Non Line Of Sight Sensor
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Ultra Wideband Based Indoor Localization Using Sensor Fusion And Support Vector Machine
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Author : Zhuoqi Zeng
language : en
Publisher: Logos Verlag Berlin GmbH
Release Date : 2020-12-21
Ultra Wideband Based Indoor Localization Using Sensor Fusion And Support Vector Machine written by Zhuoqi Zeng and has been published by Logos Verlag Berlin GmbH this book supported file pdf, txt, epub, kindle and other format this book has been release on 2020-12-21 with Technology & Engineering categories.
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.
Non Line Of Sight Sensor
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Author : Robert Carroll Michelson
language : en
Publisher:
Release Date : 1992
Non Line Of Sight Sensor written by Robert Carroll Michelson and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1992 with Detectors categories.
Non Line Of Sight Radar
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Author : Brian Watson
language : en
Publisher: Artech House
Release Date : 2019-02-28
Non Line Of Sight Radar written by Brian Watson and has been published by Artech House this book supported file pdf, txt, epub, kindle and other format this book has been release on 2019-02-28 with Technology & Engineering categories.
Non-Line-of-Sight Radar is the first book on the new and exciting area of detecting and tracking targets via radar multipath without direct-line-of-sight (DLOS). This revolutionary capability is finding new applications in the tracking of objects in non-line-of-sight (NLOS) urban environments including detection and tracking of UAVs. This book brings together for the first time all the essential underpinnings and techniques required to develop and field a viable NLOS radar. It presents many examples, including electromagnetic radiation propagation in urban NLOS environments, extracting building location and morphology from readily available terrain databases, predictive ray-tracing techniques, and multi-target NLOS tracking. Readers will learn how to apply radar to urban tracking that was previously deemed impossible. The book shows how real-time physics calculations can be incorporated into the radar processor, and how existing radar hardware can be adopted for non-line-of-sight radar use without major upgrades. Including results from both high-fidelity, physics-based simulations and actual flight test data, this book establishes the efficacy of NLOS radar in practical applications.
2020 Ieee 6th International Conference On Computer And Communications Iccc
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Author : IEEE Staff
language : en
Publisher:
Release Date : 2020-12-11
2020 Ieee 6th International Conference On Computer And Communications Iccc written by IEEE Staff and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2020-12-11 with categories.
ICCC is initiated in 2015 and it is organized by Sichuan Institute of Electronics, sponsored by IEEE, and supported by Southwest Jiaotong University, Sichuan University etc It will be held in Chengdu every year After the ICCC 2015 2019 conference, where more than 500 attendees from 12 countries all around the world have taken part, 2020 IEEE 6th International Conference on Computer and Communications (ICCC) will be held in Chengdu, China once again on Dec 11 14, 2020 On behalf of the Organizing Committee, we warmly invite you, Computer and Communications scientist, engineer or technician, graduate student, or simply interested by the technique, to take part in this unique and innovative conference with your enthusiasm to develop, your desire to apply and your willingness to mature the Computer and Communications technique and their applications
Watershed Sensor Network Non Line Of Sight Data Telemetry System
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Author : Paul Dorsey
language : en
Publisher:
Release Date : 2007
Watershed Sensor Network Non Line Of Sight Data Telemetry System written by Paul Dorsey and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2007 with categories.
A non-line-of-sight digital datalink has been developed and tested using a high frequency radio for transmission of water quality monitoring data within a 20 mile range. Features of this design include real-time continuous monitoring of remote sensor measurements, all-weather 30 Mhz transmission (without repeaters), and solar-powered remote telemetry stations. Remote sensor data is transmitted to a central monitoring station from a network of water quality sensor sites for alarms, analysis, and archiving purposes. The data telemetry system has the potential for receiving water quality monitoring data from several watershed locations simultaneously at one data processing point. Lastly, the cost efficiency of this system compared to typical cellular, satellite, or phone landline datalink systems.
