Implementation of a Locationing Engine for Low Power Sensor Nodes

Tufan Karalar
(Professor Jan M. Rabaey)
National Science Foundation

Low power locationing systems are essential parts of distributed sensor networks. As a part of PicoNode 3 digital protocol processing chip, a locationing block is being implemented on silicon. Hop-counts from certain sensor nodes (coined anchors) with known positions are utilized to estimate the position of the node. The block executes the LS position estimation, also called triangulation, as well as encoding and decoding of the Pico Radio packets that contain locationing information. In future work the actual distances, instead of hop counts, between nodes are to be measured using radio signals. This scheme is planned to utilize the time of flight measurements of the radio signals with an accurate version of GPS-type signaling.

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