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检索条件"主题词=Localization algorithm"

共 223 条记录，以下是41-50 订阅

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A localization algorithm based on Beacon Error Problem in Underwater Wireless Sensor Network

A Localization Algorithm based on Beacon Error Problem in Un...

引用

15th IEEE International Conference on Communication Technology (ICCT)

作者： Liu, Linfeng Wu, Xiaoqi Zhu, Zhiwen Zhang, Ningshen Liu, Ye Nanjing Univ Posts & Telecommun Sch Comp Nanjing 210003 Jiangsu Peoples R China Nanjing Univ Posts & Telecommun Sch Internet Things Nanjing 210003 Jiangsu Peoples R China Univ Sci & Technol Suzhou Inst Adv Study Suzhou 215000 Peoples R China

ISBN: (纸本)9781479900749

Underwater wireless sensor networks (UWSNs) are the enabling technology for various underwater applications, and the interest in UWSNs is growing. Because underwater environment is usually complex and hostile, and beacons are prone to move offsetting from their origin positions and underwater channel occurs error easily. Hence, the coordinates provided by some beacons for the localization of unknown nodes are possible to be inaccurate. The positioning error of beacons will affect the accuracy of unknown nodes significantly. This paper proposes a localization algorithm for beacon error problem. The error beacons are filtered via an iteration selection process, after which the localization is executed with traditional localization algorithm, such as Centroid or Trilateration. The computation and complexity of algorithm is analyzed and is proven preferable. The simulation results suggest that this algorithm can improve the positioning accuracy effectively by the filter of error beacons.

关键词： Underwater Wireless Sensor Networks localization algorithm Beacon Error Beacon Filtering

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Study on high resolution and high repeatability target localization algorithm in development of national level standard

Study on high resolution and high repeatability target local...

引用

Conference on Applied Optics and Photonics (AOPC) - Image Processing and Analysis

作者： Huang, Yao Wang, Weichen Xue, Zi Natl Inst Metrol Beijing 100013 Peoples R China

ISBN: (纸本)9781628419009

At the National Institute of Metrology, China, the national level standard was established for calibrating the level measuring instruments widely used in the field of surveying, construction and engineering. As a key technology in the development, an auto collimation system was set up to compare the level under test with the water level. In the auto collimation system, a charge-coupled device (CCD) camera was set up to acquired the image of a light spot reflected from the water surface and the plane mirror, a composite image processing and analyzing algorithm was designed to find the exact position of the light spot in the image. This target localization algorithm consists of sub-algorithm of background de-noising, dimension transforming, and curve fitting. The experiments prove that this algorithm get resolution of 0.002 '', and repeatability of 0.01 ''.

关键词： Level standard Auto collimation localization algorithm CCD

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A new localization algorithm of Mobile Phone for Outdoor Emergency Rescue

A new localization Algorithm of Mobile Phone for Outdoor Eme...

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3rd International Conference on Intelligent System Design and Engineering Applications (ISDEA)

作者： Ma, Xin Huang, Quan-yi Shu, Xue-ming Tsinghua Univ Dept Engn Phys Inst Publ Safety Res Beijing 100084 Peoples R China

ISBN: (纸本)9780769549231

In outdoor emergency rescue, it is of utmost importance to acquire the location of trapped people, the more quickly and precisely the location can be determined, the more chance can be saved for the victims. Taking a mobile phone of trapped people as a localization carrier, this work proposes a Remote Emergency localization (REL) algorithm to calculate the location of mobile phone based on Portable Base Station (PBS). The performance of REL approach is evaluated by simulation, the results show REL is efficient for outdoor emergency rescue.

关键词： Emergency rescue Mobile phone localization algorithm Simulation

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A Three-Dimensional Node localization algorithm Based on the Optimization of Hop Distance in Internet of Things 3

A Three-Dimensional Node Localization Algorithm Based on the...

