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Accurate and low-cost sensor localization is a critical requirement for the deployment of wireless sensor networks in a wide variety of applications. Many applications require the sensor nodes to know their locations with a high degree of precision. Various localization methods based on mobile anchor nodes have been proposed for assisting the sensor nodes to determine their locations. However, none...
In this paper, we explore the possibility of using directionality of free-space-optical (a.k.a. optical wireless) communications for solving the 3-D localization problem in ad-hoc networking environments. Range-based localization methods either require a higher node density (i.e., at least three other localized neighbours must exist) than required for assuring connectedness or a high-accuracy power-intensive...
In this paper, we use experiments to examine the accuracy of standalone Global positioning System (GPS) for relative location discovery in wireless sensor networks. The relative locations are obtained by comparison of stand-alone global GPS position fixes. We seek to find out if stand-alone GPS measurements from inexpensive GPS receivers can result in the relative positioning accuracies desired. Various...
Mobile wireless sensors need to know their localizations in many control and monitoring applications. Among all sensors, some know their exact position (i.e., they are equipped with GPS or they are positioned by human intervention). These sensors are called anchors. Some sensors can have different capabilities allowing them to calculate either distances or angles when they receive messages from others...
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