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Author : May Wong
Publisher :
ISBN 13 :
Total Pages : 70 pages
Book Rating : 4.:/5 (617 download)
Download or read book Quadrant-based Location Estimation in Ad Hoc Sensor Networks written by May Wong and published by . This book was released on 2004 with total page 70 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Yuemei Huang
Publisher :
ISBN 13 :
Total Pages : 92 pages
Book Rating : 4.:/5 (69 download)
Download or read book Quadrant-based Location Estimation in Ad Hoc Sensor Networks written by Yuemei Huang and published by . This book was released on 2004 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Enrique Alejandro Gutiřrez Blancarte
Publisher :
ISBN 13 :
Total Pages : 140 pages
Book Rating : 4.:/5 (313 download)
Download or read book Location Estimation in Wireless Ad-hoc Sensor Networks written by Enrique Alejandro Gutiřrez Blancarte and published by . This book was released on 2007 with total page 140 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : David Munoz
Publisher : Academic Press
ISBN 13 : 0080921930
Total Pages : 297 pages
Book Rating : 4.0/5 (89 download)
Download or read book Position Location Techniques and Applications written by David Munoz and published by Academic Press. This book was released on 2009-05-15 with total page 297 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is the definitive guide to the techniques and applications of position location, covering both terrestrial and satellite systems. It gives all the techniques, theoretical models, and algorithms that engineers need to improve their current location schemes and to develop future location algorithms and systems. Comprehensive coverage is given to system design trade-offs, complexity issues, and the design of efficient positioning algorithms to enable the creation of high-performance location positioning systems. Traditional methods are also reexamined in the context of the challenges posed by reconfigurable and multihop networks. Applications discussed include wireless networks (WiFi, ZigBee, UMTS, and DVB networks), cognitive radio, sensor networks and multihop networks. Features Contains a complete guide to models, techniques, and applications of position location Includes applications to wireless networks, demonstrating the relevance of location positioning to these "hot" areas in research and development Covers system design trade-offs and the design of efficient positioning algorithms, enabling the creation of future location positioning systems Provides a theoretical underpinning for understanding current position location algorithms, giving researchers a foundation to develop future algorithms David Muñoz is Director and César Vargas is a member of the Center for Electronics and Telecommunications, Tecnológico de Monterrey, Mexico. Frantz Bouchereau is a senior communications software developer at The MathWorks Inc. in Natick, MA. Rogerio Enríquez-Caldera is at Instituto Nacional de Atrofisica, Optica y Electronica (INAOE), Puebla, Mexico. Contains a complete guide to models, techniques and applications of position location Includes applications to wireless networks (WiFi, ZigBee, DVB networks), cognitive radio, sensor networks and reconfigurable and multi-hop networks, demonstrating the relevance of location positioning to these ‘hot’ areas in research and development Covers system design trade-offs, and the design of efficient positioning algorithms enables the creation of future location positioning systems Provides a theoretical underpinning for understanding current position location algorithms, giving researchers a foundation to develop future algorithms
Author : Chih-Yu Wen
Publisher :
ISBN 13 :
Total Pages : 160 pages
Book Rating : 4.:/5 (89 download)
Download or read book Distributed Algorithms for Localization and Management in Wireless Ad-hoc Sensor Networks written by Chih-Yu Wen and published by . This book was released on 2005 with total page 160 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Niveditha Sundaram
Publisher :
ISBN 13 :
Total Pages : 14 pages
Book Rating : 4.:/5 (961 download)
Download or read book Connectivity Based Location Estimation Scheume for Wireless Ad Hoc Networks written by Niveditha Sundaram and published by . This book was released on 2002 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Localization in Wireless Sensor Networks with Inaccurate Range Measurements written by and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: We refer to localization as the problem of estimating the spatial coordinates of wireless nodes in an ad-hoc network. Wireless sensor network is an example of such a network, where localization as a problem has been a challenging topic for several years. The position of sensor nodes can be either manually configured before deployment or a GPS receiver can be built into each of these nodes. The former approach is very tedious and error-prone while the latter is a costly proposition in terms of volume, money and power consumption. In this thesis, we consider the problem of determining the positions of wireless nodes using range measurements from multiple, sparsely located, beacon stations with known locations. Clusters of unknown nodes collaborate among themselves in estimating their positions with the help of beacon stations. The major problem is overcoming range measurement inaccuracies. We propose a simple position estimation algorithm that features robustness with respect to range measurement inaccuracies, has low complexity and distributed implementation using only local information. We analyze the performance of the algorithm based on rigorous simulation and theory. We then extend the simple algorithm to a probabilistic algorithm that overcomes some of the drawbacks present in the simple algorithm. The algorithm was designed and implemented in a wireless test-bed consisting of IEEE 802.11 based iPAQs to study its performance. Most of the current localization systems are based on multiple beacons assisting unknown nodes. In an attempt to eliminate some of the drawbacks present in such systems, we also propose and study a single mobile beacon based localization method where a mobile beacon assists unknown nodes in estimating their positions. An implementation of this method in a wireless testbed was used to evaluate the performance.