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3rd International Conference on Information Communication and Software Engineering (ICICSE)

作者： Lao, Han Yu Jing, Zhang Pan Zhihua Univ Dept Math & Comp Panzhihua Peoples R China

ISBN: (纸本)9798350313048

This paper firstly analyzes and points out the problems of the traditional DV-Hop algorithm, then proposes a node localization algorithm based on the hop distance optimization, which uses the actual path distance between two anchor nodes instead of the traditional linear distance to calculate the average hop distance of anchor nodes, and further calculates the average hop distance of unknown nodes with the help of multiple anchor nodes. The simulation results show that the proposed localization algorithm can effectively improve the localization accuracy of nodes, especially in the 3D outdoor environment without ranging.

关键词： localization algorithm hop distance anchor node localization accuracy outdoor environment

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Research on ADV-Hop localization algorithm in wireless sensor networks

Research on ADV-Hop localization algorithm in wireless senso...

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7th International Symposium on Instrumentation and Control Technology

作者： Zhao, Shijun Xu, Xiulan Zhang, Zhaohui Sun, Meiling Univ Sci & Technol Beijing Dept Informat Engn Beijing 100083 Peoples R China China Univ Petr Dept Comp Shandong 257061 Peoples R China

ISBN: (纸本)9780819473615

Wireless sensor networks (WSN) have wide applicability to many important applications including environmental monitoring, military applications and disaster management, etc. In many applications, sensors are assumed to know their absolute locations. Some localization methods of WSN have been proposed. In these methods, nodes equipped with GPS to get precise location information, namely the anchor nodes, are employed to derive the locations of other nodes. Most of the recent work focuses on increasing the accuracy in position estimation. In this paper, aiming at the high communication cost and average positioning error of DV-hop algorithm, an advanced algorithm which is called ADV-hop algorithm is proposed. Simulations are made by the network simulator NS2. The simulation results show that ADV-hop algorithm has lower communication cost and smaller average positioning error than DV-hop algorithm, which makes ADV-hop algorithm more suitable for the node location of WSN.

关键词： WSN localization algorithm average positioning error communication cost

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DV-hop-MSO Based localization algorithm in Wireless Sensor Networks

DV-hop-MSO Based Localization Algorithm in Wireless Sensor N...

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7th China Conference of Wireless Sensor Networks (CWSN)

作者： Lv, Xiaoyu Sun, Xuemei Zhou, Xuefeng Xu, Guowei Tianjin Polytech Univ Sch Comp Sci & Software Engn Tianjin 300387 Peoples R China Tianjin Polytech Univ Sch Elect & Informat Engn Tianjin 300387 Peoples R China

ISBN: (纸本)9783642545221;9783642545214

Wireless Sensor Networks (WSNs) play an important role in making the dream of ubiquitous computing a reality. It has the potential to influence and improve everyone's life with a variety of applications in the future. However, there are a number of issues in deployment and exploitation of these networks that must be dealt with for sensor network applications to realize such potential. localization is one of the supporting technologies in wireless sensor networks, which can not provide the physical locations of events, but also help to improve the routing efficiency, optimize the network coverage and control the topology etc. Therefore, localization is one of the important issues of the WSN. This paper proposes an improved DV-hop localization algorithm for WSNs. The new localization algorithm, which not only maintains the advantages of DV-hop localization algorithm, but also overcomes the shortcomings of Mass-Spring Model (MSO) algorithm that it is easy to fall in to local optimum, make use of the advantages of error inhibition of MSO to solve the problem of calculation error in traditional DV-hop which use weighted least square estimates to calculate the coordinate of unknown nodes. Experimental results show that our proposed method is effective and robust, especially the node localization more accurately than DV-hop localization algorithm at the same network environment.

关键词： Wireless sensor network Mass spring model localization algorithm DV-hop

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A practical indoor TOA ranging error model for localization algorithm

A practical indoor TOA ranging error model for localization ...

