Mr. Li Geng Yu Profile

Li Geng Yu

at Institute of Automation

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Proceedings Article | 14 March 2013 Paper

Near and far field beacon localization algorithm for wireless sensor networks

Ligeng Yu, Xueen Li, Bo Duan, Weijuan Han

Proceedings Volume 8768, 87687Y (2013) https://doi.org/10.1117/12.2010530

KEYWORDS: Near field, Sensors, Sensor networks, Transmitters, Error analysis, Antennas, Distance measurement, Data processing, Signal attenuation, Receivers

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Localization plays an important role in wireless sensor network management. Currently, the approaches mainly fall into two categories: range-based and range-free. In this paper, the proposed work combines the advantages of the two types of methods (range-based and range-free) to introduce the near and far field characteristic of RSSI(NFC), which is 1) in the near field, there is a relatively stable relationship between RSSI and distance. 2) In the far field, a max range of the signal radiation exists. NFC provides a new method of distance measurement and node positioning. A new localization technique (NFCB) based on NFC is also proposed. In this algorithm, anchor nodes transmit beacons at different power levels, which can divide geographical regions into the rings with multiple near and far field combination. From the information received by each beacon heard, nodes can determine its position, which depends on the property of intersections of near-fields. NFCB can turn the nodes with high-precisions into anchor nodes. Without increasing the hardware, it can raise the density of anchor nodes, which greatly improve positioning accuracy. Simulation results demonstrate that the estimation error is lower than CAB APIT.

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