Location Estimation In Sensor Networks

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Location Estimation In Sensor Networks

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Author : Neal Patwari
language : en
Publisher:
Release Date : 2005

Location Estimation In Sensor Networks written by Neal Patwari and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005 with categories.

Probability Grid A Location Estimation Scheme For Wireless Sensor Networks

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Author :
language : en
Publisher:
Release Date : 2004

Probability Grid A Location Estimation Scheme For Wireless Sensor Networks written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2004 with categories.

Location information is of paramount importance for Wireless Sensor Networks (WSN). The accuracy of collected data can significantly be affected by an imprecise positioning of the event of interest. Despite the importance of location information, real system implementations, that do not use specialized hardware for localization purposes, have not been successful. In this paper, we propose a location estimation scheme that uses a probabilistic approach for estimating the location of a node in a sensor network. Our localization scheme makes use of additional knowledge of topology deployment. We assume a sensor network is deployed in a controlled manner, where the goal of the deployment is to form a grid topology. We evaluate our localization scheme through simulations, showing localization errors as low as 3% of radio range. We outperform similar localization schemes by obtaining 50% less error in localization, when compared to them. We also evaluate our localization solution and the DV-Hop scheme in a real implementation, obtaining an average error in location of 79% of radio range, outperforming DV-Hop by approximately 40%. We analyze the significant differences in performance between simulations and a real implementation and stress the importance of further evaluations of real implementations. The result is an effective and realistic protocol that works in an actual implementation, under certain assumptions, because it exploits deployment information.

Node Localization In Wireless Sensor Networks

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Author : Xue Zhang
language : en
Publisher: Morgan & Claypool Publishers
Release Date : 2016-12-19

Node Localization In Wireless Sensor Networks written by Xue Zhang and has been published by Morgan & Claypool Publishers this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016-12-19 with Technology & Engineering categories.

In sensor network applications, measured data are often meaningful only when the location is accurately known. In this booklet, we study research problems associated with node localization in wireless sensor networks. We describe sensor network localization problems in terms of a detection and estimation framework and we emphasize specifically a cooperative process where sensors with known locations are used to localize nodes at unknown locations. In this class of problems, even if the location of a node is known, the wireless links and transmission modalities between two nodes may be unknown. In this case, sensor nodes are used to detect the location and estimate pertinent data transmission activities between nodes. In addition to the broader problem of sensor localization, this booklet studies also specific localization measurements such as time of arrival (TOA), received signal strength (RSS), and direction of arrival (DOA). The sequential localization algorithm, which uses a subset of sensor nodes to estimate nearby sensor nodes' locations is discussed in detail. Extensive bibliography is given for those readers who want to delve further into specific topics.

Location Estimation In Wireless Ad Hoc Sensor Networks

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Author : Enrique Alejandro Gutiřrez Blancarte
language : en
Publisher:
Release Date : 2007

Location Estimation In Wireless Ad Hoc Sensor Networks written by Enrique Alejandro Gutiřrez Blancarte and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2007 with Algorithms categories.

Quadrant Based Location Estimation In Ad Hoc Sensor Networks

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Author : Yuemei Huang
language : en
Publisher:
Release Date : 2004

Quadrant Based Location Estimation In Ad Hoc Sensor Networks written by Yuemei Huang and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2004 with categories.

Localization In Wireless Sensor Networks

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Author : Xue Zhang
language : en
Publisher:
Release Date : 2016

Localization In Wireless Sensor Networks written by Xue Zhang and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016 with Wireless sensor networks categories.

