Download or read book An Experimental Three dimensional Indoor Localization System Using Ultra Wideband and Inertial Sensors written by Jens Schroeder and published by . This book was released on 2007 with total page 101 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Wireless Indoor Localization written by Chenshu Wu and published by Springer. This book was released on 2018-08-22 with total page 220 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides a comprehensive and in-depth understanding of wireless indoor localization for ubiquitous applications. The past decade has witnessed a flourishing of WiFi-based indoor localization, which has become one of the most popular localization solutions and has attracted considerable attention from both the academic and industrial communities. Specifically focusing on WiFi fingerprint based localization via crowdsourcing, the book follows a top-down approach and explores the three most important aspects of wireless indoor localization: deployment, maintenance, and service accuracy. After extensively reviewing the state-of-the-art literature, it highlights the latest advances in crowdsourcing-enabled WiFi localization. It elaborated the ideas, methods and systems for implementing the crowdsourcing approach for fingerprint-based localization. By tackling the problems such as: deployment costs of fingerprint database construction, maintenance overhead of fingerprint database updating, floor plan generation, and location errors, the book offers a valuable reference guide for technicians and practitioners in the field of location-based services. As the first of its kind, introducing readers to WiFi-based localization from a crowdsourcing perspective, it will greatly benefit and appeal to scientists and researchers in mobile and ubiquitous computing and related areas.
Download or read book Ultra wideband Indoor Localization Systems written by Ruiqing Ye and published by . This book was released on 2012 with total page 122 pages. Available in PDF, EPUB and Kindle. Book excerpt: Indoor localization systems have a variety of applications such as tracking of assets, indoor robot navigation, and monitoring of people (e.g. patients) in hospitals or at home. Global positioning system (GPS) offers location accuracy of several meters and is mainly used for outdoor location-based applications as its accuracy degrades significantly in indoor scenarios. Wireless local area networks (WLAN) have also been used for indoor localization, but the accuracy is too low and power consumption of WLAN terminals is too high for most applications. Ultra-wideband (UWB) localization is superior in terms of accuracy and power consumption compared with GPS and WLAN localization, and is thus more suitable for most indoor location-based applications [1-4]. The accuracy and precision requirements of localization systems depend on the specific characteristics of the applications. For example, centimeter or even millimeter localization accuracy is required for dynamic part tracking, while decimeter accuracy might be sufficient for tracking patients in hospitals or at home. Note that accuracy is not the only aspect of the overall performance of the system. Factors such as cost, range, and complexity should also be considered in system design. In the first part of this dissertation, a centimeter-accurate UWB localization system is developed. The technical challenges to achieve centimeter localization accuracy are investigated. Since all the receivers are synchronized through wire connection in this system, a wireless localization system with centimeter accuracy is introduced in order to make the system easier for deployment. A two-step synchronization algorithm with picosecond accuracy is presented, and the system is tested in a laboratory environment. The second part of this dissertation focuses on reducing the complexity of UWB localization systems when the localization accuracy requirement is relaxed. An UWB three-dimensional localization scheme with a single cluster of receivers is proposed. This scheme employs the time-of-arrival (TOA) technique and requires no wireless synchronization among the receivers. A hardware and software prototype that works in the 3.1-5.1 GHz range is constructed and tested in a laboratory environment. An average position estimation error of less than 3 decimeter is achieved by the experimental system. This TOA scheme with receivers in a single unit requires synchronization between the transmitter and the receiver unit. In order to further reduce system complexity, a new time-difference-of-arrival localization scheme is proposed. This scheme requires multiple units, each operating on its own clock. It avoids synchronization between the transmitter and receivers, and thus makes the development of the transmitter extremely simple. The performance of this system is simulated and analyzed analytically, and turns out to be satisfactory for most indoor localization applications.
