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The authors introduce a system for multiple target range-based localization systems, such as those based on Time-Of-Arrival (TOA) and Received Signal Strength Indicator (RSSI) for distance measurement estimations. In order to improve the accuracy of the location estimation for all target nodes, their system makes use of distance estimations between target nodes as well as between anchor and target nodes, and weights for all nodes. They propose variations on two popular localization algorithms and compare their accuracy against that of the conventional algorithms using simulations and experiments. Their results show that their proposal consistently offers better localization accuracy than the conventional algorithms.
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