Source Localization In Wireless Sensor Networks With Randomly Distributed Elements Under Multipath Propagation Conditions
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Author : Georgios Tsivgoulis
language : en
Publisher:
Release Date : 2009
Source Localization In Wireless Sensor Networks With Randomly Distributed Elements Under Multipath Propagation Conditions written by Georgios Tsivgoulis and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2009 with Wireless sensor networks categories.
This thesis proposes a least-squares error estimator for line-of-sight, direction of arrival-based localization and a hybrid source localization scheme that addresses multipath propagation for non-cooperative sources using random arrays of wireless sensors. Taking advantage of the dominant reflections, the proposed solution finds the location of a signal source by triangulation using the direction of arrival estimations of both the line-of-sight and the reflected components. It uses a space division multiple access, spread spectrum-based receiver to generate the direction of arrival estimates. The time difference of arrival information is used to discriminate between the line-of-sight and the non-line-of-sight signals and to associate the incoming multipath signal with the corresponding source and reflector pair. In special cases, the proposed scheme is capable of solving the association problem spatially without the need for time difference of arrival information. Simulation results are included to demonstrate that the proposed scheme provides improved estimates by exploiting the non-line-of-sight information.
Computational Optical Imaging
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Author : Zhengjun Liu
language : en
Publisher: Springer Nature
Release Date :
Computational Optical Imaging written by Zhengjun Liu and has been published by Springer Nature this book supported file pdf, txt, epub, kindle and other format this book has been release on with categories.
Ground Based Wireless Positioning
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Author : Kegen Yu
language : en
Publisher: John Wiley & Sons
Release Date : 2009-06-24
Ground Based Wireless Positioning written by Kegen Yu and has been published by John Wiley & Sons this book supported file pdf, txt, epub, kindle and other format this book has been release on 2009-06-24 with Technology & Engineering categories.
Ground Based Wireless Positioning provides an in-depth treatment of non-GPS based wireless positioning techniques, with a balance between theory and engineering practice. The book presents the architecture, design and testing of a variety of wireless positioning systems based on the time-of-arrival, signal strength, and angle-of-arrival measurements. These techniques are essential for developing accurate wireless positioning systems which can operate reliably in both indoor and outdoor environments where the Global Positioning System (GPS) proves to be inadequate. The book covers a wide range of issues including radio propagation, parameter identification, statistical signal processing, optimization, and localization in large and multi-hop networks. A comprehensive study on the state-of-the-art techniques and methodologies in wireless positioning and tracking is provided, including anchor-based and anchor-free localisation in wireless sensor networks (WSN). The authors address real world issues such as multipath, non-line-of-sight (NLOS) propagation, accuracy limitations and measurement errors. Presenting the latest advances in the field, Ground Based Wireless Positioning is one of the first books to cover non-GPS based technologies for wireless positioning. It serves as an indispensable reference for researchers and engineers specialising in the fields of localization and tracking, and wireless sensor networks. Provides a comprehensive treatment of methodologies and algorithms for positioning and tracking Includes practical issues and case studies in designing real wireless positioning systems Explains non-line-of-sight (NLOS) radio propagation and NLOS mitigation techniques Balances solid theory with engineering practice of non-GPS wireless systems
Advanced Optical Wireless Communication Systems
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Author : Shlomi Arnon
language : en
Publisher: Cambridge University Press
Release Date : 2012-05-24
Advanced Optical Wireless Communication Systems written by Shlomi Arnon and has been published by Cambridge University Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-05-24 with Technology & Engineering categories.
Combines theory with real-world case studies to give a comprehensive overview of modern optical wireless technology.
A Pulse Position Modulation System For Ultraviolet Non Line Of Sight Communication
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Author : Michael Peter Leonardi
language : en
Publisher:
Release Date : 2008
A Pulse Position Modulation System For Ultraviolet Non Line Of Sight Communication written by Michael Peter Leonardi and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2008 with Radio categories.