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The Radio Signal Strength Indicator (RSSI)-based localization algorithm is an effective solution for passive object localization. However, the localization accuracy of the existing methods highly depends on the transceiver distance and deployment density. Generally speaking, to obtain higher accuracy, the authors need a denser sensor node deployment, which results in a higher deployment cost and more communication overheads. In this paper, they investigate this problem based on extensive measurements. According to the measurement results, they propose to localize objects using an RSSI Distribution based Localization (RDL) model to identify the object location by different RSSI distributions of the communicating links.
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