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This article describes the methods and tools to verify the location of nodes in wireless sensor networks. Software product that allows to analyze the positioning based on the distance with different algorithms is proposed. As a result of simulation the next statistical output variables are defined: percentage of nodes, which have position determined; minimum, maximum and average error in assessing...
This research argues that the process of ad-hoc localization of an object can be performed by wireless sensors. It also proposes a procedure which uses Received Signal Strength Indicator (RSSI) to estimate the distance and uses signal payload for direction. So, when wireless sensors are installed in objects such as vehicles in a defined orientation, they will be able to compute the distance as well...
There are boundary nodes and a certain number of the isolated nodes in the wireless sensor network. If conducting the effective judgment and processing over them, the positioning errors of the entire network will be reduced. Based on principles and approaches of the graphic theory, the boundary nodes and isolated nodes will be judged. Through an analysis on the node density and the range and direction...
In wireless networks, localization or positioning of a mobile station (MS) is one of active research interests. Accurate, low-cost and efficient positioning is a critical requirement for the deployment of wireless network in a wide variety of applications. In this paper, we propose a new approach for accurate positioning using the angle of arrival (AOA) measurements. We perform the positioning of...
Wireless Sensor and Actuator Networks (WS&AN) currently face their actual deployment challenges. Simple point-to-point RF communications metrics remain focused on active modes peak power consumption and communication duty cycles. But, once RF links have to set themselves into mesh networks, complex interactions between RF nodes arise and various metrics must be taken into account. Here starts...
Node localization is an essential component of many wireless networks. It can be used to improve routing and enhance security. Localization can be divided into range-free and range-based algorithms. Range-based algorithms use measurements to estimate the distance between nodes. Range-free algorithms are based on proximity sensing between nodes. Range-based algorithms are more accurate but also more...
Localizing sensor nodes is essential due to their random distribution after deployment. To reach a long network lifetime, which strongly depends on the limited energy resources of every node, applied algorithms must be developed with an awareness of computation and communication cost. In this paper we present a new localization method, which places a minimum computational requirement on the nodes...
A method to do node localization in an indoor environment is presented in this paper. The propagation constant between nodes placed at different locations in an indoor office environment varies. Estimating an appropriate propagation constant is necessary in order to convert received signal strength information between two nodes into useful Euclidean distance. Using Euclidean distance as inputs to...
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