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Increasingly ubiquitous wireless technologies require novel localization techniques to pinpoint the position of an uncooperative node, whether the target is a malicious device engaging in a security exploit or a low-battery handset in the middle of a critical emergency. Such scenarios necessitate that a radio signal source be localized by other network nodes efficiently, using minimal information. The authors propose two new algorithms for estimating the position of an uncooperative transmitter, based on the Received Signal Strength (RSS) of a single target message at a set of receivers whose coordinates are known. As an extension to the concept of centroid localization, their mechanisms weigh each receiver's coordinates based on the message's relative RSS at that receiver, with respect to the span of RSS values over all receivers.
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