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Determining where a given sensor is physically located is a challenging issue. In this paper, the authors address the localization problem where, initially, a certain number of sensors called anchors are aware of their positions. Their goal is to localize all sensors with high accuracy, while using a limited number of anchors. So, they focus on localization techniques based on angle of arrival information between neighbor nodes. This paper proposes an original angle-based localization technique, called AT-Angle, which allows to verify two important properties: first, a sensor node can eliminate wrong received information about its position; second, it deduces if its estimated position is closed to its real position.
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