""Are You With Me?"" - Using Accelerometers to Determine if Two Devices Are Carried by the Same Person


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Date: January 2008
Type: White Paper
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Overview: This research paper from University of Washington presents a method based on a coherence function, a measure of linear correlation in the frequency domain, to reliably analyze walking data recorded by low-cost MEMS accelerometers to determine if two devices are carried by the same person. It uses inexpensive accelerometers and show that these sensors perform similarly to more expensive accelerometers for the frequency range of human motion, 0 to 10Hz. This paper also presents result from large test group illustrating the algorithm’s robustness and its ability to withstand real world time delays, crucial for wireless technologies like Bluetooth and 802.11.

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