In many applications, measured sensor data is meaningful only when the location of sensors is accurately known. Therefore, the localization accuracy is crucial. In this dissertation, both location estimation and location detection problems are considered. In location estimation problems, sensor nodes at known locations, called anchors, transmit signals to sensor nodes at unknown locations, called nodes, and use these transmissions to estimate the location of the nodes. Specifically, the location estimation in the presence of fading channels using time of arrival (TOA) measurements with narrowband communication signals is considered. Meanwhile, the Cramer-Rao lower bound (CRLB) for localization error under different assumptions is derived. Also, maximum likelihood estimators (MLEs) under these assumptions are derived. In large WSNs, distributed location estimation algorithms are more efficient than centralized algorithms. A sequential localization scheme, which is one of distributed location estimation algorithms, is considered. Also, different localization methods, such as TOA, received signal strength (RSS), time difference of arrival (TDOA), direction of arrival (DOA), and large aperture array (LAA) are compared under different signal-to-noise ratio (SNR) conditions. Simulation results show that DOA is the preferred scheme at the low SNR regime and the LAA localization algorithm provides better performance for network discovery at high SNRs. Meanwhile, the CRLB for the localization error using the TOA method is also derived. A distributed location detection scheme, which allows each anchor to make a decision as to whether a node is active or not is proposed. Once an anchor makes a decision, a bit is transmitted to a fusion center (FC). The fusion center combines all the decisions and uses a design parameter $K$ to make the final decision. Three scenarios are considered in this dissertation. Firstly, location detection at a known location is considered. Secondly, detecting a node in a known region is considered. Thirdly, location detection in the presence of fading is considered. The optimal thresholds are derived and the total probability of false alarm and detection under different scenarios are derived.

Location Estimation In 2d For Sensor Networks

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Author : Manoj Geo Varghese
language : en
Publisher:
Release Date : 2003

Location Estimation In 2d For Sensor Networks written by Manoj Geo Varghese and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2003 with categories.

Rss Aoa Based Target Localization And Tracking In Wireless Sensor Networks

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Author : Slavisa Tomic
language : en
Publisher: CRC Press
Release Date : 2022-09-01

Rss Aoa Based Target Localization And Tracking In Wireless Sensor Networks written by Slavisa Tomic and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2022-09-01 with Science categories.

The desire for precise knowledge about the location of a moving object at any time instant has motivated a great deal of scientific research recently. This is owing to a steady expansion of the range of enabling devices and technologies, as well as the need for seamless solutions for location-based services. Besides localization accuracy, a common requirement for emerging solutions is that they are cost-abstemious, both in terms of the financial and computational cost. Hence, development of localization strategies from already deployed technologies, e.g., from different terrestrial radio frequency sources is of great practical interest. Amongst other, these include localization strategies based on received signal strength (RSS), time of arrival, angle of arrival (AoA) or a combination of them. RSS-AoA-based Target Localization and Tracking in Wireless Sensor Networks presents recent advances in developing algorithms for target localization and tracking, reflecting the state-of-the-art algorithms and research achievements in target localization and tracking based on hybrid (RSS-AoA) measurements.Technical topics discussed in the book include:Centralized RSS-AoA-based Target LocalizationDistributed RSS-AoA-based Target LocalizationRSS-AoA-based Target Tracking via Maximum A Posteriori EstimatorRSS-AoA-based Target Tracking via Kalman FilterRSS-AoA-based via Sensor NavigationThis book is of interest for personnel in telecommunications and surveillance industries, military, smart systems, as well as academic staff and postgraduate/research students in telecommunications, signal processing, and non-smooth and convex optimization.

Quadrant Based Location Estimation In Ad Hoc Sensor Networks

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Author : May Wong
language : en
Publisher:
Release Date : 2004

Quadrant Based Location Estimation In Ad Hoc Sensor Networks written by May Wong and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2004 with categories.

Algorithms And Protocols For Wireless Sensor Networks

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Author : Azzedine Boukerche
language : en
Publisher: Wiley-IEEE Press
Release Date : 2009

Algorithms And Protocols For Wireless Sensor Networks written by Azzedine Boukerche and has been published by Wiley-IEEE Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2009 with Computers categories.

Boukerche is well-known and established international researcher in the field of wireless mobile networks and distributed systems. This is one of the first publications to focus on wireless ad hoc and sensor networks with a concentration on algorithms and protocols providing you with a comprehensive resource to learn about the continuous advances in wireless and mobile communications.