Author : Manoj Geo Varghese
Publisher :
ISBN 13 :
Total Pages : 24 pages
Book Rating : 4.:/5 (962 download)
Download or read book Location Estimation in 2D for Sensor Networks written by Manoj Geo Varghese and published by . This book was released on 2003 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Oziel Hernández Salgado
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (768 download)
Download or read book Position Location Estimation in Ad-hoc Networks Using a Dead Reckoning Approach written by Oziel Hernández Salgado and published by . This book was released on 2006 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Classical multilateration techniques for position estimation assume direct connectivity between land reference nodes and a node whose location we want to estimate, but in the case of ad-hoc networking position location schemes use pair-wise range and angle of arrival estimates made between all the nodes and their neighbors. In ad-hoc networks, devices are not required to be in range of fixed Access Points like in common cellular systems, instead, a few known-location devices in the network allow the remaining devices to calculate their location using a method called Dead Reckoning that is the process of estimating location based solely on consecutive distance and direction of travel estimates parting from the last known position. The distance vectors between each base station and the node of interest calculated using dead reckoning are different from the real distance due to the error created by the environmental conditions and by the hardware used to estimate the angle of arrival and time of arrival. This work presents a Maximum Likelihood estimator and its performance is compared versus a Linearized Weighted Least Squares estimator previously proposed in [1] assuming that the resultant error from the dead reckoning method has a M-Erlang distribution (exponentially distributed multipath interarrival times) and the availability of angle of arrival and time of arrival information at every node in the network. In addition we derive the Cramer-Rao Bound for the maximum likelihood estimator in order to evaluate the performance of the proposed method with respect to the number of available access points, time of arrival estimation accuracy and node density.
Author : Neal Patwari
Publisher :
ISBN 13 :
Total Pages : 418 pages
Book Rating : 4.3/5 (91 download)
Download or read book Location Estimation in Sensor Networks written by Neal Patwari and published by . This book was released on 2005 with total page 418 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Ashish Shah
Publisher :
ISBN 13 :
Total Pages : 102 pages
Book Rating : 4.:/5 (589 download)
Download or read book Location Computation in Wireless Ad Hoc Sensor Networks written by Ashish Shah and published by . This book was released on 2004 with total page 102 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Jessica Feng Sanford
Publisher : Springer
ISBN 13 : 9781493901647
Total Pages : 0 pages
Book Rating : 4.9/5 (16 download)
Download or read book Localization in Wireless Networks written by Jessica Feng Sanford and published by Springer. This book was released on 2014-06-11 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: In a computational tour-de-force, this volume wipes away a host of problems related to location discovery in wireless ad-hoc sensor networks. WASNs have recognized potential in many applications that are location-dependent, yet are heavily constrained by factors such as cost and energy consumption. Their “ad-hoc” nature, with direct rather than mediated connections between a network of wireless devices, adds another layer of difficulty. Basing this work entirely on data-driven, coordinated algorithms, the author’s aim is to present location discovery techniques that are highly accurate—and which fit user criteria. The research deploys nonparametric statistical methods and relies on the concept of joint probability to construct error (including location error) models and environmental field models. It also addresses system issues such as the broadcast and scheduling of the beacon. Reporting an impressive accuracy gain of almost 17 percent, and organized in a clear, sequential manner, this book represents a stride forward in wireless localization.
