File Name: wlan positioning systems principles and applications in location based services .zip
Describing the relevant detection and estimation theory, this detailed guide provides the background knowledge needed to tackle the design of practical WLAN positioning systems. It sets out key system-level challenges and design considerations in increasing positioning accuracy and reducing computational complexity, and it also examines design trade-offs and experimental results. Radio characteristics in real environments are discussed, as are the theoretical aspects of non-parametric statistical tools appropriate for modeling radio signals, statistical estimation techniques and the model-based stochastic estimators often used for positioning. A historical account of positioning systems in also included, giving graduate students, researchers and practitioners alike the perspective needed to understand the benefits and potential applications of WLAN positioning.
Skip to Main Content. A not-for-profit organization, IEEE is the world's largest technical professional organization dedicated to advancing technology for the benefit of humanity. Use of this web site signifies your agreement to the terms and conditions. A survey of positioning techniques and location based services in wireless networks Abstract: Positioning techniques are known in a wide variety of wireless radio access technologies.
Many techniques are used to estimate client position in a wireless network. They are based on the characteristics of the received wireless signals: power, time or angle of arrival.
In addition, hybrid positioning techniques make use of the collaboration between different wireless radio access technologies existing in the same geographical area. Client positioning allows the introduction of numerous services like real-time tracking, security alerts, informational services and entertainment applications. In this paper, we explain the principles behind positioning techniques used in satellite networks, mobile networks and Wireless Local Area Networks. We also describe hybrid localization methods that exploit the coexistence of several radio access technologies in the same region, and we classify the location based services into several categories.
When localization accuracy is improved, position-dependant services become more robust and efficient, and user satisfaction increases. Article :. DOI: Need Help?
Metrics details. Wi-Fi-based indoor positioning for determining accurate wireless indoor location information has become crucial in meeting increasing demands for location-based services by leveraging the Internet of Things IoT and ubiquitous connectivity. Most Wi-Fi-based indoor positioning techniques using wireless received signal strength RSS -based methods are affected by the indoor environment and depend on the respective signals from at least three reference access points. In this paper, we propose a cloudlet-based cloud computing system enabling Wi-Fi indoor positioning and navigation through a Wi-Fi located on a one-hop wireless network. Our cloudlet-based cloud computing system provides the reference point data and real-time interactive response for a self-driving indoor cart.
The advances in localization based technologies and the increasing importance of ubiquitous computing and context-dependent information have led to a growing business interest in location-based applications and services. Today, most application requirements are locating or real-time tracking of physical belongings inside buildings accurately; thus, the demand for indoor localization services has become a key prerequisite in some markets. Moreover, indoor localization technologies address the inadequacy of global positioning system inside a closed environment, like buildings. Based on this, though, this paper aims to provide the reader with a review of the recent advances in wireless indoor localization techniques and system to deliver a better understanding of state-of-the-art technologies and motivate new research efforts in this promising field. For this purpose, existing wireless localization position system and location estimation schemes are reviewed, as we also compare the related techniques and systems along with a conclusion and future trends. Location based services LBSs [ 1 ] are a significant permissive technology and becoming a vital part of life.
Skip to search form Skip to main content You are currently offline. Some features of the site may not work correctly. Kushki and K. Plataniotis and A. Kushki , K. Plataniotis , A. Venetsanopoulos Published Engineering.
Request PDF | WLAN positioning systems: Principles and applications in location-based services | Describing the relevant detection and estimation theory, this.
Skip to Main Content. A not-for-profit organization, IEEE is the world's largest technical professional organization dedicated to advancing technology for the benefit of humanity. Use of this web site signifies your agreement to the terms and conditions. A survey of positioning techniques and location based services in wireless networks Abstract: Positioning techniques are known in a wide variety of wireless radio access technologies. Many techniques are used to estimate client position in a wireless network.
The rising popularity of location-based services has prompted considerable research in the field of indoor location systems. Since there is no single technology to support these systems, it is necessary to consider the fusion of the information coming from heterogeneous sensors. This paper presents a software architecture designed for a hybrid location system where we can merge information from multiple sensor technologies. The architecture was designed to be used by different kinds of actors independently and with mutual transparency: hardware administrators, algorithm developers and user applications. The paper presents the architecture design, work-flow, case study examples and some results to show how different technologies can be exploited to obtain a good estimation of a target position.
Such systems include assisted GPS, urban positioning services through hotspot databases, and indoor positioning systems. Wi-Fi positioning takes advantage of the rapid growth in the early 21st century of wireless access points in urban areas. The most common and widespread localization technique used for positioning with wireless access points is based on measuring the intensity of the received signal received signal strength indication or RSSI and the method of "fingerprinting".
And how to obtain the location information is the key point of location-aware service. Finally some issues need to be resolved in future are discussed. Unable to display preview. Download preview PDF.
Она начала с совершенного квадрата Юлия Цезаря. Цезарь, объясняла она, был первым в истории человеком, использовавшим шифр. Когда его посыльные стали попадать в руки врага имеете с его секретными посланиями, он придумал примитивный способ шифровки своих указаний.
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