Download or read book Ultra wideband Based Indoor Localization Using Sensor Fusion and Support Vector Machine written by Zhuoqi Zeng and published by Logos Verlag Berlin GmbH. This book was released on 2020-12-21 with total page 152 pages. Available in PDF, EPUB and Kindle. Book excerpt: To further improve the NLOS detection and mitigation performance for Ultra-wideband (UWB) system, this thesis systematically investigates the UWB LOS/NLOS errors. The LOS errors are evaluated in different environments and with different distances. Different blockage materials and blockage conditions are considered for NLOS errors. The UWB signal propagation is also investigated. Furthermore, the relationships between the CIRs and the accurate/inaccurate range measurements are theoretically discussed in three different situations: ideal LOS path, small-scale fading: multipath and NLOS path. These theoretical relationships are validated with real measured CIRs in the Bosch Shanghai office environment. Based on the error and signal propagation investigation results, four different algorithms are proposed for four different scenarios to improve the NLOS identification accuracy. After the comparison of the localization performance for TOA/TDOA, it is found that on normal office floor, TOA works better than TDOA. In harsh industrial environments, where NLOS frequently occurs, TDOA is more suitable than TOA. Thus, in the first scenario, the position estimation is realized with TOA on the office floor, while in the second scenario, a novel approach to combined TOA and TDOA with accurate range and range difference selection is proposed in the harsh industrial environment. The optimization of the feature combination and parameters in machine learning algorithms for accurate measurement detection is discussed for both scenarios. For the third and fourth scenarios, the UWB/IMU fusion system stays in focus. Instead of detecting the NLOS outliers by assuming that the error distributions are Gaussian, the accurate measurement detection is realized based on the triangle inequality theorem. All the proposed approaches are tested with the collected measurements from the developed UWB system. The position estimation of these approaches has better accuracy than that of the traditional methods.
Download or read book Recent Advances in Indoor Localization Systems and Technologies written by Gyula Simon and published by MDPI. This book was released on 2021-08-30 with total page 502 pages. Available in PDF, EPUB and Kindle. Book excerpt: Despite the enormous technical progress seen in the past few years, the maturity of indoor localization technologies has not yet reached the level of GNSS solutions. The 23 selected papers in this book present the recent advances and new developments in indoor localization systems and technologies, propose novel or improved methods with increased performance, provide insight into various aspects of quality control, and also introduce some unorthodox positioning methods.
Download or read book New Approach of Indoor and Outdoor Localization Systems written by Fouzia Elbahhar and published by BoD – Books on Demand. This book was released on 2012-10-10 with total page 276 pages. Available in PDF, EPUB and Kindle. Book excerpt: Accurate determination of the mobile position constitutes the basis of many new applications. This book provides a detailed account of wireless systems for positioning, signal processing, radio localization techniques (Time Difference Of Arrival), performances evaluation, and localization applications. The first section is dedicated to Satellite systems for positioning like GPS, GNSS. The second section addresses the localization applications using the wireless sensor networks. Some techniques are introduced for localization systems, especially for indoor positioning, such as Ultra Wide Band (UWB), WIFI. The last section is dedicated to Coupled GPS and other sensors. Some results of simulations, implementation and tests are given to help readers grasp the presented techniques. This is an ideal book for students, PhD students, academics and engineers in the field of Communication, localization
Download or read book Indoor Positioning and Navigation written by Simon Tomazič and published by Mdpi AG. This book was released on 2021-11-12 with total page 396 pages. Available in PDF, EPUB and Kindle. Book excerpt: In recent years, rapid development in robotics, mobile, and communication technologies has encouraged many studies in the field of localization and navigation in indoor environments. An accurate localization system that can operate in an indoor environment has considerable practical value, because it can be built into autonomous mobile systems or a personal navigation system on a smartphone for guiding people through airports, shopping malls, museums and other public institutions, etc. Such a system would be particularly useful for blind people. Modern smartphones are equipped with numerous sensors (such as inertial sensors, cameras, and barometers) and communication modules (such as WiFi, Bluetooth, NFC, LTE/5G, and UWB capabilities), which enable the implementation of various localization algorithms, namely, visual localization, inertial navigation system, and radio localization. For the mapping of indoor environments and localization of autonomous mobile sysems, LIDAR sensors are also frequently used in addition to smartphone sensors. Visual localization and inertial navigation systems are sensitive to external disturbances; therefore, sensor fusion approaches can be used for the implementation of robust localization algorithms. These have to be optimized in order to be computationally efficient, which is essential for realtime processing and low energy consumption on a smartphone or robot.