Author : Victor Hugo Pérez González
Publisher :
ISBN 13 :
Total Pages : 110 pages
Book Rating : 4.:/5 (697 download)
Download or read book Position Estimation Using Dead Reckoning and Other Localized Algorithms in Wireless Networks written by Victor Hugo Pérez González and published by . This book was released on 2008 with total page 110 pages. Available in PDF, EPUB and Kindle. Book excerpt: Classical position estimation techniques assume direct connectivity between a node with unknown coordinates and a certain amount of access points or landmarks. Position Estimation in Ad-Hoc Wireless Sensor Networks cannot be solved by using single hop algorithms because the node of interest may not be within the coverage area of the landmarks disabling any possibility of estimating the node s coordinates. This work is devoted to study localized multihop algorithms and to show the advantages and disadvantages of them. The work is primarily focused on an old navigational technique called Dead Reckoning whose estimations are based on ranging and angular measurements along a defined path between a given access point and the node of interest. It is the purpose of this thesis work to highlight every advantage offered by this localized algorithm over a family of localized algorithms known as Distance Vector algorithms.
Author : Xiaoli Li
Publisher :
ISBN 13 :
Total Pages : 72 pages
Book Rating : 4.:/5 (561 download)
Download or read book A Map-growing Localization Algorithm for Ad-hoc Sensor Networks written by Xiaoli Li and published by . This book was released on 2003 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt: The goal of this thesis research is to create a new algorithm for sensor network localization. Localization is an important process in deploying ad-hoc wireless sensor networks. Several localization algorithms have been developed. However, they do not achieve satisfactory performance on irregularly-shaped networks. In this thesis, I present a localization algorithm based on an idea of growing local maps. The simulation results show that this algorithm achieves better performance for well-connected but irregularly-shaped networks or networks with obstacles blocking connections between a node and some other nodes within its radio range. Compared with the popular localization algorithm APS [1], the map-growing algorithm is more accurate for C-shaped grid or hexagon networks with acceptable coverage (>%75) when the range error is less than or equal to 5% R, where R is the radio range.
Author : DeLynn A. Bettencourt
Publisher :
ISBN 13 :
Total Pages : 54 pages
Book Rating : 4.:/5 (78 download)
Download or read book An API for Localization in Ad-hoc Wireless Sensor Networks written by DeLynn A. Bettencourt and published by . This book was released on 2006 with total page 54 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Joaquín González Guerrero
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (143 download)
Download or read book Indoor localization using local node density in Ad-Hoc Wireless Sensor Networks written by Joaquín González Guerrero and published by . This book was released on 2009 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Prihamdhani P. Amran
Publisher :
ISBN 13 :
Total Pages : 90 pages
Book Rating : 4.:/5 (572 download)
Download or read book Wireless Location Estimation Using Generalized Linear Models written by Prihamdhani P. Amran and published by . This book was released on 2004 with total page 90 pages. Available in PDF, EPUB and Kindle. Book excerpt: Location estimation is a very important task in wireless communication systems. Its goal is to determine the geographic position and, in some cases, velocity and direction of motion of wireless devices. The main challenge and critical requirement is to design an accurate and low-cost location system. This technology is utilized for global position system (GPS) and some localization applications in cellular and sensor networks. We propose maximum likelihood (ML) methods for location estimation using received-signal-strength (RSS) and time-of-arrival (TOA) measurements. In the RSS case, we utilize both spatial and temporal measurements where the multipath fading effects are modeled using a Nakagami-[gamma] fading model. We also proposed to model the TOA measurement errors using the gamma distribution characteristic. We also derive Cramér-Rao bound (CRB) for the estimated location under both measurement scenarios. Simulation results show that the proposed algorithms outperform the commonly-used least-squares methods.
