Using Ambient Radio Signals Andrei Popleteev SnT, University of - PowerPoint PPT Presentation

Device-Free Indoor Localization Using Ambient Radio Signals Andrei Popleteev SnT, University of Luxembourg

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Image: Particle physics education CD-ROM, 1999 CERN.

Device-free sensing • User freedom – Nothing to carry • Research freedom – More computational resources at hand – Unlimited grid power, not battery – More antennas 4

State of the art: Line-of-sight shadowing Wireless transceivers 5

State of the art: Line-of-sight shadowing 6

State of the art: Line-of-sight shadowing 7

State of the art: Line-of-sight shadowing 8

State of the art: Line-of-sight shadowing 9

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Source: fmscan.org

Ambient radio sensing 12

Proof of the concept (video)

Sample dataset 14

Localization performance • 4 days, 2 datasets daily • 85% same-day accuracy • 65% three days later (still better than 20% of random guess) 15

The more stations – the better 1 Localization accuracy 0.8 0.6 0.4 0.2 0 5 6 7 8 9 10 11 Number of channels 16

Summary • Device-free localization with ambient radio is feasible • Frequency diversity is essential 17

Thank you!