Download or read book Smartphone Based 3D Indoor Localization and Navigation written by Frank Ebner and published by Logos Verlag Berlin GmbH. This book was released on 2021-01-10 with total page 351 pages. Available in PDF, EPUB and Kindle. Book excerpt: During the last century, navigation systems have become ubiquitous and guide drivers, cyclists, and pedestrians towards their desired destinations. While operating worldwide, they rely on line-of-sight conditions towards satellites and are thus limited to outdoor areas. However, finding a gate within an airport, a ward within a hospital, or a university's auditorium also represent navigation problems. To provide navigation within such indoor environments, new approaches are required. This thesis examines pedestrian 3D indoor localization and navigation using commodity smartphones: A desirable target platform, always at hand and equipped with a multitude of sensors. The IMU (accelerometer, gyroscope, magnetometer) and barometer allow for pedestrian dead reckoning, that is, estimating relative location changes. Absolute whereabouts can be determined via Wi-Fi, an infrastructure present within most public buildings, or by using Bluetooth Low Energy Beacons as inexpensive supplement. The building's 3D floorplan not only enables navigation, but also increases accuracy by preventing impossible movements, and serves as a visual reference for the pedestrian. All aforementioned information is fused by recursive density estimation based on a particle filter. The conducted experiments cover both, theoretical backgrounds and real-world use-cases. All discussed approaches utilize the infrastructure found within most public buildings, are easy to set up, and maintain. Overall, this thesis results in an indoor localization and navigation system that can be easily deployed, without requiring any special hardware components.
Download or read book Realization Limits of Impulse Radio UWB Indoor Localization Systems written by Zwirello, Lukasz and published by KIT Scientific Publishing. This book was released on 2014-05-06 with total page 226 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this work, the realization limits of an impulse-based Ultra-Wideband (UWB) localization system for indoor applications have been thoroughly investigated and verified by measurements. The analysis spans from the position calculation algorithms, through hardware realization and modeling, up to the localization experiments conducted in realistic scenarios. The main focus was put on identification and characterization of limiting factors as well as developing methods to overcome them.
Download or read book Indoor Positioning Technologies written by Rainer Mautz and published by Sudwestdeutscher Verlag Fur Hochschulschriften AG. This book was released on 2012 with total page 152 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the age of automation the ability to navigate persons and devices in indoor environments has become increasingly important for a rising number of applications. However, we are still far away from achieving cheap provision of global indoor positioning with an accuracy of 1 meter or better. With the emergence of global satellite positioning systems, the performance of outdoor positioning has become excellent, but many mass market applications require seamless positioning capabilities in all environments. Therefore indoor positioning has become a focus of research and development during the past decade. This book categorizes all sighted indoor positioning approaches into 13 distinct technologies and describes the measuring principles of each. Individual approaches are characterized and key performance parameters are quantified.
Download or read book Proceedings of 3rd 2023 International Conference on Autonomous Unmanned Systems 3rd ICAUS 2023 written by Yi Qu and published by Springer Nature. This book was released on with total page 526 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Location Based Services and TeleCartography II written by Georg Gartner and published by Springer Science & Business Media. This book was released on 2008-10-30 with total page 471 pages. Available in PDF, EPUB and Kindle. Book excerpt: 5th International Conference on Location Based Services and TeleCartography, 2008, Salzburg
Download or read book Sensor Fusion Methods for Indoor Navigation Using UWB Radio Aided INS DR written by José Borràs Sillero and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: [ANGLÈS] Some applications such as industrial automation, cargo handling, warehouse managing, monitoring of autonomous robot or personnel localization, require reliable indoor positioning. In particular, the requirement is to accurately localize a mobile wireless node in real-time. In outdoor scenarios, Global Navigation Satellite Systems (GNSSs) are commonly used for positioning. Nevertheless, they present notable shortcomings for being used in indoor applications. The principal disadvantages are the low accuracy achieved and the attenuation and reflections introduced by buildings and other structures, which make impossible their use in most cases. The fixed and smaller operational area of an indoor positioning application in comparison with the area of an outdoor application makes it possible to install a radio positioning infrastructure. Concretely, the Ultra Wide Band (UWB) positioning system considered in this thesis consists of nodes installed in fixed and known positions (slaves) and a mobile node of unknown position (master) which is the one to be localized. The operation of the system is based on calculating the distance from the master to the slaves by measuring the Round-Trip-Time of a UWB pulse. In this way an estimate of the position can be obtained, with the advantage of having bounded errors, but, in contrast, the estimations have a low dynamic range and other navigation information cannot be measured. The master has some sensors attached, an Inertial Measurement Unit (IMU) and a Dead-Reckoning (DR) system. By propagating the navigation equations, estimates of the position and other navigational states can be obtained, but with the disadvantage of having errors that grow with time. The solution of the problems related to the individual location systems is using information fusion algorithms. Such algorithms, by means of integrating different sources of data, in this case the UWB range measurements and the IMU and DR measurements, create a positioning system which combines the benefits of the individual systems. In this project the aim is to develop, implement and evaluate sensor fusion algorithms. In particular, the developed algorithms are based on the Extended Kalman Filter and the Particle Filter. Furthermore, they have been adapted to different dynamic models, in order to find the algorithms which fit better with the motion of a mobile node. The developed algorithms has been tested with simulated trajectories using Matlab, and with real experimental datasets acquired by a mobile robot. The results have shown the benefits of the information fusion, since the accuracies obtained in the estimations have outperformed the accuracies obtained with the individual systems. Also in the most unfavorable cases, when one of the sources has high errors in the measurements, the algorithms have been able to discard the useless information and estimate using only the useful measurements, proving the robustness of the system.
