thesis described a mobile tracking system for tracking smartphones, based on these extracted information. This system uses sniffing stations which integrate with Wi-Fi devices, 3G devices, processors and sensors to …
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Design considerations for an indoor location service using 802.11 wireless signal strength
… of location discovery using 802.11 (Wi-Fi) signals and "organically collected" (i.e. user-generated) received signal strength maps are discussed. Several existing and novel localizer algorithms are compared on a database of organically collected data. Features of local Wi-Fi "signatures" …
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GIS Aided Radio Wave Propagation Modeling and Analysis
… is evaluated based on field measurement. The received signal strength data collected during this driving test are then analyzed in a GIS environment in a statistical approach. The effects of local geographic features are modeled in GIS by appropriate spatial analyses.
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Investigation of Indoor Propagation Algorithms for Localization Purposes: Simulation and Measurements of Indoor Propagation Algorithms for Localization Applications using Wall Correction Factors, Local Mean Power Estimation and Ray Tracing Validations
… of arrival (AOA), time of arrival (TOA) and received signal strength (RSS). Different models of path loss, shadowing and fast fading mechanisms are explored. The concept of MIMO channels is studied using many types of deterministic channel modelling such as Finite Difference Time Domain, Ray …
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Channel Propagation Model for Train to Vehicle Alert System at 5.9 GHz using Dedicated Short Range Communication
… at TTCI in Pueblo Colorado to measure the received signal strength in a train to vehicle communication environment. From the received signal strength, different channel models can be developed to characterize the communication environment. Documented metrics include large scale path loss, …
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Indoor Location Tracking and Orientation Estimation Using a Particle Filter, INS, and RSSI
… <p>This project explores the usage of using received signal strength indication (RSSI) in conjunction with an inertial navigation system (INS) to provide location estimations without the use of GPS in a Particle Filter with a small development microcontroller and base station. The paper goes …
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Radio propagation analysis for improved UAV data muling of surfaced underwater sensor nodes
… We present a mathematical model for predicting signal strength with respect to distance and height using a two-ray propagation model in conjunction with the individual radiation patterns of transmitting and receiving antennas. Signal quality over space is then be used to select best waypoints. …
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A Comprehensive Method and System for the Design and Deployment of Wireless Data Networks
… could be readily deployed on the basis of strong received signal strength and simple circuit-switched channel allocation protocols, modern and emerging wireless data networks are more noise and interference limited and rely on packet-based protocols. A heavier emphasis is needed on predicting and …
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Fundamental limits of wideband localization
… To address this problem, wide bandwidth 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 …
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A Grid based Indoor Radiolocation Technique Based on Spatially Coherent Path Loss Model
… propagation in an environment by solely using Received Signal Strength (RSS) fingerprints. The propagation of the radio waves is characterized by uniformly dividing the environment into grid cells, followed by the estimation of the propagation parameters for each grid cell individually. By …
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Locating Unmanned Aerial Vehicles (UAVs)
… methods: Time of Arrival (ToA), counter, and Received Signal Strength Indication (RSSI). Long Range Wide Area Network (LoRaWAN) protocol is utilized in the system. Initial results have shown that RSSI is the most accurate among the three methods and also has a minimal cost. Therefore, RSSI was …
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Design of a System to Monitor Youth Workers' Heat Stress and Positioning using Non-invasive Techniques
… properties of radiofrequency transmission, the Received Signal Strength Indication (RSSI) is used to approximate the distance between devices. With accuracy comparable to GPS methods and no necessity for line of sight to sky, RSSI supplies a more than adequate estimate for proximity distance. …
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Distributed Localization for Wireless Distributed Networks in Indoor Environments
… associates unique characteristics such as received signal strength (RSS) that differentiates a location from another location. The location-dependent characteristics then can be used to infer a user's location. Furthermore, fingerprinting requires no specialized hardware because of its …
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Design of a Control System for Multiple Autonomous Ground Vehicles to Achieve a Self Deployable Security Perimeter
… paper presents a novel approach based on the Received Signal Strength Indication (RSSI) measurement between broadcast and receive nodes to calculate distance and using the data transfer capability to allow each vehicle to develop a table of relative positions. These relative positions are used …
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Changes of signal level detection in a resonant microwave cavity with varying concentrations of glucose
… in a water solution (to simulate blood) and the signal level within a resonant microwave cavity, which is the key to the development of a non-invasive blood glucose monitoring system. This thesis outlines the mechanical design, electronic and software design, involved in the development of such a …
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