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22nd IEEE International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC)

作者： He, Jie Wang, Qin Zhang, Qianxiong Liu, Bingfeng Yu, Yanwei Univ Sci & Technol Beijing Sch Comp & Commun Engn Beijing 100083 Peoples R China

ISBN: (纸本)9781457713484

This paper presents an practical RSSI based TOA ranging error model (RITEM) for localization algorithm, which can be used to estimate ranging error interval in real time. In RITEM, ranging error is classified into four classes by the RSSI value in TOA ranging process and ranging error of each class always within a certain interval. RITEM is verified by field tests in two typical indoor environments. Then, RITEM is applied into Ranging Error Classification (REC) based TOA localization algorithm to introduce its application methodology. Experiment result indicates that REC algorithm has significantly improved performance in typical indoor environment, comparing with LS, CN-TOAG and Nano localization algorithms.

关键词： TOA indoor location system localization algorithm indoor positioning system(IPS) RTLS

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Research on Improved Base Station localization algorithm in NLOS Environment After the Disaster 11

Research on Improved Base Station Localization Algorithm in ...

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11th International Conference on Communications, Circuits and Systems (ICCCAS)

作者： Hu, Zhexin Bu, Fanliang Wang, Yuanyuan Peoples Publ Secur Univ China Coll Informat Technol & Internet Secur Beijing Peoples R China

ISBN: (纸本)9781665469890

For the complex non-line-of-sight propagation environment after the disaster,propose an improved Chan-Taylor position solution method based on multiple base stations, integrate the improved residual weighting algorithm with the multivariate Taylor series expansion algorithm, and perform quadratic residual weighting. Moreover, in view of the actual situation of the lack of resources after the disaster, carry out the research of localization algorithm based on single base station, add additional observations such as base station motion state information, to realize secondary weighted positioning in non-line-of-sight environment. Simulation experiments show that, improved multiple base stations and single base station location algorithms can better suppress non-line-of-sight errors, and it is of great significance to carry out location search and rescue in time after the disaster.

关键词： multiple base stations single base station non-line-of-sight localization algorithm

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Sensor Nodes localization algorithm in Noisy Environments

Sensor Nodes Localization Algorithm in Noisy Environments

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3rd International Conference on Sensor Technologies and Applications

作者： Amosse, Antoine Lambadaris, Ioannis Talim, Jerome Carleton Univ Dept Syst & Comp Engn Ottawa ON K1S 5B6 Canada

ISBN: (纸本)9781424443093

Wireless Sensor Networks are more and more frequently integrated into many civil and military applications. Those applications rely on the system to determine accurately the location of the sensor nodes. Most existing localization algorithms are not efficient in noisy environments and assume that the nodes are already configured appropriately for the local environment. In this paper, we propose a novel method to determine the position of the nodes in a noisy environment. The preliminary step of our solution consists of characterizing the local environment parameters. The localization step implements an iterative procedure to determine the nodes position. The numerical results derived from the simulations show the robustness of our method when compared the Concentric Anchor Beacon (CAB) algorithm, one of the most efficient techniques. We also address the computation time, as a performance metric.

关键词： Wireless Sensors Simulation localization algorithm

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A localization algorithm Based on Virtual Beacon Nodes for Wireless Sensor Network

A Localization Algorithm Based on Virtual Beacon Nodes for W...

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7th China Conference of Wireless Sensor Networks (CWSN)

作者： Ma, Li He, Jianpei Ma, Dongchao North China Univ Technol Beijing Peoples R China

ISBN: (纸本)9783642545221;9783642545214

The position service is becoming more and more important for WSN applications. In order to resolve the problem of low positioning accuracy in WSN, a new positioning algorithm based on virtual beacon nodes is proposed. In this algorithm, the space is divided into several equal areas by anchor nodes;PIT theory is used to estimate the preliminary regional;the best virtual beacon nodes is calculated through the approach degree;finally, an unknown nodes position can be calculated by computing the centroid of the selected anchor nodes. This algorithm adopts the RF signal to locate unknown node. It can not only avoid the overlapped error in a range-based localization algorithm, but also avoid high complexity.

关键词： virtual beacon node localization algorithm computing complex location accuracy approach degree

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