Download or read book Fire Science and Technology 2015 written by Kazunori Harada and published by Springer. This book was released on 2016-10-04 with total page 891 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book focuses on topics in the entire spectrum of fire safety science, targeting research in fires, explosions, combustion science, heat transfer, fluid dynamics, risk analysis, structural engineering, and other subjects. The book contributes to a gain in advanced scientific knowledge and presents or advances new ideas in all topics in fire safety science. Two decades ago, the 1st Asia-Oceania Symposium on Fire Science and Technology was held in Hefei, China. Since then, the Asia-Oceania Symposia have grown in size and quality. This book, reflecting that growth, helps readers to understand fire safety technology, design, and methodology in diverse areas including historical buildings, photovoltaic panels, batteries, and electric vehicles.
Download or read book Indoor Real time Positioning Using Ultra wideband Technology written by Mohammadreza Yavari and published by . This book was released on 2015 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis investigates the capability of Ultra-Wide Band (UWB) communication technology to be used for indoor real-time positioning. The integration of an inertial measurement unit (IMU) to increase positioning accuracy was also evaluated. We designed and implemented a novel evaluation method for positioning systems that compares each of the position estimates with the ground truth position at the same moment. We experimentally verified the accuracy of an UWB positioning system in line-of-sight (LOS) conditions to be, on average, 10.97 cm for a robot moving at around 0.16 m/s on a track of length 6.7 m. In the case of non-line-of-sight (NLOS) conditions, accuracy on a track of length 9.7 m for the same moving robot was, on average, 58.47 cm. Data fusion of IMU and UWB measurements using an extended Kalman filter increased average positioning accuracy to 51.96 cm, an 18.8% increase over UWB measurements alone, in NLOS conditions. In LOS conditions, we observed that data fusion of IMU and UWB measurements decreases the average positioning accuracy (from 10.97 cm to 14.17 cm) compared to use of UWB only position estimation.
Download or read book Advances in Intelligent Automation and Soft Computing written by Xiaolong Li and published by Springer Nature. This book was released on 2021-07-26 with total page 1317 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents select proceedings of the International Conference on Intelligent Automation and Soft Computing (IASC2021). Various topics covered in this book include AI algorithm, neural networks, pattern recognition, machine learning, blockchain technology, system engineering, computer vision and image processing, adaptive control and robotics, big data and data processing, networking and security. The book is a valuable reference for beginners, researchers, and professionals interested in artificial intelligence, automation, and soft computing.
Download or read book 13th EAI International Conference on Body Area Networks written by Chika Sugimoto and published by Springer Nature. This book was released on 2020-03-03 with total page 469 pages. Available in PDF, EPUB and Kindle. Book excerpt: The papers in this proceeding discuss current and future trends in wearable communications and personal health management through the use of wireless body area networks (WBAN). The authors posit new technologies that can provide trustworthy communications mechanisms from the user to medical health databases. The authors discuss not only on-body devices, but also technologies providing information in-body. Also discussed are dependable communications combined with accurate localization and behavior analysis, which will benefit WBAN technology and make the healthcare processes more effective. The papers were presented at the 13th EAI International Conference on Body Area Networks (BODYNETS 2018), Oulu, Finland, 02-03 October 2018.
